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一、前言间甲酚是生产高效、低毒、低残毒农药杀螟松、倍硫磷、速灭威及二氯苯醚菊酯的主要原料;也是合成人造麝香、树酯、增塑剂、抗焦剂、彩色电影胶片显色剂等一系列化工产品的中间体。它在国内的需要量将是很大的,但目前尚无成批量生产。国外间甲酚的工业生产有异丙基甲苯法和甲苯磺化法。前者技术复杂,建厂投资大,不宜小吨位生产;后者工艺简单成熟,适于中小规模生产,目前仍为生产甲酚的主要方法之一,世界上用此法生产的约4万吨/年。甲苯磺化法制造间甲酚的关键是磺化异构转位与碱熔两个步骤。
First, the introduction of m-cresol is the production of high efficiency, low toxicity, low residues of pesticides fenitrothion, fenthion, speed off Wei and permethrin main raw materials; synthetic synthetic musk, resin, plasticizers, Anti-coke, color film film developer and a series of chemical intermediates. Its domestic demand will be great, but there is no mass production yet. Foreign cresol industrial production with isopropyl toluene method and toluene sulfonation method. The former is complicated in technology and the investment in construction is large and should not be produced in small tonnages. The latter is simple and mature and suitable for medium and small-scale production. Currently, it is still one of the main methods for producing cresol. About 40,000 tons / year. Toluene sulfonation method of m-cresol key is sulfonated isomerization transposition and alkali melting two steps.