Methods and systems for preparing materials for sucralose...

Details Methods and systems for preparing materials for sucralose... Methods and systems for preparing materials for sucralose...

2011-01-04

2011-01-04

Choi, Ling-Siu (Department: 1796)

Compositions

Compositions containing a single chemical reactant or plural...

Organic reactant

C536S017200, C536S124000, C536S127000, C210S634000, C210S734000, C210S767000, C210S770000

Reexamination Certificate

active

07862744

ABSTRACT:
The present invention provides a method for preparing DMF for sucralose production, including, e.g., isolating DMF from a composition comprising DMF, water, and methanol, using a single-tower rectification system. In various embodiments of the present invention, the composition, after the removal of water and methanol, may be further dried/dehydrated, such as, by using a dehydration agent and/or filtration. The resulting substantially pure DMF may comprise at least about 98-99% DMF. The present invention further provides a method of preparing a composition comprising anhydrous sucrose for sucralose production, which may comprise mixing regular sucrose with a water-containing DMF composition, and drying the resulting sucrose-DMF composition. Also provided is a single-tower separation system for isolating DMF from a composition comprising DMF, water, and methanol.

REFERENCES:
patent: 3072725 (1963-01-01), Surman
patent: 03148244 (1991-06-01), None

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