Process method for synthesizing electronic grade acetic acid 2, 2-difluoroethyl ester

• Main Authors: HOU JIAXIANG, LI GUANGKE, NIU LEILEI, SHI LEI, FAN XINGJIA, LIU PEI, YAN ZIZHEN
• Format: Patent
• Language: Chinese; English
• Published: 31.03.2023
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY

The invention discloses a process method for synthesizing electronic grade acetic acid 2, 2-difluoroethyl ester, which comprises the following process steps: S1, pre-reacting raw materials containing acetic acid and 2, 2-difluoroethanol in a pre-reactor to obtain a liquid mixture; s2, enabling the liquid mixture and water to enter a rectifying tower 1 for catalytic reaction, extracting tower top distillate, and standing to separate a water phase I and an ester phase I; s3, feeding the water phase I into a rectifying tower 2 for further rectification, extracting from the tower top, standing and separating to obtain a water phase II and an ester phase II; the water phase II circularly enters the rectifying tower 2; and S4, carrying out alkali washing deacidification and dehydration on the ester phases obtained in the steps S2 and S3, then feeding the ester phases into a rectifying tower 4 for rectification and purification, and carrying out side extraction to obtain the electronic-grade acetic acid 2, 2-difluor