Circulating methanol separation device and method in alcoholysis intermediate production process

The invention discloses a circulating methanol separation device in an alcoholysis intermediate production process. The circulating methanol separation device comprises a methanol refining unit, an aniline recovery unit and a vacuum unit. Product feed liquid obtained in the alcoholysis intermediate production process is rectified in a methanol refining tower to obtain crude methanol, the crude methanol is subjected to rectification deamination and dehydration and then returns to a reaction system, and aniline is recovered at the same time. According to the method, methanol is effectively purified meeting the process requirements, the problems of low yield of heat-sensitive products and overpressure of a reactor caused by low methanol purity are solved, and long-time continuous and stable operation of heat-sensitive product-containing feed liquid separation in the alcoholysis intermediate production process is met; and the production efficiency is improved. 本发明公开的醇解中间体生产过程中循环甲醇分离装置，包括甲醇精制单元和苯胺回收单元以及真空机组。本发明对醇解