Global Patent Index - EP 1080064 A1

EP 1080064 A1 2001-03-07 - CONTROLLED OXIDATION OF HYDROCARBONS TO INTERMEDIATE OXIDATION PRODUCTS

Title (en)

CONTROLLED OXIDATION OF HYDROCARBONS TO INTERMEDIATE OXIDATION PRODUCTS

Title (de)

KONTROLLIERTE OXIDATION VON KOHLENWASSERSTOFFEN ZU OXIDATIONSZWISCHENPRODUKTEN

Title (fr)

OXYDATION REGULEE D'HYDROCARBURES EN PRODUITS D'OXYDATION INTERMEDIAIRES

Publication

EP 1080064 A1 (EN)

Application

EP 99918587 A

Priority

  • US 9908296 W
  • US 8615998 P
  • US 8611898 P
  • US 8611998 P
  • US 10191898 P

Abstract (en)

[origin: WO9959953A1] This invention relates to methods of controlling the oxidation of hydrocarbons to respective intermediate oxidation products, e.g., dibasic acids, by adjusting the bulk temperature of the liquid mixture under oxidation by a cooling element, the temperature of which is maintained above a temperature at which solids deposit on the element or a second liquid phase is formed on the element, and/or by maintaining the oxygen concentration in the condenser off-gases to a level preferably lower than 90 % by volume of the flammable oxygen concentration, and/or by feeding oxygen and inert gas (preferably nitrogen) in the reaction zone, the inert gas and the oxygen having a ratio of inert gas to oxygen in the range of preferably 1:5 to 1:200. This invention is particularly applicable in the case of direct oxidation of cyclohexane to adipic acid.

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

C07C 51/16

IPC 8 full level (invention and additional information)

C07C 51/215 (2006.01); C07C 51/31 (2006.01); C07C 55/14 (2006.01)

CPC (invention and additional information)

C07C 51/313 (2013.01)

Combination set (CPC)

C07C 51/313 + C07C 55/14

Citation (search report)

See references of WO 9959953A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 9959953 A1 19991125; AU 3646399 A 19991206; BR 9910513 A 20010904; CA 2331663 A1 19991125; CN 1307555 A 20010808; EP 1080064 A1 20010307; JP 2002515473 A 20020528; MX PA00011514 A 20020424

INPADOC legal status


2002-04-17 [18W] WITHDRAWN

- Ref Legal Event Code: 18W

- Date of withdrawal: 20020225

2001-05-09 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: RPC INC.

- Ref Legal Event Code: RAP1

2001-03-07 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20001208

2001-03-07 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE