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:
Nov. 09, 1982
Filed:
Jan. 26, 1982
Applicant:
Inventors:
Bonnie K Mettetal, Richwood, TX (US);
Richard P Kolonko, Jr, Lake Jackson, TX (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; C07C / ;
U.S. Cl.
CPC ...
203 38 ; 203 64 ; 203 91 ; 203D / ; 562600 ;
Abstract
Carbonyl impurities in acrylic acid are removed by reacting them with a 1,2-glycol prior to distillation. The acetal-type products remain as heavies in the distillation bottoms.