Recovery of sucralose intermediates

Details Recovery of sucralose intermediates Recovery of sucralose intermediates

1995-01-04

1996-06-25

Nutter, Nathan M.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

536115, 536119, 53612313, 536127, 127 30, 127 42, 127 461, 127 47, 127 58, C07H 1304, C07H 1306, C07H 1300

Patent

active

055301061

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.

REFERENCES:
patent: 5298611 (1994-03-01), Navia et al.
duPont Technical Information Bulletin "DMF--Recovery and Purification", Aug, 1987.
Johnson et al., "Salt Effect in Vapor-Liquid Equilibrium--Part II", Can. J. Chem. Eng. 38, 78-87 (1960).

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