Larry A Wolf

US Patent:

51222345, Jun 16, 1992

Filed:

Feb 4, 1991

Appl. No.:

7/650253

Inventors:

Saul L. Elishewitz - Philadelphia PA
Clifford M. Gilpin - Churchville PA
Gerald E. Hollenbach - Feasterville PA
John J. Santarsiero - Mt. Laurel NJ
William J. Moffatt - Flossmoor IL
David B. Lebowitz - Cherry Hill NJ
Dodd S. Smith - Schweiksville PA
Larry B. Wolf - Colonial Heights VA

Assignee:

Allied-Signal Inc. - Morristownship NJ

International Classification:

B01D 342
C07C 3774

US Classification:

203 1

Abstract:

This invention is a continuous process for preparing phenol having improved clarity when dispersed in water. The phenol is prepared from crude phenol being the product of decomposition of cumene hydroperoxide and having previously been distilled to remove large portions of acetone, cumene and alphamethyl styrene. The continuous process requires a) introducing the crude phenol as a feed to a fractional distillation column, b) heating the bottoms of the fractional distillation column to vaporize the phenol and lower boiling components of the crude phenol, c) removing those components of the crude phenol boiling higher than phenol from the bottom of the distillation column, d) removing substantially dry liquid phenol product with improved clarity from the distillation column at a point at least one theoretical stage from the top of the column, e) adding water to the top of the fractional distillation column in a sufficient amount to improve the clarity of the phenol product, f) removing a condensed liquid phenol-water mixture containing impurities overhead from the top of the fractional distillation column, and g) returning a portion of the phenol-water mixture to the top of the fractional distillation column as reflux.