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The role of activated carbon in the pharmaceutical industry02021-12-22 23:39:38
The iodine adsorption value, methylene blue adsorption value, strength and BET specific surface area of GAC were 1020.04mGG, 225mg/g, 88.73% and 1486.48m2/g respectively. The experimental results show that the impregnation ratio and carbon activation temperature have great effects on the adsorption performance of GAC, while the kneading temperature and impregnation ratio have great effects on the strength of GAC.activated carbon gold mining  Because the strength of GAC decreases with the increase of impregnation ratio, and the decrease range is large, so the preparation of GAC with compound activator is proposed. The results show that the composite activator can reduce the impregnation ratio of phosphoric acid to wood chips and improve the strength of granular activated carbon.activated carbon company  At the same time, the composite activator can improve the adsorption performance of GAC. Therefore, granular activated carbon with good adsorption performance and high strength can be prepared by this method. 
The role of activated carbon in the pharmaceutical industry02021-06-10 18:42:24
The focus of the whole production process is the activation section. At the present stage, some domestic activated carbon production enterprises use air as the activation gas in the activation process. Although it is cheap and easy to get, the air used as the activation gas in the production of activated carbon has a high burning loss rate, low product yield and low finished strength of activated carbon particles. The production of activated carbon by steam as activation gas has the advantages of low burning loss rate, high product yield and high strength of activated carbon particles.wood based activated carbon manufacturer  This project adopts the production process, that is, is the use of water vapor is activated, at the same time set up at the end of the activation furnace waste heat boiler to extract the sensible heat, the boiler and could be used to provide the necessary activation water vapor activation furnace, the design in improving the utilization ratio of resources at the same time, reduce the pollutant emissions, reduces the project's impact on the environment during production process.https://www.dxdcarbon.com/   Activation tail gas is treated and discharged by dust removal and desulfurization system after utilization. ⑴ Zinc chip ratio. Zinc chip ratio refers to the weight ratio of anhydrous zinc chloride to absolute raw wood chips. Zinc chip ratio has a decisive influence on the pore structure and adsorption properties of activated carbon. The pore structure of activated carbon is often adjusted by zinc chip ratio, which is the most important factor for the production of activated carbon by zinc chloride method. ⑵ The influence of raw material types. As a result of different species, wood resin content and hardness and other properties are different, thus the chemical penetration ability of wood chips have differences. Fir chips are usually the best, pine chips the next, and hard and miscellaneous chips the worst. ⑶ The moisture content of raw materials. The moisture content of the sawdust affects the rate of chemical penetration into the sawdust particles, thus affecting the impregnation time. When the moisture content of sawdust is more than 30%, the impregnation time is more than 8h. Generally, the moisture content of sawdust should not exceed 5%. According to the different production technology, the moisture content of sawdust has different specific indexes. (4) the influence of wood particle size. When the particle size of wood chips in the production of powdered activated carbon is 6~40 mesh, the particle size of wood chips has no obvious effect on the product quality. The effect of sawdust particle size on product quality is related to the zinc chip ratio used. When the zinc chips are relatively small (such as 80%), the wear resistance and relative density of activated carbon decrease with the increase of sawdust size. When the size of zinc chip is large (e.g. 200%), the wood chip particle size is 0.25~2.0mm, and the wear resistance and relative density of activated carbon are not significantly affected 
The role of activated carbon in the pharmaceutical industry02021-06-24 18:41:21
which is the inorganic part of activated carbon, and ash in active carbon is easy to cause secondary pollution.Because of its strong adsorption, activated carbon is widely used in production,In the life.Activated carbon material is processed by the amorphous carbon, has a large specific surface area, the gas, solution of inorganic or organic matter and colloidal particles have good adsorption capacity.Activated Carbon materials mainly include Activated Carbon (AC) and Activated Carbon Fibers (ACF), etc.Activated carbon material as a kind of excellent adsorbent, mainly because of its unique adsorption surface structure and surface chemical properties.Activated carbon material has stable chemical properties and high mechanical strength. Microwave method, microwave method is not independent of the physical method and chemical method of the preparation of activated carbon, but on the basis of the physical method and chemical method instead of the traditional heating method, but it has a very significant effect.wholesale activated