Sk Innovation Co., Ltd.

Sk Energy Co., Ltd.

Sk Geo Centric Co., Ltd.

Samsung Electro-Mechanics Co., Ltd.

Korea Advanced Institute of Science and Technology

Sk Biopharmaceuticals Co., Ltd.

Sk Global Chemical Co., Ltd.

Sk Holdings Co., Ltd.

Sang Il Lee

Ji Hoon Lee

Seung Hoon Oh

Sun Woong Choi

Gyung Rok Kim

Do Woan Kim

Young Eun Cheon

Seung Woo Lee

Yong Seung Kim

Sung Real Son

Sang Hun Oh

Hong Chan Kim

Jong Hyung Lee

Yong Hoon Lee

Jong Ok Ha

Yeon Ho Kim

In Hyoup Song

Jin Woong Kim

Hee Jung Jeon

Eun Kyoung Kim

Sung Won Kim

Sung Hoon Oh

Dae Hyun Choo

Hyuck Lee

Jae Wook Ryu

Min Hyun Kim

Tae Yun Kim

Seong Jin Kim

Yoon Kyung Lee

Young Moo Park

Sang Hyun Cho

Jong Ho Lim

Do Kyoung Kim

Cheol Joong Kim

Joong Min Park

Jae Suk Koh

Eui Rim Jeong

Byong Sung Kwak

Kyung Jong Oh

Young Bo Choi

Il Yong Jeong

Soon Chan Park

Dae Sung Song

Sin Young Kang

Jae Hyun Koh

Sang Heup Moon

Myoung Han Noh

Soon Il Hong

Kyeong Hak Seong

Hee Du Lee

Woo Kyung Kim

Woo Young Kim

Sang Jun Ju

Kyung Soo Jun

Han Seung Pan

Ki Ho Koh

Young Wook Sirl

Kwang Pyo Lee

Hyun Chul Choi

Hyuck Jae Lee

A Ra Cho

Hee Jun Hwang

Disclosed is a method for providing improved hydrogenation activity by pretreating a catalyst in a three-step manner before selective hydrogenation of unsaturated hydrocarbons in an aromatic fraction in the presence of an oxide-type bimetallic (particularly nickel-molybdenum) supported catalyst.

Method of improving selective hydrogenation of unsaturated hydrocarbon in aromatic fraction through catalyst pretreatment

Disclosed are a process and system that are capable of performing selective hydrogenation on aromatic fractions by configuring a catalyst bed through staged loading of a plurality of hydrogenation catalysts with different catalytic properties, or configuring a catalyst system in which a plurality of hydrogenation catalysts are arranged using a plurality of reactors in such a way as to be equivalent with the staged loading, and as a result, are capable of suppressing aromatic loss while improving the selective removal of unsaturated hydrocarbons in the aromatic fraction and durability compared to the case of using a single catalyst.

Process for reducing unsaturated hydrocarbons in aromatic fraction through selective hydrogenation

Disclosed are a catalyst and a preparation method therefor, the catalyst being able to maintain a high production yield of C8 aromatic hydrocarbons in the process of converting a feedstock containing alkyl aromatics to C8 aromatic hydrocarbons such as mixed xylene through disproportionation/transalkylation/dealkylation while reducing a content of ethylbenzene in the products.

Catalyst for producing C8 aromatic hydrocarbon having reduced ethylbenzene content and preparation method therefor

Disclosed are a bifunctional catalyst and a preparation method therefor, the bifunctional catalyst being suitable to produce high-value aromatic hydrocarbons by subjecting alkylaromatic hydrocarbons to a disproportionation/transalkylation/dealkylation reaction while suppressing aromatic loss or subjecting C8 aromatic hydrocarbons to an isomerization reaction while suppressing xylene loss.

Catalyst for converting alkylaromatic hydrocarbon and preparation method thereof

The present invention relates to a method of producing anhydrosugar alcohol by dehydrating sugar alcohol at high pressure in the presence of a catalyst which is less acidic than a conventional sulfuric acid catalyst and which can suppress side reactions at high temperature. According to the present invention, anhydrosugar alcohol can be produced in a yield similar to that in a vacuum reaction.

