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:
May. 20, 1980
Filed:
Aug. 30, 1978
Richard A Bafford, Tonawanda, NY (US);
Orville L Mageli, Kenmore, NY (US);
Pennwalt Corporation, Philadelphia, PA (US);
Abstract
An aliphatic or cycloaliphatic hydroperoxide, an olefin such as a 1-aromatic-1-substituted ethylene and a halide corresponding to the ethylene are reacted under essentially anhydrous conditions, in the absence of a free acid, at a temperature below the decomposition temperature of the halide to obtain a peroxide corresponding to the hydroperoxide and the ethylene. Preferably the product peroxide is recovered by treating the reaction product mixture with aqueous alkali metal hydroxide to destroy the halide and hydroperoxide therein; then distilling the treated mixture in the presence of a substantial amount of liquid water at sub-atmospheric pressure to remove overhead impurities. Example: Dicumyl peroxide is prepared by reacting at about 30.degree. C. for about 5 hours cumene hydroperoxide, .alpha.-methylstyrene and cumyl chloride, which compounds has been charged to the reaction zone in a mole ratio of 1.25:0.86:0.14 and treating the reaction product mixture with aqueous alkali metal hydroxide to remove cumyl chloride and cumene hydroperoxide to obtain a product mixture including dicumyl peroxide; and adding 2-10 parts of liquid water to the product mixture in a distillation zone and vaporizing water and impurities at a temperature of about 30.degree.-80.degree. C. at a pressure of about 0.01-0.5 atmospheres and continuing said vaporization until essentially no oily liquid is obtained in a condensor receiving vapors from said zone, under conditions such that a substantial amount of liquid water is present in said zone in contact with peroxide product.