carbon pellets  Microwave refers to the electromagnetic radiation located between far-infrared and radio waves in the electromagnetic spectrum, with a frequency range of 300MHz to 300GHz and a wavelength of 1m to 1mmMicrowave generates "internal friction heat" through high frequency reciprocating motion of dipole molecules in the heated body, which raises the temperature of the material. It does not require any heat conduction process, and has the characteristics of high efficiency, selectivity, non-contact, integrity, uniformity, quick start and stop, and easy operation Studies have shown that activated carbon can effectively absorb microwave energy and make the temperature rise to 110o℃5' within a few minutes.https://www.dxdcarbon.com  Microwave heating can produce good effects in the preparation and modification of activated carbon (S2. Microwave modification, many backwater hole is opened, the distributed capacitance change obviously, promoting the improvement of the adsorption. The microwave power and irradiation time are key determinants of modified activated carbon adsorption performance. On the mechanism of microwave carbonization and activation, it is generally believed that 
The role of activated carbon in the pharmaceutical industry02021-06-02 19:11:07
If the gas speed is very small, the size of the adsorber is large and uneconomical. If the gas velocity is too large, the pressure drop will increase and the adsorption efficiency will be affected.The optimum gas velocity was determined by experiment. The adsorption design can not pursue too high adsorption efficiency, the empty tower speed value is reduced, it will make the adsorption bed volume, the amount of adsorbent and equipment cost increased greatly;On the contrary, it is not appropriate to take too large empty tower gas speed. Although the equipment cost is low, the adsorption efficiency drops a lot, and the pressure drop of the system will rise rapidly with the increase of the empty tower speed, resulting in excessive power consumption. Therefore, due to the selection of the appropriate air speed of the empty tower, the most suitable air speed of the empty tower is 0.8~1.2m/s"21, according to the empirical conclusion, this design determines Air velocity of empty tower :U= 1.0m /s.Original conditions:Treatment air volume :Q=20000 m'h, design temperature is 35° C, pressure is 1.01325×103Pa Since the proportion of air in exhaust gas is far greater than that of pollutants, the properties of exhaust gas can be approximately viewed as the thermophysical properties of dry air. Please refer to Appendix 9 of Principles of Chemistry to obtain the following data:Properties of air mixture:Fluid density P;=1.147kg/ m', viscosity u,= 1.94×10-5 Pa.S, specific heat capacity C,=1.005kJ/(kg."C) coal-based activated carbon, also known as coal-based activated carbon.granular activated charcoal coconut  It is a general term for a large class of activated carbon products made of various raw coal through different processes.Coal-based activated carbon can be divided into molding carbon and raw coal direct crushing carbon according to the different manufacturing process.granular activated charcoal coconut  The former and can be further subdivided into wet molding charcoal (such as tar, papermaking black liquor, such as starch paste liquid adhesive manufacturing columnar, ball charcoal, honeycomb carbon, etc.) and dry molding charcoal (such as join solid bitumen, starch, such as tree powder as adhesive used for Mao briquette made of molding process, tabletting, pelleting and broken charcoal or rules of pelleting shape activated carbon). 
The role of activated carbon in the pharmaceutical industry02021-12-03 23:27:30
Affected by the change of energy prices, the enterprises that use petroleum and coke as raw materials to produce urea and methanol have successively transformed their gas-making systems to burn inferior coal to reduce costs.gold coconut shell activated carbon  These changes more or less to the original system and production process caused a certain impact, these new problems caused by the change of raw materials must be solved, to ensure the production of efficient and stable operation.activated carbon from china  In view of the characteristics of large amount of matter and high content of benzene organic matter in gas, the method of removing these substances is studied and the solution is given. In this study, the concentration of benzene, naphthalene and ash in gas before purifying feed-gas compressor was determined by chromatograph, picric acid titration and weighing method respectively. According to the measured values, the experimental flow was designed, and coke column and activated carbon column were made by themselves. The isobarisothermal adsorption properties of activated carbon at different temperatures, at different pressures and at different flow rates were determined by using the gas produced in the system as samples. The adsorption effluent curve of benzene by activated carbon was plotted. The effects of different temperature on the regeneration performance of activated carbon under static environment, the effects of steam at different temperature on the regeneration performance of activated carbon under dynamic environment and the effects of nitrogen at different temperature on the regeneration performance of activated carbon under dynamic environment were studied. 
