Pyrolysis of black liquor at high temperatures using radiant energy
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United States of America Patent
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Jan 20, 1987
Grant Date -
N/A
app pub date -
Feb 25, 1985
filing date -
Feb 25, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
This invention is a process for recovering sodium hydroxide directly from black liquor. The process involves pyrolyzing the black liquor in the absence of oxygen to produce a product containing sodium carbide, and hydrolyzing the sodium carbide to form sodium hydroxide. The pyrolysis is carried out at about 4000.degree. F. using radiant energy.
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