Process of manufacturing crystal sugar from an aqueous sugar juice such as cane juice or sugar beet juice
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United States of America Patent
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Sep 10, 1996
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app pub date -
Nov 12, 1993
filing date -
Nov 12, 1993
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Abstract
This invention relates to a process for the manufacture of crystal sugar from an aqueous sugar juice containing sugars and organic and mineral impurities, including Ca.sup.2+ and/or Mg.sup.2+ ions, such as a sugar cane or sugar beet juice, comprising the following operations: (a) concentration of said sugar juice to give a syrup, and (b) crystallization of said syrup to give a crystal sugar and a molasses, characterized in that it also comprises an operation: (c) of tangential microfiltration, tangential ultrafiltration or tangential nanofiltration, this operation being effected before operation (a). It also relates to a process for the production of crystal white sugar from a sugar juice of the sugar cane juice type, comprising the above-mentioned process for the production of crystal sugar, completed by re-melt, decolorization and crystallization operations.
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