The role of activated carbon in the pharmaceutical industry02021-12-05 21:48:16
Physical method is to use carbon dioxide, water vapor or the mixture of both as activator, the carbonized carbon material and gas in the activation furnace at 500~1200℃ for carbon activation reaction, so that the pore size of the carbonized material to expand, the formation of activated carbon with porous microcrystalline structure.Gas activation method mainly includes carbonization and activation engineering.The so-called carbonization, refers to the low temperature (about 500℃) is small, the volatile coal tar molecules in the material and the thermal decomposition and curing process of asphalt, that is, to remove the volatile in advance, made suitable for the next step of activation with carbonization.gold recovery activated carbon  When the temperature is below 600℃, the specific surface area of carbonized material increases with the increase of temperature.When 600~900℃, the specific surface area reaches a certain value: 250~300 m2/g; when above1000℃, the specific surface area shrinks rapidly. When the carbonization temperature is above 800℃, the reaction performance of carbonized compounds and activation gas gradually becomes weaker, so the carbonization temperature is generally below 1000℃. However, if the residual volatile content and thermal effect are taken into account, the most suitable temperature should be 600~700℃39].coconut activated carbon factory   The carbonized substance obtained from the carbonization process is placed in water vapor or a mixture of water vapor and combustion gas and heat treated at 800~1000℃, which is called the activation process. The commonly used activation gases are carbon dioxide, water vapor, oxygen, etc., due to the oxidation reaction of these gases on the surface of the carbonized substance, eroding the carbonized substance, thus producing a rich porous structure.(2) Chemical method. Chemical activation method is a method of preparing activated carbon by adding chemicals to the raw materials used or impregnation into the raw materials or carbonized materials, and then heating it at high temperature in inert gas.The chemicals used in chemical activation are generally dehydrating.The more commonly used activator is: inorganic acid varieties have phosphoric acid, sulfuric acid and boric acid, salt varieties have zinc chloride, calcium carbonate and potassium sulfate, alkali varieties have sodium hydroxide, potassium hydroxide, etc. 
The role of activated carbon in the pharmaceutical industry02021-12-05 21:51:05
Its adsorption is selective, and non-polar substances are easier to be adsorbed than polar substances.In the same series of substances, the higher the boiling point of the substance, the more tolerantEasy to be adsorbed, the greater the pressure, the lower the temperature, the greater the concentration, the greater the amount of adsorption.On the contrary, decompression and heating are beneficial to gas desorption.It is often used for gas adsorption,Separation and purification, recovery of solvents, decolorizing agents for sugar solution, grease, glycerin, medicine, deodorant for drinking water and refrigerators, filter agent for gas masks,It can also be used as a catalyst or metal salt catalyst carrier.Early production of activated carbon raw materials for wood, hard nut shell or animal bones, later mainly used coal, after dryingDistillation, activation treatment after the production of activated carbon methods are :① steam, gas activation method.Carbon is activated by water vapor or carbon dioxide at 850~900℃. ② chemical activation method.Activated carbon can be obtained after high temperature treatment by using the gas released by the activator or soaking the raw material with the activator.Activated carbon has a micro product structure, the micro product arrangement is completely irregular, the product body has micropores (radius is less than 20[angstroms]=10-10 meters), through the hole (halfDiameter 20~1000), large hole (radius 1000~100000), so that it has a large inner surface, specific surface area of 500~1700 m 2/ g.This determines that activated carbon has good adsorption, can adsorb the metal ions in waste water and waste gas, harmful gases, organic pollutants, pigments and so on.  gold coconut shell activated carbon  ② chemical activation method.Activated carbon can be obtained after high temperature treatment by using the gas released by the activator or soaking the raw material with the activator.Activated carbon has a micro product structure, the micro product arrangement is completely irregular, the product body has micropores (radius is less than 20[angstroms]=10-10 meters), through the hole (halfDiameter 20~1000), large hole (radius 1000~100000), so that it has a large inner surface, specific surface area of 500~1700 m 2/ g.This determines that activated carbon has good adsorption, can adsorb the metal ions in waste water and waste gas, harmful gases, organic pollutants, pigments and so on. activated carbon from china 
