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:
Sep. 14, 1976
Filed:
Jan. 17, 1974
Wilhelm Becker, Hamburg, DT;
Hoechst Aktiengesellschaft, , DT;
Abstract
The invention relates to a process for the manufacture of glycidyl ethers of monohydric or polyhydric phenols with excess epichlorohydrin, wherein the monohydric or polyhydric phenols are reacted with excess epichlorohydrin, based on the phenolic hydroxyl group, in the presence of a catalyst specific for the formation of chlorohydrin ethers from phenols and epichlorohydrin, and of 0.2 to 8 % by weight of water, based on the reaction medium, until the conversion to chlorohydrin ethers is at least 10 %, preferably 50 - 90 %, based on the phenolic hydroxyl groups, and are then reacted by heating with 0.9 to 1.15 equivalents of a solid alkali metal hydroxide per phenolic hydroxyl group to give glycidyl ethers.