Acidification/extraction treatment of waste caustic stream

Details Acidification/extraction treatment of waste caustic stream Acidification/extraction treatment of waste caustic stream

1995-10-04

1997-10-07

Griffin, Walter D.

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

By addition of extraneous agent, e.g., solvent, etc.

585865, 585866, 585867, C07C 717, C07C 700

Patent

active

056750552

ABSTRACT:
The waste organics containing caustic stream from a propylene oxide/styrene monomer process is preferably first concentrated by distillation and then contacted with strong acid such as sulfuric acid and an organic solvent, the admixture is phase separated and an aqueous sodium containing phase reduced in organics is separated from an organic solvent phase reduced in sodium.

REFERENCES:
patent: 4066706 (1978-01-01), Schmidt
patent: 4315896 (1982-02-01), Taylor et al.
patent: 4405572 (1983-09-01), Moore et al.
patent: 5171868 (1992-12-01), Albal et al.
patent: 5210354 (1993-05-01), Dubner et al.
patent: 5276235 (1994-01-01), Dubner

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