Recovery of chemicals from pulp waste liquor with plasma generator heating
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United States of America Patent
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Jul 22, 1986
Grant Date -
N/A
app pub date -
Apr 6, 1984
filing date -
Apr 21, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to the recovery of chemicals from waste liquor from wood pulp process, primarily black liquor, while utilizing energy liberated. Controlled total vaporization of the pulp waste liquor at high temperature and low oxygen potential is achieved by the external supply of energy. During the subsequent condensation and separation a melt or water solution is obtained which, without causticizing, can be used for the preparation of white liquor, and also an energy rich gas and mainly free from sulphur, consisting primarily of carbon monoxide and hydrogen.
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