摘要:
Processes for the polymerization of olefins with extracted metal carboxylate salts are provided. The polymerization processes have increased productivity and/or increased resin bulk density.
摘要:
This disclosure is directed to processes for producing catalyst compositions having more consistent properties and improved flowability. The processes may involve combining, at a controlled temperature of 30° C. or higher, a metal carboxylate salt with an organic solvent having a dielectric constant at 25° C. of greater than or equal to 3.0 to produce an extracted metal carboxylate salt that is essentially free of carboxylic acids. The extracted metal carboxylate salt may then be combined with a catalyst.
摘要:
Provided are a novel metallocene compound, a metallocene-supported catalyst, and a method of preparing a polyolefin using the same. The metallocene-supported catalyst according to the present disclosure exhibits a high polymerization activity even when the metallocene compound is supported on a support, thereby showing an excellent activity and preparing a polyolefin having a high molecular weight.
摘要:
Processes for the polymerization of olefins with extracted metal carboxylate salts are provided. The polymerization processes have increased productivity and/or increased resin bulk density.
摘要:
CATALYST PARTICLES SUITABLE FOR PREPARING ALPHA-OLEFIN POLYMERS IN THE FORM OF 5 TO 15 MICRON PARTICLES ARE PREPARED BY REDUCING TIC14 WITH AN ALKYLALUMINUM DIHALIDE AT CONTROLLED LEVELS OF TITANIUM CONCENTRATION, ALUMINUM CONCENTRATION, AND AL/TI RATIO. THE REDUCTION IS CARRIED OUT AT ROOM TEMPERTURE UNDER QUIESCENT CONDITIONS.