Synthesis And Application Of Pesticide Intermediates
Pesticide intermediates are fine chemicals. Pesticide intermediates are processed and produced from agricultural raw materials. It is an intermediate medium that combines two or more substances. In pesticides, it can be understood as a synergist, which is an intermediate material for the production of pesticides. With the development of new pesticides in the country, the development of some special intermediates has been rapid, such as fluorine-containing, cyano-containing, and heterocyclic intermediates. Among them, the more prominent are pyrethroid pesticide intermediates, such as chrysanthemum acid and dichloride. Chrysanthemum acid, butyric acid, ether aldehyde, allyl alcohol ketone.
my country is the world's main producer and supplier of pesticide fine chemical intermediates, and its development prospects are very broad. Among them, 1,2,4-trichlorobenzene, o-cresol, catechol, and nonylphenol are the most important pesticide intermediates. 1,2,4-Trichlorobenzene is mainly used in the synthesis of pesticides dicamba, acaricide, sodium pentachlorophenol, pentachlorophenol, etc.; o-cresol is mainly used in the synthesis of high-efficiency herbicides; catechol is important Intermediates of new low-toxic and high-efficiency carbamate pesticides carbamate, carbofuran, propoxur, and dimethocarb; nonylphenol is a multi-purpose non-ionic surfactant, widely used in pesticide emulsifiers; m-cresol is mainly used For synthetic pesticides and insecticides.
In recent years, due to the gradual strengthening of the development and application of its downstream products at home and abroad, there is a strong demand for high-purity 1,2,4-trichlorobenzene in the international market. In addition, due to the prohibition and restriction of the use of lindane, in developed countries and regions abroad, traditional trichlorobenzene raw materials are decreasing, and the production of organochlorine products is also gradually decreasing. This has also led to the current global trichlorobenzene, especially high-purity 1 , The supply of 2,4-trichlorobenzene is tight. All these factors provide a good opportunity for the production and development of 1,2,4-trichlorobenzene in my country. The new carbamate insecticides produced by catechol, such as carbofuran, propoxur, dimethocarb, etc., are recommended by the World Health Organization as a household pest and storage pest control agent due to low toxicity and good effect Market demand will gradually increase. Nonylphenol is the largest product among alkylphenols. It has good functions of decontamination, wetting and penetration, dispersion, solubilization and emulsification. It is widely used in pesticide emulsifiers and is the most important product in the petrochemical industry and organic synthesis industry. Important intermediate. The market demand for m-cresol has basically maintained an average annual growth rate of 8% to 10%, and the development rate has been stable. In addition, because fine chemicals have the advantages of functionalization, high performance, special flowers, and high value-added, it is a low-carbon, environmentally friendly process, and it is a way to achieve the energy-saving and emission-reduction goals proposed by the country and develop a low-carbon economy. The overall path, the state's attention to it has greatly increased. It is also very beneficial to the development of the fine chemical pesticide intermediate industry.
The upstream of pesticide intermediates are inorganic raw materials such as yellow phosphorus and liquid chlorine, and basic organic raw materials such as methanol and triphenyl, which are used in agricultural, forestry and animal husbandry production and sanitation after being made into pesticide technical. Agricultural intermediates are located in the middle of the industrial chain and belong to the fine chemical industry. They rely heavily on technology, invest in R&D, have a long cycle, and have high risks and low success rates.
Therefore, my country's fine chemical pesticide intermediate industry has a very good development prospect under the dual beneficial influence of increasing market demand and government encouragement of development.
