摘要:
A precatalyst for the polymerization of α-olefins, having the formula FeuMalc vXw(LA)y(LB)z wherein: - Malc is an alkali metal and/or an alkaline-earth metal. - X is an anion; - LA is a Lewis acid; - LB is a Lewis base; - u is between 0.001 and 10; - v is an integer > 1; - w is between 1 and 20; - y is between 0 and 10; z is between 0 and 10.
摘要:
Telechelic polyolefin of formula (I) and its derivatives: CH 2 =CH-(CH 2 ) p -A-Z wherein: A represents a (co)polymer comprising at least 95 mol % of (CH 2 -CH 2 ) units; Z is selected from the group comprising halogens, thiols and their derivatives, azides, amines, alcohols, the carboxylic acid function, isocyanates, silanes, phosphorous derivatives, dithioesters, dithiocarbamates, dithiocarbonates, trithiocarbonates, alkoxyamines, the vinyl function, dienes, and the group -A- (CH 2 ) p -CH=CH 2 ; p is a whole number between 1 and 20, most advantageously between 6 and 9.
摘要:
The present invention relates to a telechelic polyolefin of formula (III) or (IV) and the process for preparing same, Z-A-(CH 2 ) P -B' (III) Z-A-(CH 2 ) P -B (IV) - A being a polymer chain obtained by homopolymerization of ethylene or by copolymerization of ethylene and an alpha-mono-olefin; - B' being selected from the group comprising N(SiMe 3 ) 2 ; N(SiMe 2 CH 2 CH 2 SiMe 2 ); para-C 6 H 4 (NMe 2 ); para-C 6 H 4 (OMe); C 6 H 4 (N(SiMe 3 ) 2 ); ortho-CH 2 -C 6 H 4 NMe 2 ; ortho-CH 2 -C 6 H 4 OMe; C 6 F 5 ; C 3 F 7 ; C 6 F 13 ; CH(OCH 2 CH 2 O); - B being the function B' or a function deriving from B'; - p being an integer from 0 to 50, advantageously from 0 to 11; Z being a function selected from the group consisting of halogens; thiols; derivatives of thiols; azide; amines; alcohols; a carboxylic acid function; isocyanates; silanes; phosphorus derivatives; dithioesters; dithiocarbamates; dithiocarbonates; trithiocarbonates; alkoxyamines; a vinyl function; dienes; and the group -A-(CH 2 ) P -B'.
摘要:
The invention relates to a solid metal compound comprising (i) a solid support comprising aluminium oxide, (ii) at least one first metal compound (C1) selected from metal hydrides, organometallic compounds and organometallic hydrides, and comprising a metal (M1) selected from the lanthanides, the actinides and the metals of Groups 4 to 7 of the Periodic Table of the Elements, and (iii) at least one second metal compound (C2) comprising a metal (M2) selected from the metals of Groups 8 to 10 of said Table. The compounds (C1) and (C2) are preferably supported on, particularly grafted onto the solid support. The invention also relates to processes for preparing the solid metal compound, preferably comprising stage (1) comprising dispersing and preferably grafting (i) an organometallic precursor (Pr1) comprising the metal (M1) and (ii) a precursor (Pr2) comprising the metal (M2) onto the support, so as to produce the solid metal compound, and preferably stage (2) comprising contacting the solid metal compound thus obtained with hydrogen and/or a reducing agent. The invention also relates to the use of the solid metal compound in processes comprising hydrocarbon reactions optionally in the presence of hydrogen, and preferably involving the splitting and recombining of carbon-carbon and/or carbon-hydrogen and/or carbon-metal bonds, so as to produce final hydrocarbons different from the starting ones. The solid metal compound can be used in processes comprising alkane and/or alkene metathesis, non-oxidative methane coupling, alkene oligomerisation, methane-olysis of hydrocarbons, cross-metathesis and hydrogenolysis of hydrocarbons, e.g. saturated hydrocarbons, hydrocarbon polymers/oligomers or waxes, in the presence of hydrogen.