Timothy W Cowan

US Patent:

20120031811, Feb 9, 2012

Filed:

Aug 9, 2010

Appl. No.:

12/852984

Inventors:

Timothy M. Cowan - Sudbury MA, US
Vedula K. Murty - Willowbrook IL, US

Assignee:

UOP LLC - Des Plaines IL

International Classification:

C10G 45/02
B01J 19/00
C10G 47/02

US Classification:

208 57, 208108, 422105

Abstract:

A hydrocracking zone for the selective production of either a naphtha product stream or a middle distillate stream from a hydrocarbonaceous feedstock utilizing a fixed catalyst and varying the ammonia concentration level introduced to the hydrocracking zone. The ammonia can be obtained by the reaction of nitrogen in the hydrocarbonaceous feedstock in a hydrotreating reactor, or from an external ammonia source, where the ammonia concentration is controlled by a stripping zone which allows an ammonia concentration in the range of about 0 to about 50 wppm to be introduced into the hydrocracking zone to yield a naphtha stream and an ammonia concentration in the range of about 20 to about 200 wppm to be introduced into the hydrocracking zone to yield a middle distillate stream.