Process and installation for treating cellulose waste lye

Details Process and installation for treating cellulose waste lye Process and installation for treating cellulose waste lye

1997-07-22

1998-03-10

Phasge, Arun S.

Electrolysis: processes, compositions used therein, and methods

Electrolytic synthesis

Preparing organic compound

204519, 204530, 204531, 204541, 204544, 204257, 204628, 204630, 204633, 204637, B01D 6144

Patent

active

057257485

ABSTRACT:
In a process for an electrochemical treatment of cellulose waste lye, mass transport takes place through a diaphragm or membrane between a cathode chamber and an anode chamber, and optionally through a middle chamber. Cationogenic components are removed from cellulose waste lye containing lignin sulfonates and being located in at least one of the chambers. Lignin sulfonic acids are produced from the waste lye. In an installation for an electrochemical treatment of cellulose waste lye, at least one diaphragm divides at least one reaction vessel into at least one cathode chamber and at least one anode chamber. At least one cathode electrode is disposed in the at least one cathode chamber, and at least one anode electrode is disposed in the at least one anode chamber. The at least one cathode electrode is formed of iron or aluminum and the at least one anode electrode is formed of special steel, in particular V4A steel. A lignin sulfonic acid of extensively uniform molecular mass distribution and extensively replicable three-dimensional molecular structure and subsequent products recovered from the lignin sulfonic acid are produced by the process and the installation.

REFERENCES:
patent: 2354553 (1944-07-01), Sherk
patent: 3148177 (1964-09-01), Wiley et al.
patent: 4584057 (1986-04-01), Rowe et al.
patent: 4775480 (1988-10-01), Milton et al.
patent: 5334300 (1994-08-01), Herron et al.

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