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. 19, 1977
Filed:
Apr. 12, 1976
Alan D Kornfeld, East Windsor, NJ (US);
Oxirane Corporation, Princeton, NJ (US);
Abstract
In the epoxidation of propylene with tertiary butyl hydroperoxide to form propylene oxide, a by-product, tertiary butyl alcohol is formed. This alcohol can be dehydrated to form isobutylene which can be sold as a product or hydrogenated, followed by oxidation, and the resulting hydroperoxide reacted with propylene to produce propylene oxide and tertiary butyl alcohol for recycle. In this process, the operation of the tertiary butyl alcohol vaporizer is substantially improved by increasing the quantity of liquid purge to at least 15 weight percent of the input. Under such operating conditions, the organic content of the waste water effluent from the entire plant is reduced, fouling of the vaporizer heat transfer surfaces is minimized thereby increasing the on-stream time between cleanings by as much as 2-3 times the normal, and deposits are more easily removed from the vaporizer when it is shut down for cleaning.