Process for the two-stage composition of the hemicelluloses of x

Details Process for the two-stage composition of the hemicelluloses of x Process for the two-stage composition of the hemicelluloses of x

1976-11-22

1979-01-30

Brown, Johnnie R.

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

Organic compounds

Carbohydrates or derivatives

260124R, 568852, C07H 100, C07H 108

Patent

active

041373952

ABSTRACT:
A process for the two-stage decomposition of hemicelluloses of xylane-containing natural products is disclosed for the purpose of obtaining xylose and/or xylitol. According to the process, in a first stage natural products containing xylane are brought into contact with an alkali hydroxide solution and the residue conveyed into a subsequent extraction zone where it is extracted. In a second stage the extraction residue of the first stage is brought into contact with dilute acid and the residue conveyed into a subsequent extraction zone is extracted. The process is characterized in particular that the treated material is moved continuously in both stages in successive reactors by conveyor devices having different conveying performances, e.g., different lengths, cross-sections, speeds of conveying and the like.

REFERENCES:
patent: 2174651 (1939-10-01), Byrkit, Jr.
patent: 2642462 (1953-06-01), Kasehagen
patent: 2650941 (1953-09-01), Koome et al.
patent: 3546296 (1970-12-01), Gobron et al.
patent: 3586537 (1971-06-01), Steiner et al.
patent: 3954497 (1976-05-01), Friese
patent: 3970712 (1976-07-01), Friese
patent: 3990904 (1976-11-01), Friese et al.

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