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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 industry02021-12-03 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 industry02021-12-22 00:04:21
The polishing slurry and processing technology of micro-abrasive slurry jet were studied. Through the analysis of the physical and chemical properties of additives and their state changes under the jet, the comprehensive effects of the types and proportions of different additives, as well as the types, proportions and particle sizes of abrasive on the formation of uniform slurry, the promotion of good abrasive dispersion and the jet polishing effect were explored.activated carbon gold mining  The effects of different types of nozzles, polishing slurry, jet distance, jet time, different initial RA, jet pressure and jet Angle on the surface profile, material removal depth and surface quality of the workpiece were studied through polishing experiments. The local Ra of the optical glass surface is in the range of 20nm~50nm by MASJP, and the lowest Ra is 10.24nm. activated carbon company  
The role of activated carbon in the pharmaceutical industry02021-12-10 22:24:15
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. activated carbon for gold recovery  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].activated carbon wholesale  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 industry02021-12-22 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 industry02021-12-24 19:47:17
Natural gas purification wastewater is mainly divided into normal production wastewater and maintenance wastewater. The concentration of pollutants in normal production wastewater is low and can be treated by general biochemical treatment.activated carbon gold mining  The maintenance sewage contains a large number of complex biodegradable substances, biodegradability is poor, for many years mainly rely on fresh water dilution treatment and combustion furnace treatment, but these two methods are low efficiency and high cost, so it is necessary to develop new wastewater treatment methods.activated carbon company   Although we have studied the upflow anaerobic sludge bed reactor (UASB) for the treatment of high concentration sewage of the natural gas purification plant, the start-up test results of 133 days show that the effluent COD removal rate is only about 40% when the influent COD is 6000mg/L, and the treatment effect is not good. 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. 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. 
The role of activated carbon in the pharmaceutical industry02021-06-16 18:49:38
In domestic has been eliminated. Specific surface area test unified the multi-point BET method at home and abroad, specific surface area measurement standards are developed at home and abroad is based on BET test method, please see our national standard (GB/T 19587-2004) - gas adsorption BET principle of solid material specific surface area measurement methods. Specific surface area testing is actually the more time-consuming jobs, as the adsorption capacity of sample is different, some sample testing may need to spend the whole dayTime, if the test process is not fully automated, the tester can not leave at any time, and should be highly focused, observe the dashboard, control the knob, a little careless will lead to the failure of the test process, which will waste a lot of valuable time of the tester.https://www.activated-carbon-pellets.com  F - Sorb 2400 specific surface tester is really able to BET method detection instruments (both direct comparison method), the more important F - Sorb 2400 specific surface tester is by far the only specific surface area of the fully automated intelligent testing equipment, the test results with the international high consistency, the stability is very good also, at the same time reduce the human error, improve accuracy test results.carbon activated company   The adsorption capacity of activated carbon on each gas (unit: mL /cm3):H2, O2, N2, CI2, CO2 4.5, 35, 11, 494, 97 The main factors affecting the adsorption of activated carbon ① the nature of activated carbon adsorbent 
The role of activated carbon in the pharmaceutical industry92022-03-21 00:11:34
Because of these pores, especially the micropores provide a large surface area. The pore volume of activated carbon micropores is generally only 0.25-0.9mL/g, the number of pores is about 1020 lg, and the surface area of all micropores is about 500-1500m2/g, which is usually measured by the BET method, and it is also said to be as high as 3500-5000 m2/g. Activated carbon almost more than 95% of the surface area is in the micropore, so in addition to some macromolecules can not enter, micropore is an important factor to determine the adsorption performance of activated carbon. The pore volume of mesopores is generally about 0.02-1.0 MLLg, and the surface area can be up to several hundred square meters, generally only about 5% of the total activated carbon silkworm species.activated charcoal wholesale australia  Its function can adsorb steam, and can provide a channel for adsorbent to enter the micropore, and can directly adsorb larger molecules. The pore volume of the macropore is generally about 0.2-0.5mL /g, and the surface area is only about 0.5-2m2 /g. Its role is to make the adsorbate molecules quickly penetrate into the smaller pores inside the activated carbon.https://www.dxdcarbon.com/  : as a catalytic carrier, the catalyst is often a small amount of precipitation in the micropore, mostly precipitation in the macropore and mesopore. The surface area of the activated carbon should include the inner surface area and the outer surface area. In fact, the adsorption properties mainly come to the inner surface area of the white Li large, so it can not be mistaken for: the activated carbon grinding and grinding will significantly improve the surface area to improve the adsorption force. Many adsorbations are recursive physical adsorption, that is, the adsorbed matter is a fluid, which is adsorbed by activated carbon at a certain temperature and pressure. At high temperature and low pressure, the adsorbed matter desorbs out, and the inner surface of activated carbon returns to its original state. This is a widely used physical adsorption, also known as van der Waals adsorption academically. 