The role of activated carbon in the pharmaceutical industry02021-12-27 22:35:56
Therefore, it is of practical significance to explore and seek an effective pretreatment method. In this paper, Fenton oxidation and activated carbon adsorption were combined to pretreat the wastewater from natural gas purification maintenance, in order to improve the subsequent operation efficiency of UASB.activated carbon gold mining  This experiment by orthogonal test to determine the Fenton reagent oxidation first preliminary operating conditions, on this basis, carries on the single factor analysis method, the main factors influencing the Fenton reagent treatment effect for each study, investigation of its influence on wastewater COD removal rate, the results show that Fenton oxidation method the optimum operating conditions for natural gas purification overhaul wastewater treatment: HO2 dosing quantity 0.3 mol/L, n (HO)/n (Fe) = systematically, initial pH = 3, reaction temperature 70 ℃, reaction time, 40 min.activated carbon company  Under these conditions, the COD removal rate reached 78.6%, the BOD /COD value increased from 0.168 to 0.353-0.403, and the biodegradability was greatly improved. If Ho is added in three times and the interval time is 10min, the COD removal rate will increase from 78.6% to 80.3%. Therefore, it can be seen that H0: batch addition will further improve the reaction effect. After Fenton oxidation treatment, wastewater and activated carbon adsorption, this topic activated carbon adsorption experiments using single factor method, examines different PH, activated carbon adsorption dosing quantity and the influence of adsorption time of wastewater COD removal rate, the results show that after Fenton oxidation treatment without having to adjust PH value, according to the 20 g/L after adding the activated carbon reaction 3 h at room temperature, COD removal rate was 47.3%,, BOD/COD value of 0.438 to 0.625. The research in this paper has laid a theoretical foundation and provided an experimental basis for the practical application of Fenton oxidation and activated carbon adsorption in the pretreatment of natural gas purification maintenance wastewater in UASB reactor. 
The role of activated carbon in the pharmaceutical industry02021-12-20 00:22:30
Its adsorption is selective, and non-polar substances are easier to be adsorbed than polar substances.In the same series of substances, the higher the boiling point of the substance, the more tolerantEasy to be adsorbed, the greater the pressure, the lower the temperature, the greater the concentration, the greater the amount of adsorption.On the contrary, decompression and heating are beneficial to gas desorption.It is often used for gas adsorption,Separation and purification, recovery of solvents, decolorizing agents for sugar solution, grease, glycerin, medicine, deodorant for drinking water and refrigerators, filter agent for gas masks,It can also be used as a catalyst or metal salt catalyst carrier.Early production of activated carbon raw materials for wood, hard nut shell or animal bones, later mainly used coal, after dryingDistillation, activation treatment after the production of activated carbon methods are :① steam, gas activation method.Carbon is activated by water vapor or carbon dioxide at 850~900℃.activated carbon gold mining  ② chemical activation method.Activated carbon can be obtained after high temperature treatment by using the gas released by the activator or soaking the raw material with the activator.Activated carbon has a micro product structure, the micro product arrangement is completely irregular, the product body has micropores (radius is less than 20[angstroms]=10-10 meters), through the hole (halfDiameter 20~1000), large hole (radius 1000~100000), so that it has a large inner surface, specific surface area of 500~1700 m 2/ g.This determines that activated carbon has good adsorption, can adsorb the metal ions in waste water and waste gas, harmful gases, organic pollutants, pigments and so on. activated carbon company 
The role of activated carbon in the pharmaceutical industry02021-12-27 22:38:48
