Methods and systems for preparing materials for sucralose...

B - Operations – Transporting – 01 – D

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B01D 3/12 (2006.01) C07H 3/04 (2006.01) C07H 5/02 (2006.01)

Patent

CA 2730794

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.

La présente invention concerne un procédé de préparation de DMF pour la production du sucralose, comprenant, par exemple, l'étape consistant à isoler le DMF à partir d'une composition comprenant du DMF, de l'eau, et du méthanol, en utilisant un système de purification à tour unique. Dans divers modes de réalisation de la présente invention, la composition, après élimination de l'eau et du méthanol, peut être en outre séchée / déshydratée, tel quen utilisant un agent de déshydratation et/ou une filtration. Le DMF résultant essentiellement pur peut comprendre au moins environ 98 99 % de DMF. La présente invention concerne en outre un procédé de préparation d'une composition comprenant du saccharose anhydre pour la production du sucralose, qui peut comprendre les étapes consistant à mélanger le saccharose ordinaire avec une composition de DMF contenant de l'eau, et à sécher la composition de DMF-saccharose résultante. L'invention concerne également un système de séparation à tour unique pour isoler le DMF à partir d'une composition comprenant du DMF, de l'eau, et du méthanol.

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