DECOLORIZATION OF PROCESS STREAMS BY CHEMICAL OXIDATION IN THE MANUFACTURE OF TRICHLOROGALACTOSUCROSE
First Claim
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1. A process of production of a chlorinated sugar comprising need to remove at least one colored decomposition product of sugar or at least one of its coloured decomposition derivative, wherein the said color is removed by a chemical oxidation process that does not adversely affect the chlorinated sugar.
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Abstract
A process is described in which decolorization of solutions or reaction mixtures containing trichlorogalactosucrose or 6-acetyl trichlorogalactosucrose is achieved described by bubbling ozone. The method can be used at various stages in the process of production and with or without a combination with other adsorbents for colour removal.
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12 Claims
- 1. A process of production of a chlorinated sugar comprising need to remove at least one colored decomposition product of sugar or at least one of its coloured decomposition derivative, wherein the said color is removed by a chemical oxidation process that does not adversely affect the chlorinated sugar.
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10. A process of production of Trichlorogalactosucrose (TGS) comprising following steps:
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a. chlorinating 6-acetyl TGS by vilsmeier reagent accompanied by heating, b. quenching the chlorination reaction mixture and adjusting the pH to about 7, c. selectively binding 6-acetyl TGS and other acetyl chlorinated sugars in the reaction mixture on an affinity chromatography resin, d. eluting out the adsorbed 6-acetyl TGS from the resin, e. subjecting the eluted out fraction, preferably after concentration, to bubbling of ozone maintaining the pH between 5 to 6, for a period of time enough to reduce colour to acceptably low level, preferably reading around 70 CU units on platinum cobalt scale, f. deacylation, g. extraction of TGS in ethyl acetate, and h. isolation of solid TGS.
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11. A process of production of Trichlorogalactosucrose (TGS) comprising following steps:
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a. chlorinating 6-acetyl TGS by vilsmeier reagent accompanied by heating, b. quenching the chlorination reaction mixture and adjusting the pH to about 7, c. deacetylation, d. subjecting the deacetylated reaction mixture for ozone bubbling accompanied by maintaining pH between about 5 to 6, e. selectively binding TGS and other chlorinated sugars in the reaction mixture on an affinity chromatography resin, f. concentrating and removing volatile solvent by passing through falling film evaporation process, g. subjecting the concentrated TGS solution in water to ozone bubbling accompanied by maintaining pH between about 5 to 6 by adding NaOH, h. extracting TGS in ethyl acetate, i. isolating solid TGS.
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12. A process of production of Trichlorogalactosucrose (TGS) comprising following steps:
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a. chlorinating 6-acetyl TGS by vilsmeier reagent accompanied by heating, b. quenching the chlorination reaction mixture and adjusting the pH to about 7, c. deacetylation, d. extracting in ethyl acetate, e. optionally concentrating ethyl acetate extract to about 50% volume under educed pressure, f. bubbling ozone gas through ethyl acetate extract maintaining pH to about 5 to 6, g. isolating solid TGS.
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Specification