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Catalyst and Auxiliary

The catalyst can change the reaction rate in the chemical reaction, and the composition and the quality of the catalyst can be kept constant after the reaction. The catalyst that accelerates the reaction is called the positive catalyst, slows down called Negative Catalyst or slow agent. It said catalyst is a positive catalyst for the general correction. This kind of catalyst in the industry, especially the organic chemical industry used more, and has great significance, Such as sulfuric acid prepared by contacting, ammonia, hydrolysis of the ester and polysaccharide, Oil Hydrogenation, etc. Commonly used catalysts are mainly metal, metal oxide and inorganic acid. If the catalyst is solid, the substance of the reaction is gas, to form a multi-phase catalytic reaction, this catalyst, sometimes called catalyst or contact agent. The catalyst is generally selective, it can only make a reaction or a certain type of reaction to speed up. But some reaction can be used for a variety of catalysts, such as the hydrogenation reaction can often be platinum, palladium, nickel, should be carefully chosen. In the catalytic reaction, the catalyst is often added cocatalyst known to enhance catalytic action of the catalyst. For example, iron is a catalyst in ammonia industry, adding a small amount of potassium and aluminum can enhance the catalytic effect of iron. The composition and weight of the catalyst and cocatalyst cannot change before and after the reaction. All of the above are inorganic catalysts. The enzyme is a protein, is very important organic catalyst. There are many kinds of catalyst, catalyst and reaction system according to the phase of the classification, there are two types of homogeneous and heterogeneous catalysts. Heterogeneous catalysts most widely used, there are 3 kinds of gas, liquid and solid state, the variety and application of solid catalyst. The solid catalyst, which is made of metal (nickel, platinum, palladium, chromium, cobalt, titanium, va

Synthesis of Bis(cyclopentadienyl)zirconium dichloride

Bis(cyclopentadienyl)zirconium dichloride is the main catalyst of the Kaminsky type catalytic system.

Jun 21,2022  Catalyst and Auxiliary

Polyhexamethylene biguanide hydrochloride---PHMB

PHMB is recognized as the safest and most efficient broad-spectrum antibacterial agent in the 21st century. It is colorless and odorless, with low antibacterial concentration, broad-spectrum and low t

Jun 21,2022  Catalyst and Auxiliary

Preparation of Titanocene dichloride

Titanocene dichloride is mainly used as a catalyst for olefin copolymerization and homopolymerization.

Jun 17,2022  Catalyst and Auxiliary

Cuprous thiocyanate and production method

Cuprous thiocyanate (CuSCN, Cuprous Thiocyanate), marine organisms poisoning agent of new generation for people's exploitation, than Red copper oxide have toxicity distribute more stable, better effec

Jun 16,2022  Catalyst and Auxiliary

Zinc Acrylate Self-polishing Resin

SPZn-100 is an economical matrix resin product used for tin-free self-polishing paint, it is only suitable for copper-containing formulations and must be blended with CDP (Rosin).

Jun 15,2022  Catalyst and Auxiliary

Silyl Acrylate Self-polishing Resin

SPSi-100 is a high performance matrix resin product used for tin-free self-polishing paint, it is only suitable for copper-containing formulations .

Jun 15,2022  Catalyst and Auxiliary

Properties and health concerns of Polyvinyl chloride

Polyvinyl chloride (PVC, or vinyl) is used in a variety of applications in the building and construction, health care, electronics, automobile and other sectors, in products ranging from piping and si

Apr 24,2022  Catalyst and Auxiliary

Applications Polyvinylidene fluoride

Polyvinylidene fluoride or polyvinylidene difluoride (PVDF) is a highly nonreactive thermoplastic fluoropolymer produced by the polymerization of vinylidene difluoride.

Apr 19,2022  Catalyst and Auxiliary

Applications of Cellulose acetate

Cellulose acetate is used as a film base in photography, as a component in some adhesives, and as a frame material for eyeglasses; it is also used as a synthetic fiber and in the manufacture of cigare

Apr 14,2022  Catalyst and Auxiliary

Applications and Side effects of Carbomer

Carbomer is a term used for a series of polymers primarily made from acrylic acid. Carbomers are white, fluffy powders but are frequently used as gels in cosmetics and personal care products.

Apr 14,2022  Catalyst and Auxiliary
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