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06 Dec , 2024

Do You Know the Application of Lindlar Catalyst?

Lindela catalyst is a unique supported palladium hydrogenation catalyst, mainly used for selective catalytic hydrogenation reactions. It is made of palladium adsorbed on a carrier and a small amount of inhibitor added. Common carriers are CaCO3 and BaSO4, and inhibitors include lead salts, bismuth salts or lead-bismuth mixtures. Lindlar catalyst has a highly selective hydrogenation effect on acetylenic bonds, and can only hydrogenate acetylenic bonds during the hydrogenation process without affecting other polyene bonds. Application areas Pharmaceutical synthesis: Lindlar catalyst is widely used in drug synthesis. For example, it is used to prepare 25-hydroxycholesterol, which is an important precursor for the generation of 1,25-(OH)2D3, which is essential for bone formation and calcification. In addition, the catalyst is also used for the hydrogenation of vitamin A intermediates, selectively hydrogenating only acetylenic bonds without affecting other polyene bonds. Species and flavors synthesis: In the synthesis of spices and flavors, the highly selective hydrogenation of Lindlar catalyst enables it to efficiently synthesize specific flavor ingredients to meet the needs of different products. Environmental protection: Lindlar’s catalyst recovery technology can effectively recover valuable resources from spent catalysts, and therefore has been widely used in the environmental protection field4.
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04 Jul , 2024

Features of Activated Carbon Adsorption Steam Recovery System

The activated carbon adsorption steam desorption condensation recovery system is an organic waste gas treatment system that combines the adsorption method and the condensation method. The activated carbon adsorption + steam desorption condensation recovery system gives full play to the advantages of both methods, has high purification efficiency, and transforms the disadvantages of the adsorption method and the condensation method into a usable one, regenerates the adsorbent, and uses low-temperature water vapor for desorption. The activity of the adsorbent is restored, and the desorbed organic matter is recycled to achieve the purpose of purifying the waste gas. Features of activated carbon adsorption steam recovery system: (1) High solvent recovery and utilization value. (2) Waste gas treatment efficiency reaches 90%. (3) Steam desorption efficiency reaches 80%. (4) Low system temperature reduces safety hazards. (5) Can be operated intermittently or continuously. (6) Activated carbon regeneration saves operating costs. The above introduction to the activated carbon adsorption steam desorption condensation recovery system is expected to be helpful to you. If you need an activated carbon adsorption steam desorption condensation recovery system for waste gas treatment, you can consult Tianhaoyang Environmental Protection at any time to provide you with waste gas treatment solutions and...
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20 Dec , 2024

The Working Principle Of Activated Carbon Decolorization

The working principle of activated carbon decolorization is mainly based on its strong adsorption capacity, including physical adsorption and chemical adsorption. Due to its large specific surface area and porous structure, activated carbon can adsorb and remove impurities in the solution, thereby making the solution transparent or reducing the color. The main working principles are as follows: Physical adsorption: The interaction force between activated carbon and impurities is mainly van der Waals force, etc. This adsorption is reversible and can be achieved by changing temperature, pressure and concentration. Chemical adsorption: After activated carbon adsorbs impurity molecules, chemical reactions will occur to form chemical bonds. This adsorption is irreversible and can be promoted by changing the pH value of the solution or adding appropriate chemical reagents. Selective adsorption: Activated carbon can selectively adsorb pigments to varying degrees according to molecular size, shape and polarity.
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19 Jul , 2024

Application of Activated Carbon in PSA Adsorption

The application of activated carbon in pressure swing adsorption is mainly reflected in its wide application as an adsorbent in natural gas concentration research, hydrogen purification and other gas treatment processes. Natural gas concentration research: Activated carbon is widely used as an adsorbent in natural gas concentration research because its surface is hydrophobic and the adsorption of non-polar molecule CH4 is less affected by water. In addition, activated carbon also has the advantages of large specific surface area, developed pore structure, stable chemical properties, acid and alkali resistance, high mechanical strength, easy regeneration and low cost, making it an ideal natural gas concentration adsorption material1. Hydrogen purification: In the process of hydrogen purification, activated carbon is used as an adsorbent, and pressure swing adsorption (PSA) technology can be used to achieve efficient purification of hydrogen. PSA technology has the characteristics of high purity, low energy consumption and high degree of automation, and is the main separation technology for hydrogen production at present. Optimizing the pressure swing adsorption process and improving the adsorbent are the keys to the further development of PSA hydrogen production, and activated carbon plays an important role in the hydrogen purification process due to its excellent adsorption...
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10 Jan , 2025

How Does Activated Carbon Remove Ozone?

There are mainly several methods of removing ozone by activated carbon: Activated carbon adsorption method: Activated carbon has good adsorption properties and can adsorb ozone molecules, making them stay on the surface of activated carbon, and reduce the ozone concentration through physical adsorption. This method is suitable for low-concentration ozone environments, but has limited effect in high-concentration environments, and activated carbon needs to be replaced or regenerated regularly. Catalytic decomposition method: The decomposition of ozone into oxygen is accelerated by the action of a catalyst. This method is carried out at room temperature and has the advantages of high efficiency, stability, safety and economy. It is currently an ideal method. Thermal decomposition method: In a high-concentration ozone environment, ozone can be converted into oxygen through thermal decomposition or combustion by heating the gas to about 400°C. Although this method is effective, it consumes a lot of energy and is costly. Electromagnetic wave radiation decomposition method: Use ultraviolet or near-infrared rays to irradiate ozone to promote its decomposition. This method requires specific equipment and technical support. ‌Pharmaceutical liquid absorption method‌: Use chemical reagents such as sodium thiosulfate or sodium sulfite to absorb ozone, but the treated waste liquid needs to be...
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07 Aug , 2024

What are Main Factors That Affect the Quality of Humic Acid?

The quality of humic acid is affected by many factors, mainly from its source, processing process and storage conditions. Here are some of the main influencing factors: Source of raw materials: Soil type: The content and characteristics of humic acid in different soil types will vary. Plant species: Different plant residues will lead to differences in the composition and quality of humic acid. Microbial activity: Microbial community: The type and number of microorganisms involved in the formation of humic acid will affect its quality. Degradation rate: The rate of degradation of organic matter by microorganisms will also affect the formation and characteristics of humic acid. Environmental conditions: Temperature: Temperature changes will affect microbial activity and the decomposition rate of organic matter. Humidity: Suitable humidity is conducive to microbial activity and the accumulation of humic acid. Oxygen supply: Oxidizing or reducing environments will change the chemical properties of humic acid. Chemical factors: pH: The acidity and alkalinity of the soil or environment will affect the solubility and structure of humic acid. Mineral content: Metal ions such as iron and aluminum may bind to humic acid, affecting its structure and availability. Time factors: Humification time: The length of time that organic matter...
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