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:
Jun. 25, 1996
Filed:
Jan. 04, 1995
Applicant:
Inventors:
Juan L Navia, Athens, GA (US);
Robert E Walkup, Watkinsville, GA (US);
David S Neiditch, Athens, GA (US);
Assignee:
McNeil-PPC, Inc., Skillman, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07H / ; C07H / ; C07H / ;
U.S. Cl.
CPC ...
536-41 ; 536115 ; 536119 ; 53612313 ; 536127 ; 127 30 ; 127 42 ; 127 461 ; 127 47 ; 127 58 ;
Abstract
There is disclosed a process for recovering sucralose-6-ester from a feed mixture of 6-O-acyl-4,1',6'-trichloro-4,1',6'-trideoxygalactosucrose in a reaction medium comprising a tertiary amide (such as N,N-dimethylformamide), wherein said process comprises removing a major proportion of said tertiary amide by steam distillation. In preferred aspects of the invention, the steam distillation is followed by extraction and then purification by crystallization or crystal aging to recover sucralose-6-ester in good yield.