Process for the production of a hemicellulose hydrolysate and sp

Details Process for the production of a hemicellulose hydrolysate and sp Process for the production of a hemicellulose hydrolysate and sp

1990-06-08

1992-08-18

Alvo, Steve

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Treatment with particular chemical

162 83, 162 84, D21C 304, D21C 306, D21C 320

Patent

active

051396173

ABSTRACT:
A process for the production of a hemicellulose hydrolysate and special pulp through two steps, the first step comprising the prehydrolysis of the material and the second step the dissolving of the lignin contained in the prehydrolyzed material. According to the process the lignin dissolving is carried out by neutral sulphite cooking with anthraquinone or a derivative thereof as a catalyst, the pH of the cooking liquor being initially at least 10.

REFERENCES:
patent: 1880046 (1932-09-01), Richter
patent: 3532597 (1970-10-01), Ljunggvist
patent: 3832278 (1974-08-01), Villavicencio
patent: 4213821 (1980-07-01), Vanderhoek et al.
Abstract No. 8770 of Bulletin of the Institute of Paper Chemistry.
Wong, "Sulfide Pulping: A Review of Its History and Current Technology", Pulp & Paper, Nov. 1980, pp. 74-81 (162-83).
Zakhariev, Ch.: et al. "Possibility of Obtaining Sugar Solutions from Beechwood to be Used for Manufacture of Semichemical Pulp", ABIPC Vol. 56, No. 8 (Feb. 1986) Abstract 8910.
"Cooking of Sulfate Pulp" by B. Z. Smolyanitskii; Lesnaya Promyshlennost Publishers, Moscow, 1983, p. 7.

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