EP 1071690 A1 20010131 - METALLOCENE PURIFICATION PROCESS
Title (en)
METALLOCENE PURIFICATION PROCESS
Title (de)
VERFAHREN ZUR REINIGUNG VON METALLOCENEN
Title (fr)
PROCEDE DE PURIFICATION POUR ALLIAGES ORGANOMETALLIQUES
Publication
Application
Priority
- US 9905539 W 19990311
- US 6163698 A 19980416
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
IPC 8 full level
C07F 17/00 (2006.01)
CPC (source: EP)
C07F 17/00 (2013.01)
Citation (search report)
See references of WO 9952919A1
Designated contracting state (EPC)
BE DE ES FR GB IT NL
DOCDB simple family (publication)
WO 9952919 A1 19991021; CA 2328728 A1 19991021; EP 1071690 A1 20010131; JP 2002511477 A 20020416
DOCDB simple family (application)
US 9905539 W 19990311; CA 2328728 A 19990311; EP 99911388 A 19990311; JP 2000543475 A 19990311