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. 06, 1982
Filed:
Dec. 15, 1980
Applicant:
Inventor:
Mark R Johnson, Midland, MI (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
203-8 ; 2604 / ; 2604 / ;
Abstract
Nitrogen oxides have been found to be effective to inhibit during distillation the vinyl polymerization of a 2-isocyanatoalkyl ester of an unsaturated carboxylic acid. For example, crude 2-isocyanatoethyl methacrylate was sparged with nitric oxide in nitrogen gas during distillation at 90.degree. C., so as to effect a concentration of nitric oxide in the gas phase of 376 parts per million by weight. Essentially pure 2-isocyanatoethyl methacrylate was recovered in 70 percent yield.