Dual catalyst sequential method for production of sorbitol from

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

1986-06-04

1987-09-15

Evans, J. E.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568868, C07C 29132, C07C 2914, C07C 3126

Patent

active

046941134

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.degree. to 160.degree. 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.degree. to 180.degree. C. and 500 to 2000 psig, until hydrogen uptake is substantially complete, and removal of the ruthenium catalyst.

REFERENCES:
patent: 2868847 (1959-01-01), Boyers
patent: 3963789 (1976-06-01), Kruse
patent: 4017363 (1977-04-01), McMullen
Faith, Keyes and Clark's Industrial Chemicals, Wiley-Interscience Publn., New York, Fourth Edition, 1975, pp. 774-778.
Starch Conversion Technology, Macel Dekker, Inc., New York, van Beynum and Roels, editors, pp. 278-280, 1985.

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