Introduction of Aniline Catalyst

Modified copper silica gel is an important chemical material with a wide range of applications. The following is a detailed introduction to modified copper silica gel:

I. Definition and Standard

Definition: Modified copper silica gel is a composite material made of copper-based particles and silica gel matrix modified by a specific process. It combines the catalytic activity of copper with the advantages of high specific surface area and high porosity of silica gel to form a catalyst with excellent catalytic performance.

Standard: The production and application of modified copper silica gel follows the industry standard HG/T 4828-2015, which was issued in July 2015 and officially implemented on January 1, 2016. The standard specifies the requirements, test methods, inspection rules, signs, labels, packaging, transportation and storage of modified copper silica gel.

II. Physical and chemical properties

Appearance: The appearance of modified copper silica gel is usually emerald green or blue-green microsphere particles. The specific color may vary depending on the production process and raw materials.

Particle size: Its particle size qualification rate (150μm～600μm) is usually not less than 90%, and there are also data showing that its external size particle size is between 30 and 100 meshes.

Bulk density: Bulk density is generally between 560 and 700g/L or 580 and 600kg/m³, and the specific value depends on the production process and the actual application requirements of the product.

Specific surface area and pore volume: Modified copper silica gel has a large specific surface area (350～450m²/g) and pore volume (0.65～0.75mL/g or 0.65～0.70cm³/g), which enables it to provide more active sites and reaction space in catalytic reactions.

3. Application field

Catalyst: Modified copper silica gel catalyst is mainly used in the reaction of nitrobenzene fluidized bed gas phase hydrogenation to aniline and o-, m-, p- and mixed nitrotoluene fluidized bed gas phase hydrogenation to o-, m-, p- and mixed toluidine. It has the advantages of high catalytic activity, high selectivity and high stability, and can significantly improve the reaction efficiency and product yield.

Desulfurizer: In addition, modified copper silica gel can also be used to remove sulfides in oil and natural gas, providing strong support for clean production in the energy industry.

IV. Preparation method

The preparation method of modified copper silica gel usually includes modifying the special silica gel, then impregnating it with copper components, and then drying, calcining and other processes to obtain the finished catalyst. During the preparation process, it is necessary to strictly control various process parameters to ensure the quality and performance of the product.

V. Safety information

Toxicity and irritation: The modified copper silica gel catalyst contains metallic copper, so it has certain toxicity and irritation. Personal protective equipment such as protective gloves and glasses should be worn during operation to prevent the catalyst from contacting the skin and eyes.

Emergency treatment: In case of accidental contact or leakage, it should be immediately rinsed with plenty of clean water and medical treatment.

In summary, modified copper silica gel is a chemical material with excellent catalytic performance and broad application prospects. In the future development, with the continuous improvement of production technology and the continuous expansion of application fields, its market demand will continue to grow.