Benefiting from the rapid development of downstream industries, my country has become the world's largest producer of p-chlorotoluene. In addition to meeting the needs of the domestic market, the products are also exported to overseas markets.
p-Chlorotoluene, also known as 4-chlorotoluene, has the molecular formula C7H7Cl. The appearance of p-chlorotoluene is colorless and transparent liquid, with special odor, toxicity and irritation. p-Chlorotoluene is insoluble in water, soluble in organic solvents such as alcohol, ether, benzene, acetone, chloroform, etc. It is flammable, flammable in case of open flame, violently reacts in case of oxidizing agent, and may explode in airtight containers. Para-chlorotoluene is the most important product type among the three isomers of chlorotoluene.
The preparation methods of p-chlorotoluene mainly include toluene aromatic ring chlorination method, p-toluidine diazotization method and so on. Among them, the toluene aromatic ring chlorination method is the mainstream preparation process. It uses dry toluene as a raw material, adds a catalyst, introduces chlorine gas, performs a chlorination reaction under a certain temperature condition to obtain a product, and then undergoes a separation process to obtain p-chlorotoluene. The product of this method is a mixture of p-chlorotoluene and o-chlorotoluene. In the production process, there are differences in the output ratio of the two using different catalysts. The separation method can be rectification crystallization method, molecular sieve adsorption method, etc.
p-Chlorotoluene is mainly used in medicine, pesticides, dyes, solvents, organic synthesis and other fields. In the field of medicine, p-chlorotoluene can be used to produce clomezadone tablets, pyrimethamine, clotrimide, etc.; in the field of pesticides, it can be used to produce insecticides, herbicides, fungicides, etc. In the field of dyes, it can be used to produce acid blue 90, CI disperse blue 109, etc.; in the field of organic synthesis, it can be used to prepare p-chlorobenzaldehyde, p-chlorobenzoic acid, p-chlorobenzonitrile, p-chlorobenzoyl chloride etc.; can also be used as rubber, resin solvent.
According to the "2021-2025 China's p-chlorotoluene industry market development status and production and sales data analysis report" released by Xinsijie Industry Research Center, p-chlorotoluene can undergo various reactions to prepare a variety of fine chemical products, and its derivatives It is the most demanded and most widely used product type among the chlorotoluene isomers. Benefiting from the rapid development of downstream industries, my country has become the world's largest producer of p-chlorotoluene. In addition to meeting the needs of the domestic market, the products are also exported to overseas markets. It is estimated that from 2020 to 2025, the global p-chlorotoluene market will grow at a growth rate of about 4.0%, and my country's p-chlorotoluene industry has a good development prospect.
Most of my country's p-chlorotoluene enterprises produce downstream products. Therefore, in my country's p-chlorotoluene production, the proportion of self-use by enterprises is high, and the proportion of export sales is small.
According to industry analysts from Xinsijie, p-chlorotoluene is an important fine chemical raw material and fine chemical intermediate. It is widely used in medicine, pesticides, dyes and other fields, and the market demand continues to grow.
Post time: Mar-30-2022