52106-86-2Relevant articles and documents
Method for synthesizing high-content 2-methyl-4-chloric acid and sodium salt
-
Paragraph 0030-0053, (2017/02/28)
The invention discloses a method for synthesizing high-content 2-methyl-4-chloric acid and sodium salt. The method comprises the following steps: synthesizing 4-chloro-methylphenol from sulfuryl chloride by using a chlorination process, carrying out condensation with sodium chloroacetate, and drying filter cake, thereby obtaining sodium salt directly, or directly acidifying the filter cake, thereby obtaining 98% 2-methyl-4-chloric acid. Hydrochloric acid generated in the chlorination process can be recycled to an acidification procedure, and generated sulfur dioxide is further reacted with chlorine to prepare sulfuryl chloride which can be recycled for a chlorination procedure, so that a closed circulation green production process can be formed, and the product quality can be relatively greatly improved. According to the method, the cost is relatively low and the pollution is relatively slight, the equipment utilization rate is greatly increased, meanwhile the problem that the content is low if o-cresol is chloridized with chlorine can be solved, and a basis is made for producing 2-methyl-4-chloric acid through chlorination and condensation in sequence.