Process for production of xylitol from lignocellulosic raw mater

Details Process for production of xylitol from lignocellulosic raw mater Process for production of xylitol from lignocellulosic raw mater

1987-01-30

1988-05-10

Alvo, Steve

Sugar, starch, and carbohydrates

Processes

Carbohydrate manufacture and refining

162 19, 162 72, 162 77, 162 76, D21C 320, C13K 102, C13K 1300

Patent

active

047428147

ABSTRACT:
A process for the production of sugars, and optionally cellulose and lignin, from lignocellulosic vegetable materials which comprises subjecting the vegetable materials to a chemical pretreatment with a mixture of water and lower aliphatic alcohols and/or ketones at a temperature from 100.degree. to 190.degree. C. for a period of from 4 hours to 2 minutes with control of the breakdown of the hemicellulose components followed by separation of residue and a subsequent main chemical treatment with a similar solvent mixture at elevated temperatures for a further period of from 6 hours to 2 minutes.

REFERENCES:
patent: 4018620 (1977-04-01), Penque
patent: 4237226 (1980-12-01), Grethlein
patent: 4470851 (1984-09-01), Pasner et al.

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