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:
Aug. 09, 1988
Filed:
Dec. 19, 1986
David B Litzen, Houston, TX (US);
Stephen R Bolger, La Porte, TX (US);
Shell Oil Company, Houston, TX (US);
Abstract
A process for the purification of the crude isopropyl alcohol product of propylene hydration reactions. Crude isopropyl alcohol products, which comprise isopropyl alcohol, diisopropyl ether and polymeric impurities, are subjected to a specified sequence of multiple dilution and phase separation steps which serve to extract a substantial portion of the product's diisopropyl ether and polymeric impurities. The invention is particularly useful in removing odiferous sulfur-containing impurities from the products of indirect propylene hydration processes which involve the reaction of propylene with sulfuric acid to produce isopropyl sulfate followed by hydrolysis of the sulfate to isopropyl alcohol.