Catalysts And Auxiliaries
Copper Sulphate
Catalysts And Auxiliaries
A catalyst is a substance that changes the rate of reaction in a chemical reaction while its own composition and quality remain unchanged after the reaction. A catalyst that speeds up a reaction is called a positive catalyst, and one that slows it down is called a negative catalyst or retardant. The general term catalyst refers to positive catalysts. This type of catalyst is used more often in industry, especially in organic chemistry, and is of great significance.
There are many kinds of catalysts, according to the catalyst and the phase state of the reaction system, there are homogeneous and non-homogeneous two types of catalysts. In order to improve the catalytic efficiency, pure metal catalysts are made into alloy catalysts and composite catalysts. Composite catalyst consists of main catalyst and co-catalyst.
Catalysts And Auxiliaries
Auxiliaries refer to the auxiliary chemicals that are usually added in agricultural and industrial production, especially in chemical production, in order to improve the production process, increase product quality and yield, or to give the product some unique application properties. It is a large class of important auxiliary raw materials in chemical production, can give the product with special properties, improve the use of finished products; can accelerate the speed of chemical reaction, improve product yield; can save raw materials, improve processing efficiency.
Auxiliaries are widely used in the chemical industry, especially in organic synthesis, synthetic materials, post-processing and petroleum refining, pesticides, pharmaceuticals, dyes, coatings and other industrial sectors. According to the use can be divided into synthetic auxiliaries and processing auxiliaries.