The role of activated carbon in the pharmaceutical industry02022-01-17 23:25:13
1. Combined with Zeta potential, sedimentation experiment, viscosity measurement and other methods, the influence of various dispersants on CEO and slurry suspension effect was studied. The results showed that the formula with good stability was the appropriate concentration of mixed dispersant (NAP +SBN) or (NAP +PAM+SBN).www.chinactivecarbon.com   2. The removal rate of CEOZ slurry prepared with mixed dispersant (NAP +PAM+SBN) in the processing of K9 glass by MASJP was higher than that of other mixed dispersants. gold adsorption on activated carbon  By comparing the processing effect of MASJP with and without mixed additives, it is found that the processing effect of MASJP with mixed additives (NAP +PAM+SBN) has higher surface quality, which can significantly reduce the interface area between the polished area and the unpolished surface and increase the smooth surface as much as possible.3. Combining online observation and single factor method, the formation process of the surface features of the polished area was studied. The experimental results showed that the surface morphology of the polished area showed a W-shaped bowl structure in the vertical jet machining, and an eccentric bowl structure in the crescent shape in the oblique jet machining.Compared with the abrasive water jet machining effect, it is found that the W shape and crescent shape characteristics of the polishing region of MASJP are relatively flat, the smooth surface is larger and the surface quality is higher. 4. When applying nozzle with different outlet shapes in MASJP, it is found that the fluid ejected from the cylindrical nozzle flows out along the direction of the jet and does not disperse. The processing area of the fan-shaped nozzle is large, the polishing area is approximately a rectangle, and the removal depth near the nozzle is larger.Hollow conical nozzle processing finished parts, the polishing area formed a hollow circle, the central part of the removal of less, the circumference of the removal of deep;The removal depth of the polishing area decreases gradually from the center to the circumference after the finished piece is processed by the solid conical nozzle. 5, the workpiece surface profile and material removal depth with the selection of polishing slurry composition changes.With the increase of abrasive concentration, the material removal depth increases, which is roughly in a proportional relationship.With the increase of abrasive particle size, the material removal depth also increases. 
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 industry02021-12-27 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 industry02022-01-17 23:32:14
Acid-base modification is to use acid, alkali and other substances to treat activated carbon, according to the actual need to adjust the surface functional groups of activated carbon, make it change, improve its ability of adsorption of metal ions, so as to achieve the desired adsorption effect.Acid-base modification of activated carbon is usually carried out to improve the adsorption effect of activated carbon on metal ions represented by copper ions. The commonly used modifiers include HC1, NaOH and citrate 3.It was found that by acid-base modification of common coal activated carbon, the ash content of the activated carbon could be greatly reduced and the specific surface area of the activated carbon could be increased www.powdered-activated-carbon.com  Electrochemical modification is to change the electrical and chemical properties of activated carbon surface by using micro electric field, so as to improve the adsorption selectivity and performance.It does not need to add chemical agents, does not need to heat, does not cause pollution to the environment, low energy consumption, only a few hundred millivolts, easy to operate.The results show that the adsorption equilibrium of activated carbon is dependent on the electric potential: the adsorption amount of activated carbon increases with the increase of the potential, and the adsorption speed is accelerated;Arpolarity polarization is beneficial to the adsorption of chloroform by activated carbon, while cathodic polarization inhibits the adsorption of chloroform by activated carbon 3-341]. Activated carbon heteroatom carrier and compound modificationActivated carbon has very high stability and good activity, these two basic properties become the activated carbon as a catalyst or catalyst carrier conditions.By introducing certain heteroatoms and compounds on the surface of activated carbon by liquid phase deposition, the adsorption performance of activated carbon can be increased by using the binding effect between these substances and adsorbents.compounds, which has the advantages of increasing the reaction rate and increasing the adsorption capacity.Yang Quanhong et al. 'Using FESO;Activated carbon material was modified. imagitarium activated carbon pellets 

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