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. 14, 1992
Filed:
Feb. 08, 1991
James E Borland, Baton Rouge, LA (US);
Jeffrey W Perine, Baton Rouge, LA (US);
Joe D Sauer, Baton Rouge, LA (US);
Kim R Smith, Baton Rouge, LA (US);
Ethyl Corporation, Richmond, VA (US);
Abstract
Betaines are produced in solid form by reacting the corresponding quaternary ammonium ester with a base, such as sodium hydroxide, in a polar aprotic solvent in which the betaine is substantially insoluble, the ester being the product obtained by reacting a tert-amine, such as an N-alkyldimethylamine, with an alkyl haloalkanoate. The haloalkanoate is preferably a compound corresponding to the formula X(CH.sub.2).sub.n COOZ in which X is chloro, bromo, or iodo; Z is an alkyl group containing 1-6 carbons; and n is an integer of 1-6. A preferred solvent for use in the process is 2-butanone.