摘要:
A catalyst component for polymerization of olefins which is prepared by reacting a magnesium alkoxide with a silicon compound having at least one hydrogen-silicon bond, contacting the reaction product with a carboxylic acid halide and/or carboxylic acid anhydride, and contacting the resulting contact product with a titanium compound.
摘要:
A titanium halide containing catalyst component for polymerization of olefins which is prepared by reacting a magnesium hydrocarbyloxide with a silicon compound having at least one hydrogen-silicon bond, contacting the reaction product with an electron donor compound, contacting the resulting contact product two or more times with a titanium halide and between one of the multiple titanium halide contacts, contacting the titanium halide contacted solid with a halide of an element selected from the group consisting of elements of Groups IIIa, IVa, and Va of the Periodic Table of elements.
摘要:
A titanium-containing catalyst component for polymerization of olefins which is prepared by reacting a magnesium hydrocarbyl oxide with a silicon compound having a hydrogen-silicon bond, contacting the reaction product with an electron donor compound, contacting the resulting contact product with an organoaluminum compound and further with a titanium compound.
摘要:
A titanium trichloride catalytic complex is produced by reducing titanium tetrachloride with an organo-metal compound and then treating the resulting reduced solids product with a chlorinated saturated aliphatic hydrocarbon having three to eight carbon atoms in the presence of a complexing agent. The resulting titanium trichloride complex composition, when employed as a co-catalyst with an organo-metal compound for Ziegler-type catalysts in polymerization of .alpha.-olefins, results in uniform polymer grains with unexpectedly high polymerization activity and high stereoregular polymer yielding ratios.
摘要:
A process for producing a magnesium containing support for titanium comprising contacting magnesium metal, a halogenated hydrocarbon and a compound represented by the formula X'.sub.m C(OR').sub.4-m wherein X' is a hydrogen atom, a halogen atom or a C.sub.1 -C.sub.10 alkyl, aryl, cycloalkyl or halogenated alkyl, aryl, cycloalkyl group, R' is a C.sub.1 -C.sub.20 alkyl, aryl or cycloalkyl group and m is 0, 1 or 2 to form a magnesium-containing solid represented by the formula R'OMgX and thereafter contacting the magnesium-containing solid with a Lewis base or a compound which can form an ester such as benzoyl chloride and a titanium compound such as titanium tetrachloride. The obtained magnesium supported titanium composition is useful as a catalyst component in combination with a co-catalyst organoaluminum compound for the polymerization of olefins.
摘要:
A supported titanium catalyst, adaptable for use in the stereoregular polymerization of .alpha.-olefins, is produced by treating a supported titanium-containing solid, obtained by cogrinding a magnesium halide, tetravalent titanium halide and organic acid ester, with a hydrocarbon, organo halogen compound or mixture thereof with heating. The resulting supported titanium catalyst, when employed as a titanium component with an organo aluminum catalyst component for the catalyst system in a process for stereoregular polymerization of .alpha.-olefins, produces high polymerization activity and unexpectedly high stereoregular polymer yielding ratios.
摘要:
A process for the production of a catalyst component for use in the polymerization of .alpha.-olefins, which comprises reducing titanium tetrachloride with an organo aluminum compound having the general formula Al Rn X.sub.3-n wherein R represents a hydrocarbon group having 1 to 18 carbon atoms, x represents a halogen atom and n represents a suitable numeral between o
摘要:
This invention relates to a catalyst composition for polymerization of propylene, having high activity and producing polypropylene of high stereoregularity and having a low particle size distribution, which comprises;1. reducing TiCl.sub.4 by diethylaluminum chloride (DEAC), thereby forming a reduced solid (TiCl.sub.3),2. removing the aluminum compounds from the reduced catalyst,3. treating the said reduced solid with the mixture or complex of TiCl.sub.4 and diisoamylether (IAE) and4. separating the solid catalyst from the mixture.The aluminum compounds may be removed by washing with a complexing agent therefor; in a preferred embodiment the complexing agent is di-n-butyl ether.