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:
Sep. 19, 1978
Filed:
Aug. 05, 1977
Applicant:
Inventor:
Melvin Charles Baker, Youngstown, NY (US);
Assignee:
E.I. DuPont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
26034611 ; 2606 / ;
Abstract
A process for removing poly(tetramethylene ether) glycol from dilute aqueous acidic effluent streams thereof comprising the steps of (1) maintaining the stream in the liquid phase at a temperature above about 150.degree. C for a period of at least about 15 minutes and (2) removing tetrahydrofuran therefrom.