Lg Chem, Ltd

Korea Research Institute of Standards and Science

Electronics and Telecommunications Research Institute

Korea Institute of Science and Technology

Yong Ho Lee

Ki Soo Lee

Seok Pil Sa

Eun Ji Shin

Jin Young Park

Seul Ki Im

Heon Yong Kwon

Dae Sik Hong

Kyung Jin Cho

Eun Kyoung Song

Min Seok Cho

Sung Min Lee

Yoon Ki Hong

Yi Young Choi

Se Young Kim

Ki Woong Kim

Chang Woan Han

Jin Mok Kim

Bog Ki Hong

Sung Ho Park

Hyuck Ju Kwon

Kyoung-Chan Lim

Hyeon-Gook Kim

Hyuk Chan Kwon

Dae Hwan Kim

Deock Gil Oh

Ki-Soo Lee

Min-Seok Cho

Hyukchan Kwon

Heon-Yong Kwon

Eun Young Shin

Dae-Sik Hong

Yu Taek Sung

Seung Mi Lee

Kwon Kyu Yu

Dong Hoon Jeong

Manseong Jeon

Hyung Sun Kim

Sung Jin Hong

Yong Ki Park

Byung Won Cho

Sun Mi Kim

Hyun Jee Kwon

Soon Ho Sun

Hee Sook Shin

Seong Min Baek

Pan Soo Kim

Youn Hee Gil

Seong-Joo Lee

Young Suk You

Joong Soo Kim

Seon-Kyoung Kim

Wook Ho Son

Si Hyoung Oh

Joon Hee Cho

Jeung Chul Park

Jong-Sang Park

Beom Ryeol Lee

Man-Seong Jeon

Cho Rong Yu

Se Hui Sohn

Ki Heon Song

Won Chang Choi

In Seon Kim

Ju Hyeon Ahn

Eunkyoung Song

Seon Kyoung Kim

A system and method for providing a virtual reality service is provided. For the system and method capable of realizing an interaction image of a user's full body, the system includes a head-mounted device mounted on the head of the user, a first RGB-D sensor configured to be installed on the head-mounted device, generate first image data of the user, and be arranged to face the user, a second RGB-D sensor configured to be installed on the head-mounted device, generate second image data of the user, and be arranged to face the user, and a calculation device configured to obtain a skeleton image of the user on the basis of the first image data and the second image data, obtain posture information of the user on the basis of the skeleton image of the user, and generate an interaction image on the basis of the posture information of the user.

System and method for providing virtual reality service

The present disclosure relates to a method of and an apparatus for generating a space for sharing augmented reality content among multiple participants. With the method and the apparatus, an object for configuring a virtual space, which is proposed in an actual space, can also be proposed, in a spatial matching manner on a per-user basis, inside a common sharing space in augmented reality content by utilizing the technology of generating a space for sharing augmented reality content among multiple participants.

Method of and apparatus for generating space for sharing augmented reality content among multiple participants

The present invention relates to a ligand compound, a catalyst system for olefin oligomerization and a method for oligomerizing an olefin using same. The catalyst system for olefin oligomerization according to the present invention exhibits high selectivity to 1-hexene or 1-octene while having excellent catalytic activity, thus enabling more efficient preparation of alpha-olefins.

Ligand compound, organic chromium compound, catalyst system for olefin oligomerizatin, and method for oligomerizing olefin using same

The present invention relates to a method for preparing an oligomerization catalyst system and the method comprises preparing a catalyst composition by mixing a PNP-based ligand compound and a transition metal compound, and mixing and activating a co-catalyst and the catalyst composition at a temperature from &#x2212;40 to 80&#xb0; C. The oligomerization catalyst system prepared by the method may maintain the activity thereof during an oligomerization reaction at a high temperature, and the reaction temperature of oligomerization may be easily controlled. Various merits in processing may be obtained.

Method for preparing oligomerization catalyst system and oligomerization catalyst system prepared thereby

The present invention provides a method for preparing a polyolefin having a broad molecular weight distribution. More specifically, the present invention provides a method for preparing a polyolefin having a broad molecular weight distribution and an ultra-high molecular weight in which an organometallic complex containing a specific Ti&#x2014;Al complex structure is used as a molecular weight controller (i.e., molecular weight enhance) in the polymerization of an olefin monomer, thereby enabling both solution polymerization and slurry polymerization, particularly enabling the molecular weight distribution to be more readily and effectively controlled.

