John J Rodden

US Patent:

58464042, Dec 8, 1998

Filed:

Sep 15, 1994

Appl. No.:

8/306858

Inventors:

Raymond Tom Fong - Benicia CA
John Bernard Rodden - Houston TX
Jack Thomas Veal - Sugar Land TX
Charles Lee Meyer - Houston TX
Michael Norris Treybig - Houston TX
Coley Jerald Williams - Kingwood TX
Richard Joseph Horvath - Spring TX

Assignee:

Shell Oil Company - Houston TX

International Classification:

C10G 914

US Classification:

208131

Abstract:

A selenium-containing aqueous stream may be used as a quenching water stream and optionally a cutting water stream in a delayed coking process to effectuate the removal of selenium from the selenium-containing aqueous stream resulting in the formation of a selenium-coke product. In addition, selenium may be concentrated in selenium-containing stripped sour water streams by recycling the stream in one or more hydroprocessing units and one or more sour water stripper units and subsequently removed by using a portion of the selenium-containing stripped sour water stream as a quenching water stream and optionally a cutting water stream in a delayed coking process.