B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
260/133, 260/234
B01D 15/08 (2006.01) C07G 1/00 (2006.01) C08H 6/00 (2010.01) C13D 3/14 (2006.01)
Patent
CA 1249812
ABSTRACT Sulphite spent liquor is subjected to a two-step chromatographic separation whereby substantially pure fractions of sugars and lignosulphonates are obtained. The process for the separation of sugars and lignosulpho- nates comprises the steps of a) introducing sulphite spent liquor with a pH of 2.5 to 3.5 into a chromatographic column containing a resin in metal salt form; b) eluting the column with water to obtain a sub- stantially sugar-free lignosulphonate-rich fraction and a sugar-rich fraction; c) collecting the sugar-rich fraction for further purification; d) adjusting the pH of the collected sugar-rich material to between 5.5 and 6.5 and introducing the mate- rial into a second chromatographic column containing a resin in monovalent metal salt form; and e) eluting the sugar-rich material from the second column, whereby a pure sugar-rich fraction and a ligno- sulphonate-rich fraction are formed.
519794
Danisco Sweeteners Oy
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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