Process of manufacturing crystal sugar from an aqueous sugar juice such as cane juice or sugar beet juice
US5554227A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1993 |
| Grant date | Sep 10, 1996 |
| Priority date | — |
| Expiry date | Nov 12, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC13B30/02
- WIPO fieldFood chemistry
- WIPO sectorChemistry
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: PA1 (a) concentration of said sugar juice to give a syrup, and PA1 (b) crystallization of said syrup to give a crystal sugar and a molasses, characterized in that it also comprises an operation: PA1 (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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.