Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1994-12-09
1996-04-23
Lone, Werren B.
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
568741, 568742, 568748, 568749, 568798, C07C 3768
Patent
active
055105432
ABSTRACT:
The present invention is an improved method for the recovery of phenol from a cleavage mass resulting from the sulfuric acid cleavage of cumene hydroperoxide comprising neutralizing the cleavage mass, forming an aqueous phase and an organic phase, separating the organic phase into an acetone-rich stream and a phenol-rich stream, removing phenol tars from the phenol-rich stream and cracking the phenol tars wherein the improvement comprises maintaining the pH of the cleavage mass during neutralization between 4.0 and about 4.9 whereby the sulfuric acid is converted to the bisulfate salt and substantially no free sulfuric acid remains in the cleavage mass and corrosion of process equipment is reduced.
As a result of this improved process, a phenol tar waste stream containing less than about 4 parts per million by weight of chromium is obtained.
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"Side Reactions in the Phenol/Acetone Process. A Kinetic Study" Ind. Eng. Chem. Res. 1988, 27, 4-7-Pier Luigi Beltrame, Paolo Carniti, Aldo Gamba, Oscar Cappellazzo, Loreno Lorenzoni and Giuseppe Messina.
Fulmer John W.
Griaznov Andrei K.
Kight William D.
Zakoshansky Vladimir M.
General Electric Company
Lone Werren B.
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