Global Patent Index - EP 1071690 A1

EP 1071690 A1 2001-01-31 - METALLOCENE PURIFICATION PROCESS

Title (en)

METALLOCENE PURIFICATION PROCESS

Title (de)

VERFAHREN ZUR REINIGUNG VON METALLOCENEN

Title (fr)

PROCEDE DE PURIFICATION POUR ALLIAGES ORGANOMETALLIQUES

Publication

EP 1071690 A1 (EN)

Application

EP 99911388 A

Priority

  • US 9905539 W
  • US 6163698 A

Abstract (en)

[origin: WO9952919A1] Group 4 metallocenes are separated from hydrocarbonaceous tarry material typically formed during their synthesis. This is done by mixing polar organic solvent and non-polar organic solvent with the impure mixture, these solvents being substantially incompatible with each other (e.g., acetonitrile and hexanes), so that after the mixing there are formed at least two separate phases comprising (i) a polar phase comprising mostly metallocene and the polar solvent, and (ii) a non-polar phase comprising mostly non-polar organic solvent and hydrocarbonaceous tarry material, and some metallocene. After separating these phases the non-polar phase is extracted with fresh polar organic solvent to form another polar phase comprising mainly metallocene and polar organic solvent. The metallocene can then be recovered from the polar phases, for example by distillation.

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

C07F 17/00

IPC 8 full level (invention and additional information)

C07F 17/00 (2006.01)

CPC (invention and additional information)

C07F 17/00 (2013.01)

Citation (search report)

See references of WO 9952919A1

Designated contracting state (EPC)

BE DE ES FR GB IT NL

EPO simple patent family

WO 9952919 A1 19991021; CA 2328728 A1 19991021; EP 1071690 A1 20010131; JP 2002511477 A 20020416

INPADOC legal status


2002-10-09 [18R] REFUSED

- Effective date: 20020520

2001-08-08 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20010621

2001-01-31 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20001113

2001-01-31 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

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