Method for producing anhydrosugar alcohol by high-pressure reaction

The present disclosure provides a process for effectively separating and removing by-products (light gas, C5-C6 hydrocarbon oil fraction, polyethylbenzene) contained in a substantial amount in addition to ethylbenzene as a target compound in an alkylation reaction product of a fluidized catalytic cracking off-gas to prepare ethylbenzene having high purity, and process economical efficiency may be secured by utilizing the polyethylbenzene as an absorbent or gasoline fraction, without requiring a transalkylation reaction for further producing ethylbenzene from polyethylbenzene.

Method for recovering ethylbenzene from alkylation product of fluidized catalytic cracking off-gas and benzene

Disclosed herein is a catalyst for producing biodiesel, including a carrier having water resistance and an active component supported on the carrier and used in a hydrotreating reaction or a decarboxylation reaction. Since the catalyst for producing biodiesel includes a carrier having strong water resistance, the deactivation of the catalyst due to the water produced through a process of producing HBD can be prevented, thus remarkably improving the long term stability of a catalyst.

Catalyst for producing hydrogenated biodiesel and method of producing the same

The present invention relates to a method for producing anhydrosugar alcohol, and more particularly to a method of producing anhydrosugar alcohol using a solvent including at least two components that form an azeotrope with water at atmospheric pressure and that have significantly different boiling points. The method for producing anhydrosugar alcohol according to the present invention can increase the yield of anhydrosugar alcohol by efficiently controlling the reaction temperature by use of a solvent including at least two components that form an azeotrope with water at atmospheric pressure and that have significantly different boiling points.

Method for producing anhydrous sugar alcohol using azeotropic distillation

A method for producing anhydrosugar alcohol according to the present invention can increase the yield of anhydrosugar alcohol even in the absence of a catalyst or in the presence of a small amount of a transition metal salt catalyst by controlling the temperature of a high-temperature reaction, which converts sugar alcohol to anhydrosugar alcohol, in two steps, that is, a first low-temperature reaction step and a second high-temperature reaction step.

Method for preparing anhydrosugar alcohol using two-step hydrothermal reaction

A high-frequency signal predistortion device includes a high-frequency signal estimator, a predistortion estimator, and a predistorter. The high-frequency signal estimator is configured to determine non-linear distortion characteristics of high-frequency signals transmitted by antennas. The predistortion estimator is coupled to the high-frequency signal estimator. The predistortion estimator is configured to determine a predistortion coefficient based on the non-linear distortion characteristics. The predistorter is coupled to the predistortion estimator. The predistorter is configured to distort a base signal of the high-frequency signals based on the predistortion coefficient.

High-frequency signal predistortion device and nonlinear distortion correcting device for power amplifier

An apparatus includes a first predistorter configured to calculate a first predistortion parameter and configured to distort an input signal using the first predistortion parameter to output a first distortion signal, a second predistorter configured to calculate a second predistortion parameter and configured to distort the first distortion signal using the second predistortion parameter to output a second distortion signal, a power supply configured to receive the first distortion signal to generate a first envelope signal, and configured to limit a bandwidth of the first envelope signal to obtain a second envelope signal to supply a source voltage, and a power amplifier configured to receive the source voltage and to output an output signal obtained by amplifying the second distortion signal.

Envelope tracking power amplifying apparatus and method

This invention relates to a hydrocracking catalyst for preparing valuable light aromatic hydrocarbons from polycyclic aromatic hydrocarbons derived from oil, which includes (i) beta-zeolite, (ii) pseudo-boehmite, and (iii) one or more metals selected from among metals of Groups VIII and VIB, and which further includes a cocatalyst component, thereby producing a maximum amount of BTX (Benzene, Toluene, Xylene) from LCO (Light Cycle Oil).

Hydrocracking catalyst for preparing valuable light aromatic hydrocarbons from polycyclic aromatic hydrocarbons

Disclosed herein is a method of simultaneously removing sulfur and mercury from a hydrocarbon material, including: hydrotreating the hydrocarbon material containing sulfur and mercury in the presence of a catalyst including a metal supported with a carrier to convert sulfur into hydrogen sulfide, and adsorb mercury on a metal active site or a carrier of the catalyst in the form of mercury sulfide.

Method of simultaneously removing sulfur and mercury from hydrocarbon material using catalyst by means of hydrotreating reaction

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Daejeon, South Korea

Sang Il Lee