Global Patent Index - EP 1009733 A1

EP 1009733 A1 2000-06-21 - PROCESS FOR PREPARING ASPARTIC ACID FROM AMMONIUM ASPARTATE, AND CONTINUOUS PROCESS FOR PREPARING POLYSUCCINIMIDE INVOLVING SUCH PROCESS

Title (en)

PROCESS FOR PREPARING ASPARTIC ACID FROM AMMONIUM ASPARTATE, AND CONTINUOUS PROCESS FOR PREPARING POLYSUCCINIMIDE INVOLVING SUCH PROCESS

Title (de)

VERFAHREN ZUR HERSTELLUNG VON ASPARAGINSÄURE AUS AMMONIUM ASPARTAT, UND KONTINUIERLICHES VERFAHREN ZUR HERSTELLUNG DES POLYSUCCINIMIDS MIT DIESEM VERFHAREN

Title (fr)

PROCEDE DE PREPARATION D'ACIDE ASPARTIQUE A PARTIR D'ASPARTATE D'AMMONIUM ET PROCESSUS DE PREPARATION EN CONTINU DE POLYSUCCINIMIDE FAISANT INTERVENIR CE PROCEDE

Publication

EP 1009733 A1 (EN)

Application

EP 98946382 A

Priority

  • EP 98946382 A
  • EP 9805268 W
  • EP 97202722 A

Abstract (en)

[origin: EP0902010A1] The invention relates to a process for the (continuous) preparation of aspartic acid by decomposition of ammonium aspartate in which a concentrated aqueous solution of ammonium aspartate is constantly introduced into a diluent in which water has a low solubility, which diluent is maintained at a temperature at which ammonium aspartate decomposes into aspartic acid and ammonia, and in which the water and the formed ammonia are continuously removed. The invention also relates to a (continuous) process for preparing polysuccinimide starting from fumaric or maleic acid and ammonia involving said process for preparing aspartic acid from ammonium aspartate. <IMAGE>

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

C07C 227/18; C08G 69/10

IPC 8 full level (invention and additional information)

C07C 227/18 (2006.01); C07C 229/24 (2006.01); C08G 69/10 (2006.01); C08G 73/10 (2006.01)

CPC (invention and additional information)

C08G 73/1092 (2013.01); C07C 227/18 (2013.01); C08G 69/10 (2013.01)

Combination set (CPC)

C07C 227/18 + C07C 229/24

Citation (search report)

See references of WO 9911603A1

Designated contracting state (EPC)

AT BE CH DE DK ES FR GB IE IT LI MC NL SE

EPO simple patent family

EP 0902010 A1 19990317; AU 9344498 A 19990322; EP 1009733 A1 20000621; JP 2003524576 A 20030819; WO 9911603 A1 19990311

INPADOC legal status


2004-03-31 [18W] WITHDRAWN

- Effective date: 20040204

2000-06-21 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000212

2000-06-21 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

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