Hanwha Total Petrochemical Co., Ltd.

Lg-ericsson Co., Ltd.

Young Mi Lee

Su Min Ko

Eun Il Kim

Joon Ryeo Park

Yong Hoon Lim

Byeong Ki Kim

Eun-Il Kim

Hyeong Cheol Park

The present invention relates to a propylene polymerizing solid catalyst for reducing the volatile organic compound (VOC) and a method of producing polypropylene using the propylene polymerizing solid catalyst, the propylene polymerizing solid catalyst including an organic electron donor formed of a combination of a first internal electron donor of titanium, magnesium, halogen and cyclic diester and a second internal electron donor of diether, and has improved hydrogen reactivity of a catalyst compared to a conventional method and has an effect that is capable of producing an eco-friendly polypropylene which has greatly lowered a content of the VOC by using the catalyst.

Propylene polymerizing solid catalyst for reducing VOC and method of producing polypropylene using same

The present invention relates to a solid catalyst for propylene polymerization and a method of producing a propylene polymer or copolymer using the solid catalyst for propylene polymerization, and provides a solid catalyst which prepares a dialkoxymagnesium carrier and is formed of a carrier produced through a reaction of the carrier with a metal halide, a titanium halide, an organic electron donor, etc., and a method of producing a propylene polymer or copolymer through copolymerization of propylene-alpha olefin using the solid catalyst, wherein the dialkoxymagnesium carrier has an uniform particle size range of 10 to 100 &#x3bc;m and a spherical particle shape by adjusting injection amounts, injection numbers, and reaction temperatures of metal magnesium, alcohol and a reaction initiator during a reaction process of metal magnesium and alcohol.

Solid catalyst for propylene polymerization and method of producing block copolymer using the same

The present disclosure relates to a solid catalyst for propylene polymerization and a process for manufacture of a propylene polymer or copolymer using the solid catalyst, and provides a solid catalyst including carriers produced via a reaction between dialkoxy magnesium and metal halide, titanium halide, an organic electron donor, etc. and a process of manufacture of a propylene-based block copolymer via copolymerization of propylene-&#x3b1;-olefin using the solid catalyst. Particularly, internal electron donors including an ester group and an alkoxy group are used as two kinds of organic electron donors used in the present disclosure, and, thus, a block copolymer having high activity and excellent stereoregularity and a high rubber content via copolymerization with &#x3b1;-olefin can be produced using a solid catalyst system suggested in the present disclosure.

Process of manufacture of catalyst and propylene polymer that use this or copolymer for propylene polymerization

Embodiments may relate to a method and system for performing a handover from a serving base station to a target base station. A signal for detecting a base station searching signal (BS-SS) may be transmitted from the base station to a user equipment. The target base station may receive a request for the signal for detecting the BS-SS and the signal for detecting the BS-SS may be transmitted from the serving base station to the target base station. The user equipment that had broadcasted the BS-SS to the plurality of base stations is identified, based on the receipt signal of the BS-SS. A handover may be performed from the serving base station to the target base station based on confirmation of the serving base station.

Growing community of inventors

Suwon-si, South Korea

Young Mi Lee