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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

Applications of 4,4'-Methylenedianiline

4,4'-Methylenedianiline is a colorless or white solid. 4,4'-Methylenedianiline is produced on industrial scale as a precursor to polyurethanes.

Nov 22,2019  Catalyst and Auxiliary

Applications of Vinyl Q resin

Vinyl Q resins are clear reinforcing additives for addition cure elastomers. The melting point is < -60 °C. The boiling point is 143 °C. The density is 1.05 g/cm3.The refractive index is 1.405.

Nov 21,2019  Catalyst and Auxiliary

(1S,2R)-cis-2-Aminocyclopentanol hydrochloride- Reaction / Application on Synthetic Works

(1S,2R)-cis-2-Aminocyclopentanol hydrochloride is an important organic chiral building block, which is used for asymmetric synthesis.

Nov 20,2019  Catalyst and Auxiliary

(S)-(+)-α,α-Diphenyl-2-pyrrolidinemethanol- Reaction / Application on synthetic works

(S)-(-)-α,α-Diphenyl-2-pyrrolidinemethanol (DPPM) is a bifunctional organocatalyst, which could be used as a catalyst and organic synthesis reagent.

Nov 20,2019  Catalyst and Auxiliary

18-Crown-6 - Reaction / Application on Synthetic Works

18-crown-6 (18C6, 18c6, [18]-Crown-6) functions as a ligand for some metal cations, it can solubilize metal salts, particularly potassium salts, in nonpolar and dipolar aprotic solvents. Thus, it is w

Nov 20,2019  Catalyst and Auxiliary

2,4,6-trimethylbenzoylphenylphosphinic acid ethyl ester- Reaction / Application on synthetic works

2,4,6-Trimethylbenzoylphenylphosphinic acid ethyl ester is a photoinitiator for UV curable coatings. It is also an important organic intermediate to synthetize substituted benzoylphenylphosphinic prod

Nov 19,2019  Catalyst and Auxiliary

Applications of Diethyltoluenediamine

Diethyltoluenediamine is light yellow to amber transparent liquid. Diethyltoluenediamine isan excellent and low cost chain extender for elastomeric polyurethanes (PU) and also a curing agent for epoxi

Nov 15,2019  Catalyst and Auxiliary

Applications of Antioxidant 1010

Antioxidant 1010 is a high molecular weight hindered sterically phenolic antioxidant; very low volatility; food contact approval.Antioxidant 1010 is white powder, odorless and no pollution.

Nov 15,2019  Catalyst and Auxiliary

4-Hydroxy-2,2,6,6-tetramethyl-piperidinooxy- Reaction / Application on synthetic works

4-Hydroxy-2,2,6,6-tetramethyl-piperidinooxy is a heterocyclic compound, which is a 4-substituted 2,2,6,6-tetramethylpiperidyl-1-oxy (TEMPO) derivative. Like the related TEMPO, it is used as a catalyst

Nov 8,2019  Catalyst and Auxiliary

Butylchlorodihydroxytin - Reaction / Application on synthetic works

Butylchlorodihydroxytin is an important Tin-based catalyst to synthetize polymers and organotin substituted products.

Nov 8,2019  Catalyst and Auxiliary
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