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. 03, 1981
Filed:
Dec. 15, 1980
Kun C Youn, Houston, TX (US);
Dale J Wilpers, Houston, TX (US);
Shell Oil Company, Houston, TX (US);
Abstract
A simplified, energy efficient process for regulating the composition of recycle solvent obtained by the phase separation of the extract of oilseed extraction with an isopropanol-based solvent. In the extraction of oilseeds with such a solvent, there is obtained, by cooling of the extract, a solvent-rich liquid phase. The invention provides for regulation of the composition of this phase for purposes of solvent recycle by a process which comprises steps for dividing the phase into a first fraction (between about 60 and 95 percent) and a second fraction (between about 5 and 40 percent), directly recycling the first fraction as solvent for further extraction, distilling the second fraction to recover an overhead vapor-consisting essentially of a constant boiling mixture of isopropyl alcohol and water and a bottoms liquid, and condensing and recycling said overhead as solvent for further extraction. In combination, the first fraction and overhead product solvent recycle streams have a very desirable composition of several extraction system components.