Therefore, it is of practical significance to explore and seek an effective pretreatment method. In this paper, Fenton oxidation and activated carbon adsorption were combined to pretreat the wastewater from natural gas purification maintenance, in order to improve the subsequent operation efficiency of UASB. www.powdered-activated-carbon.com  This experiment by orthogonal test to determine the Fenton reagent oxidation first preliminary operating conditions, on this basis, carries on the single factor analysis method, the main factors influencing the Fenton reagent treatment effect for each study, investigation of its influence on wastewater COD removal rate, the results show that Fenton oxidation method the optimum operating conditions for natural gas purification overhaul wastewater treatment: HO2 dosing quantity 0.3 mol/L, n (HO)/n (Fe) = systematically, initial pH = 3, reaction temperature 70 ℃, reaction time, 40 min.activated carbon pellets wholesale   Under these conditions, the COD removal rate reached 78.6%, the BOD /COD value increased from 0.168 to 0.353-0.403, and the biodegradability was greatly improved. If Ho is added in three times and the interval time is 10min, the COD removal rate will increase from 78.6% to 80.3%. Therefore, it can be seen that H0: batch addition will further improve the reaction effect. After Fenton oxidation treatment, wastewater and activated carbon adsorption, this topic activated carbon adsorption experiments using single factor method, examines different PH, activated carbon adsorption dosing quantity and the influence of adsorption time of wastewater COD removal rate, the results show that after Fenton oxidation treatment without having to adjust PH value, according to the 20 g/L after adding the activated carbon reaction 3 h at room temperature, COD removal rate was 47.3%,, BOD/COD value of 0.438 to 0.625. The research in this paper has laid a theoretical foundation and provided an experimental basis for the practical application of Fenton oxidation and activated carbon adsorption in the pretreatment of natural gas purification maintenance wastewater in UASB reactor. 
The role of activated carbon in the pharmaceutical industry02022-02-11 22:44:44
Adding appropriate chemical reagents will play the role of catalytic oxidation [73], and these chemical reagents will also increase the active point of activation reaction, which is conducive to the development of activated carbon pores. gold recovery from activated carbon  Now at home and abroad the main research work is mainly the following aspects: a, additive in the functional mechanism of manufacturing activated carbon energy gao jun of China university of mining mechanism of additives in the manufacturing activated carbon made detail [4, pointed out that: the catalyst in the carbonization stage prompted carbon the destruction of the molecular structure of aromatic raw materials, to "structure" of disordering, provides a good initial activation reaction conditions, is an important factor to improve the activation of activated carbon pore. In the process of activation, potassium to strengthen the directionality of the pore, thereby reducing the unnecessary on ignition, and accelerated the process of pore forming,activated carbon china manufacturers  And pore distribution is given priority to with microporous activated carbon; refractory in the catalyst to ash content of SiO2 and Al, 03, etc, into acid soluble potassium nepheline chemical compounds such as magnesium and calcium silicon stone is the key to improve pickling deliming rate factor b and additives on the activated carbon adsorption properties, pore structure and pore size distribution - adding different additives. The influence of the activated carbon: c, chemicals for coking products. 
The role of activated carbon in the pharmaceutical industry02021-12-07 18:54:37
The preparation methods of activated carbon include physical method, chemical method, microwave radiation method, etc.(1) Physical method.activated carbon gold mining  Physical method is to use carbon dioxide, water vapor or the mixture of both as activator, the carbonized carbon material and gas in the activation furnace at 500~1200℃ for carbon activation reaction, so that the pore size of the carbonized material to expand, the formation of activated carbon with porous microcrystalline structure.Gas activation method mainly includes carbonization and activation engineering.The so-called carbonization, refers to the low temperature (about 500℃) is small, the volatile coal tar molecules in the material and the thermal decomposition and curing process of asphalt, that is, to remove the volatile in advance, made suitable for the next step of activation with carbonization.activated carbon company   When the temperature is below 600℃, the specific surface area of carbonized material increases with the increase of temperature.When 600~900℃, the specific surface area reaches a certain value: 250~300 m2/g; when above1000℃, the specific surface area shrinks rapidly. When the carbonization temperature is above 800℃, the reaction performance of carbonized compounds and activation gas gradually becomes weaker, so the carbonization temperature is generally below 1000℃. However, if the residual volatile content and thermal effect are taken into account, the most suitable temperature should be 600~700℃39]. The carbonized substance obtained from the carbonization process is placed in water vapor or a mixture of water vapor and combustion gas and heat treated at 800~1000℃, which is called the activation process. 

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