EP 0910470 A4 20000809 - HIGH ACTIVITY CATALYSTS FOR THE PREPARATION OF POLYETHYLENE WITH AN INTERMEDIATE MOLECULAR WEIGHT DISTRIBUTION

Title (en)

HIGH ACTIVITY CATALYSTS FOR THE PREPARATION OF POLYETHYLENE WITH AN INTERMEDIATE MOLECULAR WEIGHT DISTRIBUTION

Title (de)

KATALYSATOREN MIT HOHER AKTIVITÄT ZUR HERSTELLUNG VON POLYETHYLEN MIT MITTLERER MOLEKULARGEWICHTSVERTEILUNG

Title (fr)

CATALYSEURS A FORTE ACTIVITE POUR LA PREPARATION DE POLYETHYLENE AVEC UNE REPARTITION INTERMEDIAIRE DES POIDS MOLECULAIRES

Publication

EP 0910470 A4 20000809 (EN)

Application

EP 97932291 A 19970625

Priority

US 9711078 W 19970625
US 67716396 A 19960711

Abstract (en)

[origin: WO9802245A1] A supported alpha-olefin polymerization catalyst composition of this invention of improved activity as measured by productivity is prepared in a multi-step process. An ethylene homopolymerization or ethylene copolymerization catalyst is formed by: (i) providing a slurry of a solid porous inorganic support having reactive hydroxyl (-OH) groups and a non-polar solvent; (ii) impregnating said support having -OH groups, with RMgR' compound, to form an intermediate, which intermediate has an -OH group:Mg ratio of less than 1, wherein each of said R and R' is alkyl of 1 to 12 carbon atoms and is the same or different; (iii) treating the intermediate with TiC14 to form a titanium containing intermediate which has an -OH group:Ti ratio of less than 1; (iv) reacting the titanium containing intermediate with an amount of oxygen containing electron donor containing 1 to 15 carbon atoms, combining the electron donor treated titanium containing intermediate with triethylaluminum to form the catalyst. The catalyst also produces polymers having relatively intermediate molecular weight distribution.

IPC 1-7

B01J 31/26; B01J 31/32

IPC 8 full level

B01J 31/12 (2006.01); B01J 31/14 (2006.01); B01J 31/26 (2006.01); B01J 31/32 (2006.01); B01J 31/38 (2006.01); C08F 4/60 (2006.01); C08F 4/654 (2006.01); C08F 4/658 (2006.01); C08F 10/00 (2006.01); C08F 10/02 (2006.01)

CPC (source: EP KR)

B01J 31/122 (2013.01 - EP); B01J 31/143 (2013.01 - EP); B01J 31/26 (2013.01 - KR); B01J 31/38 (2013.01 - EP); C08F 10/00 (2013.01 - EP); Y02P 20/52 (2015.11 - EP)

Citation (search report)

[Y] WO 9409041 A1 19940428 - MOBIL OIL CORP [US]
[Y] US 4301029 A 19811117 - CAUNT ANTHONY D, et al
See references of WO 9802245A1

Designated contracting state (EPC)

BE DE ES FR GB IT NL

DOCDB simple family (publication)

WO 9802245 A1 19980122; AU 3578797 A 19980209; AU 715831 B2 20000210; CA 2260026 A1 19980122; EP 0910470 A1 19990428; EP 0910470 A4 20000809; JP 2000514492 A 20001031; KR 20000023620 A 20000425; TW 494111 B 20020711

DOCDB simple family (application)

US 9711078 W 19970625; AU 3578797 A 19970625; CA 2260026 A 19970625; EP 97932291 A 19970625; JP 50603798 A 19970625; KR 19997000069 A 19990108; TW 86109623 A 19970708