The most common problem in hydrogenation catalysis is that the reaction is slow, or even stops, and the catalyst must be filtered out and the filtrate replenished with new catalyst to continue the reaction.

Catalysis plays a very important role in the progress of human civilization and the development of the world economy. It is widely used in energy, chemical, food, pharmaceutical and electronic industries because of its ability to transform raw materials into high value-added chemical products and fuels in an efficient, green and economical way. Currently, catalysis is used in more than 90% of the world's chemical production processes.

I believe that with the popularization of chemistry, more and more people will understand the truth that it is due to the rapid development of chemical industry technology that we see more and more high-quality skin care products, and people no longer believe in such ignorant and uninteresting advertisements as "natural, no additives" and "I just hate chemistry".r

Most of the hydrogenation reactions are exothermic, and most of them are carried out at high temperatures. The hydrogen and most of the materials used have the danger of ignition and explosion, and some of the materials, products or intermediate products are toxic and corrosive. In case of leakage, reactor blockage and other failures, there is a great risk of fire and explosion. 

The first catalyst production plant in China was the catalyst department of Yongli Asia Plant, which was renamed as Nanjing Chemical Industry Company Catalyst Plant in 1959. In 1950, it started to produce AI type ammonia catalysts, C-2 type carbon monoxide high temperature conversion catalysts and VI type vanadium catalysts for sulfur dioxide oxidation, and then gradually completed the production of various catalysts for ammonia industry. By 1984, more than 40 units had produced catalysts for sulfuric acid, nitric acid and ammonia industries.

1、Definition of environmental protection catalysts Environmental protection catalysts are catalysts used to protect and improve the surrounding environment by treating toxic and hazardous substances in a direct or indirect way to make them harmless or reduce them. In a broad sense, the scope of envi