Global Patent Index - EP 1242353 A1

EP 1242353 A1 2002-09-25 - PROCESS FOR THE RECOVERY AND RECYCLE OF D-TARTARIC ACID

Title (en)

PROCESS FOR THE RECOVERY AND RECYCLE OF D-TARTARIC ACID

Title (de)

VERFAHREN ZUR GEWINNUNG UND WIEDERVERWENDUNG VON D-WEINSÄURE

Title (fr)

PROCEDE DE RECUPERATION ET DE RECYCLAGE D'ACIDE D-TARTRIQUE

Publication

EP 1242353 A1 (EN)

Application

EP 00991215 A

Priority

  • EP 0012946 W
  • US 17337299 P
  • US 47364899 A

Abstract (en)

[origin: WO0147856A1] There is provided a process for the recovery of essentially enantiomerically pure D-tartanic acid from aqueous and organic waste streams generated in the resolution of racemic 2-amino-2,3-dimethylbutyronitrile via the formation and isolation of a crystalline monobasic tartrate salt. The recovered optically pure D-tartaric acid may be efficiently recycled to provide a sustainable resolution of racemic 2-amino-2,3-dimethylbuty-ronitrile.

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

C07C 51/02; C07C 51/41; C07C 51/43; C07C 59/255; C07C 253/34

IPC 8 full level (invention and additional information)

C07C 51/02 (2006.01); C07C 51/41 (2006.01); C07C 51/43 (2006.01); C07C 253/34 (2006.01); C07C 255/25 (2006.01)

CPC (invention and additional information)

C07C 253/34 (2013.01); C07C 51/02 (2013.01); C07C 51/412 (2013.01); C07C 51/43 (2013.01); C07B 2200/07 (2013.01)

Combination set (CPC)

  1. C07C 51/02 + C07C 59/255
  2. C07C 51/412 + C07C 59/255
  3. C07C 51/43 + C07C 59/255
  4. C07C 253/34 + C07C 255/25

Citation (search report)

See references of WO 0147856A1

Designated contracting state (EPC)

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

EPO simple patent family

WO 0147856 A1 20010705; AR 027145 A1 20030312; AU 3160601 A 20010709; BR 0016803 A 20020910; CN 1414939 A 20030430; EP 1242353 A1 20020925; IL 150155 D0 20021201

INPADOC legal status


2004-07-28 [18W] APPLICATION WITHDRAWN

- Effective date: 20040607

2004-01-02 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20031107

2002-09-25 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20020606

2002-09-25 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

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

2002-09-25 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Free text: AL;LT;LV;MK;RO;SI