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:
Dec. 31, 1991
Filed:
Sep. 12, 1990
Applicant:
Inventors:
Russell B Kimbrell, Angleton, TX (US);
Christian D Kneupper, Lake Jackson, TX (US);
Ruben L Krause, West Columbia, TX (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
564292 ;
Abstract
The present invention is a process for producing halohydroxypropyltrialkylammonium halides by reacting a trialkylamine salt with an epihalohydrin, the improvement comprising using 1,3-dihalo-2-propanol as a cosolvent. Using that cosolvent reduces the amount of diquaternary, dichloropropanol, and epoxy by-products formed. The cosolvent is preferably separated from the reaction mixture and recycled for use with additional trialkylamine salt and epihalohydrin. The process is particularly useful in preparing chlorohydroxypropyltrimethylammonium chloride.