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:
Jan. 13, 1976
Filed:
May. 24, 1973
Ralph A Davis, Midland, MI (US);
Ronald G Tigner, Coleman, MI (US);
Joseph J Pedjac, Mount Pleasant, MI (US);
Laurence I Peterson, Midland, MI (US);
The Dow Chemical Company, Midland, MI (US);
Abstract
Brominated pentaerythritols are prepared at reaction temperatures of from about 85.degree. to 135.degree.C. by reacting pentaerythritol with HBr in the liquid phase employing a solvent medium containing from about 0.8 to about 25 mole percent of an aliphatic carboxylic acid of 2 to 8 carbon atoms and their anhydrides, based on the pentaerythritol. The HBr is fed continuously to the reactor throughout the reaction. The water formed as a result of the reaction remains in the reaction mixture until substantial completion of the reaction. The product can be predominantly dibromoneopentyl glycol or tribromoneopentyl alcohol and is characterized by the absence of tar formation.