Global Patent Index - EP 0888295 A4

EP 0888295 A4 2000-12-06 - SYNTHESIS OF ANIONIC CLEANING AGENTS

Title (en)

SYNTHESIS OF ANIONIC CLEANING AGENTS

Title (de)

SYNTHESE VON ANIONISCHEN REINIGUNGSMITTELN

Title (fr)

SYNTHESE D'AGENTS DE NETTOYAGE ANIONIQUES

Publication

EP 0888295 A4 (EN)

Application

EP 97901911 A

Priority

  • GB 9601880 A
  • US 9700082 W

Abstract (en)

[origin: MX9806220A] There is provided a method of synthesis of a disulfated cleaning agent from a substituted cyclic anhydride, particularly a substituted succinic anhydride, having one or more carbon chain substituents comprising in total at least 5 carbon atoms comprising the following steps: (i) reduction of said substituted cyclic anhydride to form a diol; (ii) optionally, alkoxylation of said diol to form an alkoxylated diol; and (iii) sulfation of said diol to form a disulfate, wherein said reduction step comprises hydrogenation in the presence of a transition metal-containing hydrogenation catalyst. The hydrogenation is carried out under pressure.

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

C07C 303/24; C07C 29/147; C11D 1/16; C11D 1/29

IPC 8 full level (invention and additional information)

C07C 29/147 (2006.01); C07C 303/24 (2006.01); C07C 305/06 (2006.01); C11D 1/16 (2006.01); C11D 1/29 (2006.01); C11D 11/00 (2006.01); C07C 305/10 (2006.01)

CPC (invention and additional information)

C11D 1/29 (2013.01); C07C 29/147 (2013.01); C07C 303/24 (2013.01); C11D 1/16 (2013.01)

Combination set (CPC)

  1. C07C 303/24 + C07C 305/10
  2. C07C 29/147 + C07C 31/20

Citation (search report)

Designated contracting state (EPC)

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

EPO simple patent family

GB 2310206 A 19970820; GB 9601880 D0 19960403; AR 005605 A1 19990623; BR 9707225 A 19990720; CN 1214040 A 19990414; EP 0888295 A1 19990107; EP 0888295 A4 20001206; JP H11503485 A 19990326; MX 9806220 A 19981031; WO 9728119 A1 19970807

INPADOC legal status


2001-02-21 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20000801

2000-12-06 [A4] SUPPLEMENTARY SEARCH REPORT

- Effective date: 20001025

2000-12-06 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A4

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

2000-12-06 [RIC1] CLASSIFICATION (CORRECTION)

- Free text: 7C 07C 303/24 A, 7C 07C 29/147 B, 7C 11D 1/16 B, 7C 11D 1/29 B

1999-01-07 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19980805

1999-01-07 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

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