• 专利标题:   Synthesizing diethyl oxalate comprises e.g. placing oxalic acid, ethanol, toluene and catalytic adsorption solid material into the reactor and mixing, gradually heating the reactor from room temperature, and heating the esterification mixture.
  • 专利号:   CN116217389-A
  • 发明人:   ZHANG X
  • 专利权人:   FUJIAN SHAXIAN QINGZHOU DAILY USE CHEM
  • 国际专利分类:   B01J020/10, B01J020/20, B01J020/22, B01J020/30, B01J031/02, C07C067/08, C07C069/36
  • 专利详细信息:   CN116217389-A 06 Jun 2023 C07C-067/08 202355 Chinese
  • 申请详细信息:   CN116217389-A CN10276657 21 Mar 2023
  • 优先权号:   CN10276657

▎ 摘  要

NOVELTY - Synthesizing diethyl oxalate comprises (i) placing oxalic acid, ethanol, toluene and catalytic adsorption solid material into the reactor and mixing, (ii) gradually heating the reactor from room temperature to 105-108°C, and maintaining the temperature constant until the dehydration is completed to obtain the esterification mixture, and (iii) heating the esterification mixture to 128-130°C, removing the toluene, then lowering the temperature to separate diethyl oxalate and catalytic adsorption solid material. USE - The method is useful for synthesizing diethyl oxalate. ADVANTAGE - The method: reduces the preparation difficulty of diethyl oxalate; simplifies the process; and improves the preparation efficiency.