The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 30, 2015
Filed:
Dec. 20, 2012
Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, CN;
Jing Chen, Lanzhou, CN;
Heyuan Song, Lanzhou, CN;
Chungu Xia, Lanzhou, CN;
Meirong Kang, Lanzhou, CN;
Ronghua Jin, Lanzhou, CN;
Abstract
A reaction system and method for producing polyoxymethylene dialkyl ethers (RO(CHO)R, n=1-8) by continuous acetalation of formaldehyde and aliphatic alcohol in the presence of an acid ionic liquid catalyst. The reaction system includes an acetalation reaction unit, a product separation unit, and a catalyst regeneration unit. The recyclable material and catalyst are separated by combining extraction and rectification, and a recovery rate of more than 99% for the catalyst is achieved. Water, as the byproduct, is separated from the reaction system by destroying the azeotrope of water, alcohol, aldehyde, and RO(CHO)R, so that the product separation and catalyst regeneration are facilitated and the catalytic cycle is achieved.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile