Process for decolorization and decalcification of sugar solution

Details Process for decolorization and decalcification of sugar solution Process for decolorization and decalcification of sugar solution

1990-09-07

1992-03-17

Willis, Jr., Prince

Sugar, starch, and carbohydrates

Processes

Carbohydrate manufacture and refining

127 463, C13J 106

Patent

active

050965000

ABSTRACT:
This invention provides a process for decolorization of sugar solutions with simultaneous removal of calcium ions from the solution, using an ion exchange resin. This process may be applied to liquors of cane sugar refineries or juices of beet sugar factories, or other sugar solutions. In this process, the sugar solutions containing anionic colorants and soluble calcium salts are passed through a strong base anionic exchange resin in carbonate form. During decolorization the carbonate ion bound to the fixed ions of the resin are exchanged by the anoinic colorants and they precipitate the soluble calcium in solution. The sugar solution treated by the resin is then filtered. Regeneration of the strong base anioniic resin is also provided. By this process, sugar colorants and calcium ions are removed from sugar solutions in a single operation using only an anionic ion exchange resin. However, a weak base anionic exchange resin can be used, in a separate column, before the strong base resin, as protection for the strong base resin.

REFERENCES:
patent: 2366651 (1945-01-01), Rawlings
patent: 2451272 (1948-10-01), Blann
patent: 3715235 (1973-02-01), Moebes et al.
patent: 3762948 (1973-10-01), Morton et al.
patent: 3961981 (1976-06-01), Pollio et al.
patent: 4065388 (1977-12-01), Flynn et al.

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