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:
Dec. 28, 1976
Filed:
Jul. 09, 1974
Howard B Irvin, Bartlesville, OK (US);
Phillips Petroleum Company, Bartlesville, OK (US);
Abstract
Separation by distillation and formation of immiscible liquid phases of nearly equal densities which comprises distilling a mixture containing the same in the presence of an added liquid of substantially different density, preferentially soluble in a recycle to the distillation zone and having a volatility under conditions of distillation such that it will vaporize preferentially to a liquid desired to be retained in the distillation zone to be removed as bottoms therefrom, e.g., toluene added to produce gravity separation of a heavy water-rich phase and a light phase containing phenol, cyclohexanone and cyclohexylbenzene and the added toluene which is used as reflux to the drying column in the overall process in which cyclohexanone and phenol are produced from cyclohexylbenzene.