Method for preparing polyolefin

Ligand compound, organic chromium compound, catalyst system for olefin oligomerization, and method for oligomerizing olefin using same

The present invention relates to a ligand compound, a catalyst system for oligomerization of olefins including the ligand compound and the organic chromium compound, and a method for oligomerizing olefins using the same. The catalyst system for olefin oligomerization according to the present invention invention exhibits high selectivity to 1-hexene or 1-octene while having excellent catalytic activity, thereby enabling more efficient production of alpha-olefins.

Ligand compound, organic chromium compound, catalyst system for oligomerization of olefins, and method for oligomerizing olefins using the same

A method for olefin oligomerization comprising i) injecting an olefin monomer and a solvent into a continuous stirred tank reactor; ii) injecting an oligomerization catalyst system comprising a ligand compound, a transition metal compound, and a co-catalyst into the continuous stirred tank reactor; and iii) performing a multimerization reaction of the olefin monomer, wherein a ratio of the flowing rates of the olefin monomer and the solvent is from 1:1 to 2:1.

Method for olefin oligomerization

Provided are a catalyst composition and a method of oligomerizing olefins using the same. When the catalyst composition according to the present invention is used, oligomerization and copolymerization of olefin monomers may be performed in a single reactor at the same time with high efficiency without a separate process of preparing alpha-olefin. Therefore, costs for preparing or purchasing comonomers which are expensive raw materials may be reduced, thereby reducing the production cost of a final product. Contents of SCB (short chain branch) and LCB (long chain branch) in the polyolefin may be increased without separate feeding of comonomers, thereby producing high-quality linear low-density polyethylene.

Catalyst composition and method of preparing polyolefin using the same

The present invention relates to a ligand compound, a catalyst system for oligomerization of olefins, and a method for oligomerization of olefins using the catalyst system. The catalyst system for oligomerization of olefins according to the present invention not only has excellent catalytic activity, but also exhibits high selectivity to 1-hexene or 1-octene, thus enabling more efficient preparation of alpha-olefin.

Ligand compound, organic chromium compound, catalyst system for oligomerization of olefins, and method for oligomerization of olefins using the catalyst system

A method for oligomerizing an olefin comprising performing a multimerization reaction of an olefin in the presence of an oligomerization catalyst system comprising a ligand compound, a transition metal compound and a co-catalyst, and controlling a reaction temperature during the multimerization reaction in a range of 30 to 150&#xb0; C., such that a product of the multimerization reaction comprising 1-hexene and 1-octene has a predetermined value of a weight ratio of 1-hexene and 1-octene selected from a range of 1:0.5 to 1:7.

Method for oligomerizing an olefin

The present invention relates to a catalyst system for olefin oligomerization and a method for olefin oligomerization, and more specifically, a catalyst system for olefin oligomerization and a method for olefin oligomerization that have more improved supporting efficiency due to a ligand compound capable of functioning as a tether to a support, and thus, exhibit high activity in the olefin oligomerization even with smaller amounts of catalyst composition and cocatalyst, thus enabling more efficient preparation of alpha-olefins.

Catalyst system for olefin oligomerization and method for olefin oligomerization using the same

The method for oligomerizing olefin according to the present disclosure is a method for oligomerizing olefin using an oligomerization catalyst system and includes deteriorating the activity of the oligomerization catalyst system by injecting a deactivator in a latter part of a multimerization reaction of olefin. The deactivator may include an additive for polymer containing at least one functional group selected from the group consisting of a hydroxyl group, an amine group and an amide group. According to the oligomerizing method, the isomer of 1-hexene and/or 1-octene and alpha-olefins with Cto Cmay be decreased via the restraint of the additional side reaction of a product. Since the deactivator is an additive for enhancing the physical properties of a polymer, a separating process thereof is not required, thereby improving economic feasibility and productivity.

Deactivator and method for decreasing by-products in olefin oligomerization using the same

The present invention relates to a ligand compound, catalyst system for olefin oligomerization, and a method for oligomerizing olefins using the same. The catalyst system for olefin oligomerization according to the present invention exhibit selectivity to 1-hexene or 1-octene while having excellent catalytic activity, thus enabling more efficient preparation of alpha-olefins.

Ligand compound, organic chromium compound, catalyst system for olefin oligomerization, and method for oligomerizing olefins using the same thereof

The present disclosure relates to a ligand compound, a catalyst system for oligomerization, and a method for olefin oligomerization using the same. The catalyst system for oligomerization using the ligand compound according to the present disclosure has excellent catalytic activity, exhibits high selectivity to 1-hexene and 1-octene, and greatly reduces the production of the by-products, thereby enabling efficient preparation of alpha-olefin.

Ligand compound, catalyst system for oligomerization, and method for olefin oligomerization using the same

Growing community of inventors

Daejeon, South Korea

Yong Ho Lee