Method for synthesizing butyl hydroxy anisd

• Main Authors: ZHOU ZHONGPING, ZHU YUXIANG, WU XIAOLE, ZHANG QIUHUA
• Format: Patent
• Language: Chinese; English
• Published: 24.07.2018
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention discloses a method for synthesizing butyl hydroxy anisd (BHA). The BHA is synthesized by taking tert-Butylhydroquinone (TBHQ) and dimethyl carbonate (DMC) as raw materials and taking self-made double alkali metals as catalysts. The conversion ratio of the TBHQ is 28-40%, the selectivity of the produced target product 3-tert-butyl-4-hydroxy anisole (3-BHA) is 84-100%, and when the catalyst is repeatedly used in five batches, the catalytic activity is not reduced. The method disclosed by the invention has the advantages that the BHA prepared by catalysis of the self-made double alkali metal catalyst is high in selectivity, the catalyst can be simply filtered and repeatedly used, and the used raw material dimethyl carbonate is a green reagent without any environmental pollution.Moreover, the unreacted TBHQ and dimethyl carbonate can be directly recycled for the next reaction, the amount of reaction by-products is small, the reaction conditions are relatively mild, the synthesizing cost is low, and