David D Gates

US Patent:

6387245, May 14, 2002

Filed:

Sep 26, 2000

Appl. No.:

09/669791

Inventors:

Tom N. Kalnes - La Grange IL
David B. Gates - Schaumburg IL

Assignee:

UOP LLC - Des Plaines IL

International Classification:

C10G 6902

US Classification:

208 58, 208 57, 208 59, 208 83, 208108, 20811101

Abstract:

A hydrocracking process wherein a hydrocarbonaceous feedstock and a hot hydrocracking zone effluent containing hydrogen is passed to a hydrocracking reaction zone to produce lower boiling hydrocarbon compounds. The resulting hot, uncooled effluent from the hydrocracking zone is hydrogen stripped in a stripping zone maintained at essentially the same pressure as the preceding hydrocracking reaction zone with a hydrogen-rich gaseous stream to produce a vapor stream comprising hydrogen, hydrocarbonaceous compounds boiling at a temperature below the boiling range of the fresh feedstock, hydrogen sulfide and ammonia, and a liquid hydrocarbonaceous stream which is countercurrently contacted with hydrogen in a hydrogenation zone located in the bottom end of the stripping zone.

US Patent:

6596155, Jul 22, 2003

Filed:

Sep 26, 2000

Appl. No.:

09/669790

Inventors:

David B. Gates - Schaumburg IL
Tom N. Kalnes - La Grange IL

Assignee:

UOP LLC - Des Plaines IL

International Classification:

C10G 6902

US Classification:

208 89, 208 58, 208 59, 208 83, 208108, 20811101, 208210

Abstract:

A hydrocracking process wherein a hydrocarbonaceous feedstock and a hot hydrocracking zone effluent containing hydrogen is passed to a denitrification and desulfurization reaction zone to produce hydrogen sulfide and ammonia to thereby clean up the fresh feedstock. The resulting hot, uncooled effluent from the denitrification and desulfurization zone is hydrogen stripped in a stripping zone maintained at essentially the same pressure as the preceding reaction zone with a hydrogen-rich gaseous stream to produce a vapor stream comprising hydrogen, hydrocarbonaceous compounds boiling at a temperature below the boiling range of the fresh feedstock, hydrogen sulfide and ammonia, and a liquid hydrocarbonaceous stream which is countercurrently contacted with hydrogen in a hydrogenation zone located in the bottom end of the stripping zone.