Method for preparing methyl formate and coproducing dimethyl ether

US9938227B2 · kind B2 · utility

Assignee

• DALIAN INSTITUTE OF CHEMICAL PHYSICS, CHINESE ACADEMY OF SCIENCES · CN

Inventors

• Youming Ni · Dalian, CN
• Wenliang Zhu · Dalian, CN
• Yong Liu · Dalian, CN
• Hongchao Liu · 东风镇, CN
• Zhongmin Liu · 东风镇, CN
• Lina Li · 唐家房镇, CN
• Shiping Liu · Columbia, US
• Hui Zhou · Dalian, CN

Key dates

• Filing date: Nov 17, 2014
• Grant date: Apr 10, 2018
• Expiry date: Nov 17, 2034

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2231/70
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Method for preparing methyl formate and coproducing dimethyl ether by reacting a formaldehyde and methanol raw material (molar ratio range of 1:4 to 1:0.05) in a First Reaction Region at ranges from 50° C. to 100° C. with Catalyst A resulting in post-reaction material separated into Constituent I. Reacting Constituent I in a Second Reaction Region at ranges from 50° C. to 200° C. and from 0.1 MPa to 10 MPa with Catalyst B resulting in post-reaction material, which is separated into methyl formate, dimethyl ether and Constituent II. At least 1% of dimethyl ether is product, and recycling the rest to the First Reaction Region. Constituent II is recycled to the Second Reaction Region. Each component is gaseous phase and/or liquid phase, independently. The method shows long catalyst life, mild reaction condition, high utilization ratio of raw materials, continuous production and large scale industrial application potential.