摘要:
This disclosure relates to olefin polymerization catalysts and compositions, their manufacture, and the production of polyolefins using specific catalyst compositions, including the use of chain-shuttling agents in the olefin polymerization process. Specifically, this disclosure provides for dual-headed and multi-headed chain shuttling agents (CSAs or MSAs) and for their use in preparing blocky copolymers. By controlling the ratio of dual-headed and multi-headed CSA sites to mono-headed CSA sites, a blocky copolymer can be provided having properties such as a narrow molecular weight distribution and/or improved melt properties.
摘要:
A method of purifying crude organometallic compounds using a plurality of distillation columns is provided. This method effectively removes both relatively more volatile impurities and relatively less volatile impurities as compared to the organometallic compound.
摘要:
Disclosed are effective and simple adsorbents and methods of using the adsorbents for removing metal impurities generated during storage, transportation and supply of organometallic compounds. The disclosed adsorbents and methods provide for the easy and effective removal of the metallic impurities or compounds generated from decomposition of the organometallic compound during its transportation, storage, and supply. Namely, the disclosed adsorbents and methods permit the stable supply of a high purity organometallic compound desired in the semiconductor and photovoltaic cell.
摘要:
A process for preparing a metal alkyl compound comprising reacting a metal halide solution with an alkylmetal solution in a microchannel device or purifying an organometallic metal in a microchannel device. The metal alkyl compounds prepared by the process may have reduced impurities rendering them suitable for electronic materials applications, such as chemical vapour deposition.
摘要:
A method of preparing an ultra-pure metal amidinate compound comprising using a microchannel device for synthesis in reacting a metal halide solution with a lithium amidinate solution to produce an ultra-pure alkylmetal compound for processes such as chemical vapor deposition.
摘要:
A process for producing trihydrocarbylaluminums in high yields from an aluminum/magnesium alloy and a halogenated hydrocarbon, characterized by using the alloy pulverized by means of a ball mill or vibrating mill and/or conducting the reaction by stirring with an abrasive medium or by using a homogenizer which rotates at a high speed in the course of the reaction.
摘要:
The invention concerns the use of stabilized metallo-organic adduct compounds for producing thin films and epitactic coatings by vapour deposition.