April L Ross

US Patent:

8183424, May 22, 2012

Filed:

Dec 20, 2010

Appl. No.:

12/973358

Inventors:

Doron Levin - Highland Park NJ, US
April D. Ross - Beaumont TX, US

Assignee:

ExxonMobil Chemical Patents Inc. - Houston TX

International Classification:

C07C 6/12

US Classification:

585323, 585475

Abstract:

In a process for producing xylene by transalkylation of a C+ aromatic hydrocarbon feedstock with a Cand/or Caromatic hydrocarbon, the C+ aromatic hydrocarbon feedstock, at least one Cand/or Caromatic hydrocarbon and hydrogen are contacted with a first catalyst comprising (i) a first molecular sieve having a Constraint Index in the range of about 3 to about 12 and (ii) at least first and second different metals or compounds thereof of Groups 6 to 12 of the Periodic Table of the Elements. Contacting with the first catalyst is conducted under conditions effective to dealkylate aromatic hydrocarbons in the feedstock containing C+ alkyl groups and to saturate C+ olefins formed so as to produce a first effluent. At least a portion of the first effluent is then contacted with a second catalyst comprising a second molecular sieve having a Constraint Index less than 3 under conditions effective to transalkylate C+ aromatic hydrocarbons with said at least one C-Caromatic hydrocarbon to form a second effluent comprising xylene.

US Patent:

8481443, Jul 9, 2013

Filed:

Apr 18, 2012

Appl. No.:

13/449758

Inventors:

Doron Levin - Highland Park NJ, US
April D. Ross - Beaumont TX, US

Assignee:

ExxonMobil Chemical Patents Inc. - Houston TX

International Classification:

B01J 29/06
B01J 8/04

US Classification:

502 69, 502 63, 502 64, 502 66, 502 67, 502 71, 502 74, 502 77, 502 78, 502 79, 422634

Abstract:

In a process for producing xylene by transalkylation of a C+aromatic hydrocarbon feedstock with a Cand/or Caromatic hydrocarbon, the C+aromatic hydrocarbon feedstock, at least one Cand/or Caromatic hydrocarbon and hydrogen are contacted with a first catalyst under conditions effective to dealkylate aromatic hydrocarbons in the feedstock containing C+alkyl groups and to saturate C+olefins formed so as to produce a first effluent. At least a portion of the first effluent is then contacted with a second catalyst under conditions effective to transalkylate C+aromatic hydrocarbons with said at least one C-Caromatic hydrocarbon to form a second effluent comprising xylene.

US Patent:

20110263918, Oct 27, 2011

Filed:

Apr 6, 2011

Appl. No.:

13/081351

Inventors:

John Di-Yi Ou - Houston TX, US
April D. Ross - Beaumont TX, US
Doron Levin - Highland Park NJ, US
Mohan Kalyanaraman - Media PA, US
Wenyih Frank Lai - Bridgewater NJ, US

International Classification:

C07C 5/22
B01J 29/40
C01B 39/38

US Classification:

585481, 585477, 585480, 423700, 502 77, 502 71, 502 68

Abstract:

The invention concerns a xylenes isomerization process for the production of equilibrium or near-equilibrium xylenes. The process utilizes a catalyst comprising HZSM-5 or MCM-49 and process conditions including a temperature of less than 295 C. and a pressure sufficient to maintain the xylenes in liquid phase. In embodiments, the process can be operated in a continuous mode with ppm levels of dissolved Hin the feed and in other embodiments in a cyclic mode without the Hin feed but with periodic regenerations using a feed having low ppm levels of H.

US Patent:

20170183580, Jun 29, 2017

Filed:

Dec 27, 2016

Appl. No.:

15/390896

Inventors:

- Annandale NJ, US
Doron Levin - Highland Park NJ, US
Himanshu Gupta - Lebanon NJ, US
James R. Lattner - LaPorte TX, US
Glenn C. Wood - Houston TX, US
Keith K. Aldous - Montgomery TX, US
Timothy L. Hilbert - Middleburg VA, US
Michael B. Carroll - Center Valley PA, US
Ajit B. Dandekar - Clinton NJ, US
Sara L. Yohe - Raritan NJ, US
Stephen H. Brown - Lebanon NJ, US
Tracie L. Owens - Houston TX, US
April D. Ross - Clinton NJ, US
Eric B. Senzer - Margate FL, US
Steven Pyl - Annandale NJ, US

International Classification:

C10G 67/04
C10M 101/02

Abstract:

Methods are provided for producing lubricant base stocks from deasphalted oils formed by sequential deasphalting. The deasphalted oil can be exposed a first deasphalting process using a first solvent that can provide a lower severity of deasphalting and a second deasphalting process using a second solvent that can provide a higher severity of deasphalting. This can result in formation of at least a deasphalted oil and a resin fraction. The resin fraction can represent a fraction that traditionally would have been included as part of a deasphalter rock fraction.