Sugar – starch – and carbohydrates – Processes – Carbohydrate manufacture and refining
Patent
1981-03-26
1983-10-11
Smith, William F.
Sugar, starch, and carbohydrates
Processes
Carbohydrate manufacture and refining
162 72, 162 14, 162 76, C13K 102
Patent
active
044090323
ABSTRACT:
Cellulose-containing material is rapidly saccharified to convert pentosans and hexosans to sugars by cooking under pressure at from 180.degree. C. to 220.degree. C. with acetone-water solvent mixture carrying from 0.05 to 0.25 weight percent of phosphoric, sulfuric or hydrochloric acids.
A predominantly cellulosic material, e.g. a delignified pulp, is hydrolysed to yield relatively pure glucose recoverable from liquor which is flowed through the cellulose, then withdrawn and cooled and neutralized within an elapsed time of a minute or less.
Whole wood is nearly totally dissolvable by the process, yielding mixed pentoses and hexoses. The dehydration and degradation products of sugars are formed by prolonging retention time of liquor from 20 to 45 minutes.
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Chang et al., "Comparative Dissolution Rates of Carbohydrates & Lignin During Acidified Aqueous Organosolv Saccharification of Alcohol--Benzene Extracted Douglas Fir & Aspen Woods", Presented by Tapper, Forest Biology/Wood Chemisty Symposium Jun. 20-22, 1977, Madison, Wis.
Chang et al., "Recovery and GC Analysis of Wood Sugars From Organosolv Saccharification of Douglas--Fir Heartwood", Presented at the 1976 Canadian Wood Chemistry Symposium Mont Gabrial P. Q., Sep. 1-3, 1976.
Chang Pei-Ching
Paszner Laszlo
McLeod Ian C.
Smith William F.
Thermoform Bau-Und Forschungsgesellschaft
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