Electrolysis process for removal of caustic in hemicellulose cau

Electrolysis: processes – compositions used therein – and methods – Electrolytic material treatment – Organic

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Other Related Categories

205693, 205510, 205511, 205513, C25F 100, C25B 116

Type

Patent

Status

active

Patent number

056676689

Description

ABSTRACT:
Pulping chemicals and hemicellulose are recovered from a starting solution essentially free of lignin but containing a mixture of hemicellulose and caustic by electrolyzing this solution in the anolyte compartment of an electrolytic cell. By electrolysis, the concentration of caustic in the anolyte is decreased and the concentration of caustic in a catholyte of said cell is increased so as to allow recovery of about 60 to about 80 percent of the caustic present in the hemicellulose caustic starting solution.

REFERENCES:
patent: 3806403 (1974-04-01), Ferguson
patent: 5034094 (1991-07-01), Kurple
patent: 5061343 (1991-10-01), Azarniouch et al.
patent: 5370771 (1994-12-01), Nilsson
patent: 5374333 (1994-12-01), Nykanen et al.

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