Global Patent Index - EP 0971777 A4

EP 0971777 A4 2000-04-26 - METHOD FOR RECOVERING ALKANOLS FROM AQUEOUS HBr SOLUTIONS

Title (en)

METHOD FOR RECOVERING ALKANOLS FROM AQUEOUS HBr SOLUTIONS

Title (de)

VERFAHREN ZUR RÜCKGEWINNUNG VON ALKANOLEN AUS HBR-LÖSUNGEN

Title (fr)

PROCEDE POUR RECUPERER LES ALCANOLS CONTENUS DANS DES SOLUTIONS D'HBr AQUEUX

Publication

EP 0971777 A4 (EN)

Application

EP 98915298 A

Priority

  • US 9806760 W
  • US 4390397 P
  • US 86413997 A

Abstract (en)

[origin: WO9843717A1] The present invention provides processes for recovering alkanols from fluids comprising the alkanol and aqueous hydrobromic acid without forming excessive amounts of alkyl bromide. In certain aspects of the invention, there are provided distillation systems wherein a fluid comprising an alkanol and aqueous hydrobromic acid is introduced into a distillation column at a point between the bottom and the top of the column to thereby separate the alkanol and the hydrobromic acid without causing the production of significant amount of alkyl bromide.

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

B01D 3/34; B01D 3/14; C01B 7/09; C07C 27/00; C07C 29/124; C07C 37/68

IPC 8 full level (invention and additional information)

B01D 3/00 (2006.01); B01D 3/14 (2006.01); B01D 5/00 (2006.01); C01B 7/09 (2006.01); C07C 29/124 (2006.01); C07C 29/80 (2006.01); C07C 31/04 (2006.01); C07C 31/08 (2006.01); C07C 31/10 (2006.01)

CPC (invention and additional information)

C07C 29/80 (2013.01); B01D 3/14 (2013.01); B01D 5/0063 (2013.01); C01B 7/093 (2013.01)

Combination set (CPC)

  1. C07C 29/80 + C07C 31/04
  2. C07C 29/80 + C07C 31/08
  3. C07C 29/80 + C07C 31/10
  4. C07C 29/80 + C07C 31/12
  5. C07C 29/80 + C07C 31/125

Citation (search report)

Designated contracting state (EPC)

BE DE FR GB IT NL

EPO simple patent family

WO 9843717 A1 19981008; EP 0971777 A1 20000119; EP 0971777 A4 20000426; IL 132140 D0 20010319; JP 2001518884 A 20011016; KR 20010005937 A 20010115

INPADOC legal status


2001-01-31 [18W] WITHDRAWN

- Date of withdrawal: 20001128

2000-04-26 [A4] SUPPLEMENTARY SEARCH REPORT

- Effective date: 20000315

2000-04-26 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A4

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

2000-04-19 [RIC1] CLASSIFICATION (CORRECTION)

- Free text: 7B 01D 3/34 A, 7C 07C 27/00 B, 7C 07C 29/124 B, 7B 01D 3/14 B, 7C 01B 7/09 B, 7C 07C 37/68 B

2000-01-19 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19991025

2000-01-19 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

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