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:
Jun. 08, 1982
Filed:
Jun. 30, 1980
Katsuhiko Hashimoto, Iwakuni, JP;
Hirohiko Nambu, Iwakuni, JP;
Kazuhiro Watari, Waki, JP;
Kenichi Mizuno, Iwakuni, JP;
Tadateru Murakami, Otake, JP;
Yutaka Matsuoka, Iwakuni, JP;
Mitsutoshi Moriyama, Musashino, JP;
Norio Ohno, Waki, JP;
Mitsu Petrochemical Industries Ltd., Tokyo, JP;
Abstract
Disclosed is a process for the preparation of phenols which comprises reacting an .alpha.-hydroxyalkyl-substituted aromatic compound and/or an .alpha.,.beta.-unsaturated alkyl-substituted aromatic compound with hydrogen peroxide in the presence of an acid catalyst, in which hydrogen peroxide is diluted with a diluent, especially acetone, so that the volume is at least 10 times the original volume, and the diluted hydrogen peroxide is supplied in a divided manner to at least two portions of a reaction vessel or the diluted hydrogen peroxide is scattered by sprinkling into the reaction vessel. According to a preferred embodiment, the diluted hydrogen peroxide is continuously supplied to the gas phase in the reaction vessel from a scattering device which is similar to but separate from a scattering device for supplying the starting aromatic compound, particularly, a product formed by oxidizing an isopropyl aromatic compound with molecular oxygen. According to this process, the efficiency of utilization of hydrogen peroxide is increased and a phenol of high quality can be obtained in a high yield with a high safety.