Stephen C Cowan

US Patent:

52425495, Sep 7, 1993

Filed:

Dec 6, 1991

Appl. No.:

7/802798

Inventors:

Michael W. Potter - Sugarland TX
Stephen W. Cowan - Tomball TX
Robert S. Tomaskovic - Houston TX

Assignee:

Shell Oil Company - Houston TX

International Classification:

B01D 334
C01G 2302
C07C 1738

US Classification:

203 6

Abstract:

An improved process for separation of valuable components of a waste stream resulting from production of an olefin polymerization procatalyst by the addition to the waste stream of a separation solvent of intermediate boiling point, subjecting the resulting mixture to a first distillation zone to separate the desired waste stream components from the upper portion of the zone and passing the bottoms product to a second distillation zone wherein separation solvent is recovered from the upper portion of the zone for recycle and passing the bottoms product to disposal or further processing.