Method for preparing hydroxyethyl (meth) acrylate

US9845281B2 · kind B2 · utility

Assignee

• WANHUA CHEMICAL GROUP CO., LTD.

Inventors

• Junping Li · Shanghai, CN
• Haibo Chen · Shanghai, CN
• Lichang Zhang · Yantai, CN
• Chunxian Cui · Yantai, CN
• Yuan Li · Shandong, CN
• Weiqi Hua · Yantai, CN
• Jiansheng Ding · Yantai, CN
• Junhua Zhang · Chesterfield, US
• Zhaokun Cheng · Yantai, CN

Key dates

• Filing date: Jul 29, 2014
• Grant date: Dec 19, 2017
• Expiry date: Jul 29, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F220/06
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Hydroxyethyl (methyl)acrylate is prepared by a process of a combination of a three-stage tubular reactor and a tower reactor, wherein, firstly, a catalyst, a polymerization inhibitor and (methyl) acrylic acid are mixed until the solids are dissolved, then mixed with a part of ethylene oxide and thereafter enter into a first tubular reactor for a reaction, a reaction liquid flowing out from the first tubular reactor is mixed with a certain amount of ethylene oxide and enters into a second tubular reactor for a reaction, a reaction liquid flowing out from the second tubular reactor is then mixed with a certain amount of ethylene oxide and thereafter enters into a third tubular reactor, and a reaction liquid flowing out from the third tubular reactor is then passed through a stage of an adiabatic tower reactor and aged such that a product liquid is obtained from extraction.