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:
Jul. 11, 2006
Filed:
Jan. 20, 2004
Hari Babu Sunkara, Hockessin, DE (US);
Ernest Keith Andrew Marchildon, Kingston, CA;
Howard Chung-ho NG, Kingston, CA;
Leo E. Manzer, Wilmington, DE (US);
Hari Babu Sunkara, Hockessin, DE (US);
Ernest Keith Andrew Marchildon, Kingston, CA;
Howard Chung-Ho Ng, Kingston, CA;
Leo E. Manzer, Wilmington, DE (US);
E. I. du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
The invention is a continuous process for the preparation of polytrimethylene ether glycol from 1,3-propanediol reactant. In addition, the invention is directed to a continuous multi-stage process comprising reacting at least one reactant in a liquid phase in an up-flow column reactor, and forming a gas or vapor phase by-product wherein the gas or vapor phase by-product is continuously removed at the top and at least one intermediate stage.