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:
Dec. 15, 1981
Filed:
Jan. 15, 1981
Applicant:
Inventors:
Arthur S Chu, E. Amherst, NY (US);
Frank Scarcello, Westfalls, NY (US);
Emil J Walerko, Blasdell, NY (US);
Assignee:
Allied Corporation, Morris Township, Morris County, NJ (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2603478 ;
Abstract
Mixtures including ethyl tetrahydrofurfuryl ether (ETFE), tetrahydrofurfuryl alcohol (THFA), ethanol and water, and usually also an ethyl halide, are extracted with an aqueous solution of an alkali metal or alkaline earth metal chloride salt until THFA/ETFE ratios below 0.01 or 0.001 are achieved. Thereby THFA and ethanol, each of which are difficult to separate from ETFE by distillation, are removed.