Yongqiang Xu

US Patent:

20140018584, Jan 16, 2014

Filed:

Jul 12, 2012

Appl. No.:

13/547164

Inventors:

Yongqiang Xu - Pasadena TX, US
Gary G. Podrebarac - Pasadena TX, US

Assignee:

LUMMUS TECHNOLOGY INC. - Bloomfield NJ

International Classification:

C07C 5/08
C07C 5/03
B01J 19/00
C07C 4/06

US Classification:

585251, 585259, 422187

Abstract:

A process for the conversion of linear pentenes to propylene is disclosed. The process may include feeding hydrogen and a C5-olefin containing stream comprising linear pentenes, dienes, acetylenes, and cyclopentene to a catalytic distillation reactor system. Concurrently in the catalytic distillation reactor system, the acetylenes and dienes may be hydrogenated and the C5-olefin containing stream may be fractionated, thereby recovering an overheads fraction comprising the linear pentenes, a side draw fraction comprising the cyclopentene, and a bottoms fraction. In some embodiments, at least a portion of the overheads fraction may then be fed to a metathesis reactor for converting the linear pentenes to propylene.

US Patent:

20100063334, Mar 11, 2010

Filed:

Sep 8, 2008

Appl. No.:

12/206039

Inventors:

Montri Vichailak - Houston TX, US
Purvis K. Ho - Houston TX, US
Martinus J. Almering - Pasadena TX, US
Arvids Judzis, JR. - Pasadena TX, US
Willibrord A. Groten - Pasadena TX, US
Yongqiang Xu - Pasadena TX, US

Assignee:

CATALYTIC DISTILLATION TECHNOLOGIES - Pasadena TX

International Classification:

C07C 7/163

US Classification:

585258

Abstract:

A process for reducing the concentration of benzene in a hydrocarbon stream, the process including: fractionating a reformate to form a benzene concentrate fraction comprising benzene and other Chydrocarbons, and a heavies fraction comprising C hydrocarbons; and hydrogenating the benzene concentrate fraction to form a hydrocarbon fraction having a reduced benzene concentration.