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:
Mar. 31, 1987
Filed:
Mar. 20, 1986
Carole L Elias, Plum Boro, PA (US);
Marvin C Fields, Wilkins Township, Allegheny County, PA (US);
Aristech Chemical Corporation, Pittsburgh, PA (US);
Abstract
Crude cumene hydroperoxide is purified by subjecting it to an evaporation step at a pressure of about 2 to 10 (preferably 3 to 7) mg Hg abs. and a temperature of about 150.degree. F. to about 210.degree. F. (pref. about 175.degree. F. to 195.degree. F.) to remove light impurities and then subjecting the residue from the first evaporation step to a second evaporation step also at a temperature of about 135.degree. F. to 210.degree. F. (pref. about 150.degree. F. to 185.degree. F.) but at a pressure of about 0.5 to about 8 (preferably 1 to 3) mm Hg abs. to obtain a distillate significantly reduced in color bodies, water, acetophenone, and dimethylbenzyl alcohol, and sodium.