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:
Apr. 13, 1976
Filed:
Sep. 20, 1973
Hideaki Suda, Takaishi, JA;
Iwao Dohgane, Nishinomiya, JA;
Takashi Chinuki, Toyonaka, JA;
Kenji Tanimoto, Minoo, JA;
Hirokazu Hosaka, Minoo, JA;
Yukimichi Nakao, Kobe, JA;
Yuji Ueda, Izumiotsu, JA;
Seiya Imada, Sakai, JA;
Hideki Yanagihara, Toyonaka, JA;
Kunihiko Tanaka, Ibaragi, JA;
Sumitomo Chemical Company, Limited, Osaka, JA;
Abstract
Impurities, that is, by-products, in an oxidation product solution obtained by oxidation of diisopropylbenzene by molecular oxygen or in the oxidation product solution freed from diisopropylbenzene dihydroperoxide, are removed by extracting the by-products such as carbinols, ketones and styrenes from the solution with a mixture of an aqueous alkaline solution and at least one of alcohols having 1 to 3 carbon atoms such as methanol, ethanol, and isopropanol, as an extracting reagent at a temperature of 20.degree. to 80.degree.C.