Dual catalyst sequential method for production of sorbitol...

Details Dual catalyst sequential method for production of sorbitol... Dual catalyst sequential method for production of sorbitol...

C - Chemistry, Metallurgy

07

C

260/632.7

C07C 29/10 (2006.01) C07C 31/26 (2006.01)

Patent

CA 1271781

PATENT DPC(ChPr) 7069 DUAL CATALYST SEQUENTIAL METHOD FOR PRODUCTION OF SORBITOL FROM HYDROLYZED STARCH SOLUTION Abstract A process for production of sorbitol from 50-98.5 DE hydrolyzed starch solution by hydrogenation over a nickel catalyst at a pH of from 3.0 to 7.0, 120 to 160° C. and 500 to 2000 psig (35 to 140 bars) until the reducing sugar value is below 5 percent; removal of nickel catalyst, acidification to pH 1.0 to 2.5 and hydrogenation of the acidified solution over a ruthenium catalyst, 100 to 180° C. and 500 to 2000 psig, until hydrogen uptake is substantially complete, and removal of the ruthenium catalyst.

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