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. 28, 1981
Filed:
Aug. 30, 1979
Karel A Snoble, Midland, MI (US);
The Dow Chemical Company, Midland, MI (US);
Abstract
A process for recovering amino alcohols, e.g. diisopropanolamine, from their corresponding cyclic reaction products, which products are the result of the reaction of CO.sub.2 and the amino alcohol, i.e., oxazolidinones, a situation commonly encountered in acid gas removal processes employing the amino alcohols alone or in combination with other liquids such as sulfolane (tetrahydrothiophene-1,1-dioxide) for example, by reacting the cyclic product with a small but catalytic amount (less than about 10 mol percent) of a base metal compound such as the hydroxide or a base which will convert into a hydroxide under the conditions of reaction, i.e. the acid carbonates, carbonates, metaborates, oxides or hydrides at temperatures above about 105.degree. C. to about the atmospheric boiling point of the reaction medium and, optionally, recovering the amino alcohol from the reaction mass.