Patent application number | Description | Published |
20080300391 | Acid Mediated Deacylation of 6-0-Trichlorogalactosurcrose to Trich-Lorogalactosucrose - A process is described for acid mediated deacylation of acyl derivatives of chlorinated sucrose compounds comprising generating a predominantly organic phase condition in a process stream requiring deacylation treatment but allowing an optimum quantity of water content which is capable of participating in a hydrolysis reaction; this objective being achieved for the said process stream by following steps of (a) adding to it alcoholic solvent in an amount such that water content of final reaction mixture is between about 5% to 0.5%, (b) adding acid chloride to the same (c) adjusting the pH to 4 by adding acetate buffer in a methanolic solution and, (d) stirring the reaction until deacylation is complete. This process can be integrated in a process for production of a chlorinated compound, involving use of dimethylformamide during the process, to achieve deacylation without decomposition of dimethylformamide as well as the chlorinated sucrose product. | 12-04-2008 |
20090208747 | Novel Crystalline Methods and Novel Crystalline and Amorphous forms of Halogenated Sugars - Disclosed is crystalline 4,1′,6′Trichlorogalactosucrose (TGS) having enhanced storage stability, a mean particle size of about 5 microns or less, 90% particles being less than about 10 microns and the maximum particle size being more than twice the mean but less than about 35 microns; and a process for producing the same comprising gradual cooling of a saturated solution of TGS of a mixture of a a polar alcoholic solvent and a less polar organic solvent, the proportion of the said polar alcoholic solvent being within maintained within a range of about 3% to | 08-20-2009 |
20090264640 | Recovery of dimethylformamide and other solvents from process streams of manufacture of trichlorogalactosucrose - This invention comprises an improved process for recovery and purification of DMF from an aqueous process stream containing DMF with or without inorganic impurities, particularly from process stream of a process of manufacture of the high intensity sweetener Trichlorogalactosucrose, by adsorption on an adsorbent having selective affinity towards dimethylformamide, followed by elution in pure form by eluting by an appropriate eluent, including methanol. | 10-22-2009 |
20100151526 | Method of Producing Sucrose-6-Acetate by Whole-Cell Biocatalysis - A process is described which uses whole cell preparations, immobilized or without immobilization, of a microorganism, including | 06-17-2010 |
20100160625 | Novel Preparation of 6-O-Acyl Chlorosucrose from Anhydrous Cholorinated Reaction Mass - A process is described for production of a chlorinated sucrose from a process stream containing a 6-O-protected chlorinated sucrose derived from chlorination of 6-O-protected sucrose wherein the process stream is treated under conditions which prevent or reverse deacylation of 6-O-protected chlorinated sucrose, extracting the same in a solvent, washing most of the dimethylformamide free from the solvent extract by repeated washing with saturated sodium chloride solution, isolating the 6-O-protected sucrose as a pure fraction and obtaining a chlorinated sucrose by deacylating the same. | 06-24-2010 |
20100168412 | Continuous Neutralizer Mixer Reactor and a Continuous Process for Quenching Chlorination Reaction Mixture in Production of Chlorinated Sucrose - An improved process of production of a chlorinated sugar is described comprising chlorination of a partially protected sugar, wherein quenching as well as neutralization of chlorinated reaction mass is carried out concurrently and continuously in a reactor which is a continuous mixer as well as quencher providing continuous mixing of chlorination reaction mixture and pH adjusting solution and also provides for continuous quenching and continuous removal of quenched chlorinated reaction mixture. | 07-01-2010 |
20100222570 | Process for production of chlorinated sucrose based on hydrophobic affinity chromatography - This invention relates to a process for selective capture, isolation and purification of chlorinated sucrose compounds, including chlorinated sucrose, their precursors and derivatives, including trichlorogalactosucrose (TGS), directly from chlorinated reaction mixture by column chromatography on adsorbents and under conditions which result in specific and selective affinity towards one or more of chlorinated sucrose compound. The process also integrates de-esterification of chlorinated sucrose esters adsorbed on the adsorbent while they are being treated with desorbent. The process also provides a novel approach to concentration and crystallization of TGS. The chlorinated sucrose derivatives, including TGS, thus isolated are substantially free from most impurities, salts and organic solvents. The process has high recovery of more than 95% in terms of desired chlorinated sucrose derivatives including TGS. | 09-02-2010 |
20100228020 | Novel Chlorination Reagent and a Novel Process for Chlorination of Sugars Using Thionyl Chloride - Preparation of chlorinating reagent or chlorination reaction itself for use in a reaction such as production of high intensity sweetener trichlorogalactosucrose (TGS) from partially protected sucrose, comprising reaction of dimethylformamide (DMF) with thionyl chloride or another sulphur containing inorganic acid chlorides including sulphuryl chloride is faced with a problem of prolific release of gaseous by-products, that at times may lead to violent explosion also. This problem is solved by innovative addition of solid powder inert to the constituents of the chlorination reaction mixture to the reaction, or by adding DMF to acid chloride solution in that order. The invention also leads to use of isolated solid Vilsmeier reagent being used for chlorination in a solvent other than DMF making it possible to avoid altogether problems arising from use of DMF which include irrecoverable loss in alkaline as well as acid conditions, interference in crystallization of TGS and the like. | 09-09-2010 |
20110306102 | IMPROVED METHODS FOR FERMENTATIVE PRODUCTION OF DOCOSAHEXAENOIC ACID - The invention comprises a process of producing polyunsaturated fatty acids from Thraustochytriales at high availability of oxygen by solid state fermentation or submerged fermentation in a batch, semi-continuous or continuous mode. Batch fermentation of more than 200 g/L and up to 450 g/L of dextrose added right in the beginning of fermentation was achieved with productivity of DHA achieved for higher than 10 g/Liter. The process comprises maintaining at least 20% to 30% dissolved oxygen and sometimes up to around 50% or more. | 12-15-2011 |