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. 04, 1976
Filed:
Aug. 13, 1974
Yani Christidis, Paris, FR;
Nobel Hoechst Chimie, Puteaux, FR;
Abstract
An improvement to the process for preparing a polyhydric alcohol bromohydrin from the group consisting in the polymethylol-alkanes, penta-erythritols, amino-substituted polyhydric alcohols by the action of hydrobromic acid on the said polyhydric alcohol, consisting of effecting the reaction in an acetic medium with an aqueous solution of hydrobromic acid, eliminating the water during the course of the reaction by distillation of a water-acetic acid mixture rich in water, by means of an apparatus comprising a distillation column adapted to extract vapours at a temperature lower than 103.degree.C, collecting the resultant product, subjecting this latter to a transesterification reaction with a monohydric-alcohol of low molecular weight from the methanol group, and subjecting said product to a purification treatment.