Process for obtaining lignin from alkaline solutions thereof

Details Process for obtaining lignin from alkaline solutions thereof Process for obtaining lignin from alkaline solutions thereof

1984-10-29

1986-04-22

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204149, 204151, 2041826, B01D 1302

Patent

active

045840768

ABSTRACT:
The invention relates to a method and apparatus for recovering lignin and kali from an alkaline lignin solution. One or more electrolytic cells are used to anodically acidify the lignin and simultaneously cathodically regenerate alkali. The invention is especially advantageous for the preparation of pure lignin and alkali from the waste liquor of a cellulose process.

REFERENCES:
patent: 3525682 (1970-08-01), McRae et al.
patent: 3897319 (1975-07-01), Anderson et al.
patent: 3905886 (1975-09-01), Wang
patent: 4043896 (1977-08-01), Ahlgren
patent: 4049490 (1977-09-01), Zaplatin et al.
patent: 4123342 (1978-10-01), Ahlgren
patent: 4140615 (1979-02-01), Kadija et al.
patent: 4273628 (1981-06-01), Kidon et al.
patent: 4397719 (1983-08-01), Yoshida
patent: 4476025 (1984-10-01), Chum et al.

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