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:
Oct. 12, 1999
Filed:
Sep. 03, 1998
Meng-Sheng Ao, Baton Rouge, LA (US);
Billie B Dadgar, Baton Rouge, LA (US);
Phillip R Beaver, Baton Rouge, LA (US);
Mark W Beltz, Prairieville, LA (US);
Albemarle Corporation, Richmond, VA (US);
Abstract
In an aqueous reaction medium, phenol is brominated with bromine under conditions forming an aqueous hydrobromic acid phase and an organic phase consisting essentially of molten 2,4,6-tribromophenol. The aqueous hydrobromic acid phase and the molten 2,4,6-tribromophenol are separated from each other, and optionally the molten 2,4,6-tribromophenol is washed with an aqueous decolorizing solution. An alkali metal base and water are mixed with the 2,4,6-tribromophenol to form an alkali metal salt of tribromophenol. Then, in a mixture consisting essentially of water and at least one liquid ketone, cyanuric chloride is reacted with at least a portion of the alkali metal 2,4,6-tribromophenolate of such that tris(2,4,6-tribromophenoxy)-s-1,3,5-triazine is produced.