Liquid purification or separation – Processes – Ion exchange or selective sorption
Patent
1996-09-18
1999-08-03
Cintins, Ivars
Liquid purification or separation
Processes
Ion exchange or selective sorption
127 462, 210917, 521 26, B01D 1504
Patent
active
059321067
ABSTRACT:
Process for regeneration of ion-exchange resins, used in sugar decolorization, using a sucrose solution with sodium or calcium chloride, or another chloride, namely potassium or a mixture of those chlorides, alkalinised with calcium hydroxide. The regeneration of the resin is made with a flow between 1 to 3 cubic meters of a regenerating solution by a cubic meter of resin/hour and a temperature between 40.degree. to 70.degree. centigrade. The sucrose solution used in this resin regeneration process contains between 30 to 600 g of sucrose per liter of solution; calcium hydroxide between 1 to 40 g of CaO per liter of solution; and calcium or sodium chloride, or another chloride, namely the one of potassium, or a mixture of these compounds, in such a quantity that chloride ion concentration is between 3 to 30 g per liter of solution. This regenerating solution is passed through the resin in a quantity between 2 to 4 cubic meters per cubic meter of resin. The effluent from this resin regeneration process, containing sucrose and a low content of chloride ions, can be used, directly or after a chemical or physical treatment, in sugar production or sugar refining processes.
REFERENCES:
patent: 2507992 (1950-05-01), Payne et al.
patent: 4353992 (1982-10-01), Pannekeet
Derwent Abstract, WPI Database, of SU,A,1723,135 published Mar. 30, 1992.
Chemical Abstract, vol. 104, No. 104: 35880e, 1986.
Cintins Ivars
RAR--Refinarias de A.cedilla.ucar Reunidas, S.A.
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