Global Patent Index - EP 1042262 A1

EP 1042262 A1 2000-10-11 - METHOD FOR PRODUCING ALKYLENE GLYCOL WITH A LOW CARBONYL COMPOUND CONTENT

Title (en)

METHOD FOR PRODUCING ALKYLENE GLYCOL WITH A LOW CARBONYL COMPOUND CONTENT

Title (de)

VERFAHREN ZUR HERSTELLUNG VON ALKYLENGLYKOL MIT NIEDRIGEM GEHALT AN CARBONYLVERBINDUNGEN

Title (fr)

PROCEDE DE PREPARATION D'ALKYLENEGLYCOL A FAIBLE TENEUR EN COMPOSES CARBONYLE

Publication

EP 1042262 A1 (DE)

Application

EP 98966409 A

Priority

  • DE 19757711 A
  • EP 9808462 W

Abstract (en)

[origin: DE19757711A1] The invention relates to a method for obtaining alkylene glycol with a low aldehyde content. According to said method, a mixture containing alkylene glycol is subjected to a definitive distillation process, said mixture containing formic acid or a formiate or a mixture of two or more formiates or a mixture of formic acid and one or more formiates.

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

C07C 29/80; C07C 29/94; C07C 29/10

IPC 8 full level (invention and additional information)

C07C 31/20 (2006.01); C07C 29/10 (2006.01); C07C 29/80 (2006.01); C07C 29/94 (2006.01)

CPC (invention and additional information)

C07C 29/80 (2013.01); C07C 29/106 (2013.01); C07C 29/94 (2013.01); Y02P 20/52 (2015.11)

Combination set (CPC)

  1. C07C 29/106 + C07C 31/202
  2. C07C 29/80 + C07C 31/202
  3. C07C 29/94 + C07C 31/202

Designated contracting state (EPC)

BE CH DE ES FR GB IT LI NL

EPO simple patent family

DE 19757711 A1 19990701; CA 2314507 A1 19990708; CN 1283173 A 20010207; EP 1042262 A1 20001011; JP 2001527057 A 20011225; US 6329558 B1 20011211; WO 9933774 A1 19990708

INPADOC legal status


2003-10-22 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20030416

2002-04-03 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20020213

2000-10-11 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000522

2000-10-11 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

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