Global Patent Index - EP 0988354 A1

EP 0988354 A1 2000-03-29 - HYDROCARBON CRACKING WITH POSITIVE REACTOR TEMPERATURE GRADIENT

Title (en)

HYDROCARBON CRACKING WITH POSITIVE REACTOR TEMPERATURE GRADIENT

Title (de)

KOHLENWASSERSTOFKRACKUNG MIT POSITIVEN REAKTOR-TEMPERATURGRADIENT

Title (fr)

CRAQUAGE D'HYDROCARBURES A GRADIENT DE TEMPERATURE DE REACTEUR POSITIF

Publication

EP 0988354 A1 (EN)

Application

EP 98926448 A

Priority

  • US 9811875 W
  • US 87258597 A

Abstract (en)

[origin: WO9856873A1] The invention provides an improvement in processes for cracking hydrocarbons to prime olefins, ethylene and propylene, which comprises applying a positive temperature gradient across a catalyst contact zone. The temperature gradient may be uniform or stepwise, may be one reactor or a series of reactors so long as at least one down stream cracking zone is operated at a higher temperature than an upstream zone.

IPC 1-7 (main, further and additional classification)

C10G 11/00; C07C 4/06; C10G 51/02

IPC 8 full level (invention and additional information)

C07B 61/00 (2006.01); C07C 4/06 (2006.01); C07C 11/04 (2006.01); C07C 11/06 (2006.01); C10G 11/00 (2006.01); C10G 11/05 (2006.01); C10G 51/02 (2006.01)

CPC (invention and additional information)

C07C 4/06 (2013.01); C07C 2529/08 (2013.01); C07C 2529/18 (2013.01); C07C 2529/40 (2013.01); C07C 2529/50 (2013.01); C07C 2529/60 (2013.01); C07C 2529/65 (2013.01); C07C 2529/70 (2013.01); C07C 2529/86 (2013.01); C07C 2529/87 (2013.01); C07C 2529/88 (2013.01); C07C 2529/89 (2013.01); C10G 2400/20 (2013.01)

Citation (search report)

See references of WO 9856873A1

Designated contracting state (EPC)

BE DE FR GB IT NL

EPO simple patent family

WO 9856873 A1 19981217; AU 7828598 A 19981230; CA 2290460 A1 19981217; CN 1259983 A 20000712; EP 0988354 A1 20000329; JP 2002504169 A 20020205

INPADOC legal status


2002-08-07 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20020101

2001-05-30 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: EXXONMOBIL CHEMICAL PATENTS INC.

2000-03-29 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19991222

2000-03-29 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): BE DE FR GB IT NL