Korea Institute of Science and Technology

Kolon Industries, Inc.

Byoung Sung Ahn

Dong Ju Moon

Hyun Joo Lee

Sang Deuk Lee

Kun You Park

Hong Gon Kim

Chang Soo Kim

Moon Jo Chung

Hoon Sik Kim

Byung Gwon Lee

Dong Jin Suh

Gyeong Taek Gong

Young Soo Kwon

Jong Woo Ryu

Ji Sik Choi

Dong Min Kang

Sang Woo Kim

Hyun Jin Kim

Jeong-Myeong Ha

Jae Sun Jung

Eun Hyeok Yang

Jungho Jae

Jin-Hyung Kim

Jin Hyung Kim

Kyung Min Lee

Jae Suk Lee

Hye Jin Lee

Jae Wook Choi

Jong Sung Lim

Hyejeong Lee

Jong-sung Lim

Kwang Deog Jung

Jeong Myeong Ha

Byung-Gwon Lee

Chang-Nyeon Kim

Oh S Joo

Jin Hee Lee

Jung Hwan Song

Young Soon Um

Bang Hee Kim

Minserk Cheong

Ga Ram Choi

Haryo Pandu Winoto

Jung Min Lee

Kye Sang Yoo

Jong Tae Jung

Jung Jo Jung

Yong Joon Lee

Kyesang Yoo

Hilman Hutama

Disclosed are a heteropolyacid catalyst for producing gamma-valerolactone, which is supported on M-Beta zeolite (M=Sn, Ti, Zr or Hf), and a method for preparing the same and a method for manufacturing gamma-valerolactone using the catalyst. The catalyst has an effect of producing gamma-valerolactone from biomass-derived furfural at a high yield through a one-pot process.

Catalyst for producing gamma-valerolactone, method for preparing the same and method for manufacturing gamma-valerolactone using the same

The apparatus includes: a pretreatment tank where biomass and a first acid solution are stirred to extract sugar components from the biomass; a hydrolysis tank where water is added to the pretreated mixture transferred from the pretreatment tank such that the concentration of the acid is reduced and the sugar components are hydrolyzed to produce an acid hydrolyzate; a first sugar-acid separation tank where the acid hydrolyzate is separated into a second acid solution and a first hydrolyzate; a second sugar-acid separation tank where the first hydrolyzate is separated into a third acid solution and a second hydrolyzate; a fermentation tank where the second hydrolyzate is fermented to produce bioenergy; and an acid solution concentration tank where a mixture of the second acid solution transferred from the first sugar-acid separation tank and the third acid solution transferred from the second sugar-acid separation tank is concentrated to a higher level for reuse.

Apparatus and method for bioenergy production using regenerated acid solution

There are provided an ionic liquid having ether group(s) in which a copper(I) compound is included, a method for preparing the same, and a method for removing traces amounts of acetylene-based hydrocarbon compounds included in olefin by absorption or extraction using the same. When the disclosed solution is used, oxidation of Cu(I) to Cu(II) is prevented since CuX is stabilized by the ionic liquid. Thus, selective removal efficiency of acetylenic compounds is improved greatly while the removal performance is retained for a long period of time. Further, since the solution according to the present disclosure is applicable as an extractant as well as an absorbent, the associated operation is simple and apparatus cost can be decreased.

Ionic liquids, the method for preparing the same and method for removing acetylenes from olefin mixtures using the ionic liquids

A method for preparing glycidol using glycerol includes mixing glycerol with urea in the presence of at least one zinc-based catalyst selected from the group consisting of Zn(NO), ZnCl, ZnO and Zn(OAc)under a pressure of 0.5-10 kPa at a temperature of 100-170&#xb0; C. to obtain glycerol carbonate; filtering the glycerol carbonate mixed with the zinc-based catalyst through an adsorbent including a polymer resin coordinated with amine groups to separate the zinc-based catalyst and glycerol carbonate from each other; and carrying out reaction of the glycerol carbonate separated from the zinc-based catalyst in the presence of an anion alkali metal salt catalyst that is Na, K, Rb, Cs or a mixture thereof containing at least one anion selected from the group consisting of Cl, Br, I, NO, NOand acetate under a pressure of 0.13-6.67 kPa at a temperature of 140-250&#xb0; C. to obtain glycidol.

Method for preparing glycidol using glycerol and glycidol obtained thereby

The present invention relates to a method for preparing a nickel-based catalyst for steam carbon dioxide reforming (SCR) of natural gas using steam and carbon dioxide, more particularly to a method for preparing a nickel-based catalyst represented by Ni/&#x3b7;-AlO, which is prepared by supporting nickel on a spherical &#x3b7;-alumina support having many acid sites at high density by repeating impregnation and drying tens of times. The catalyst prepared according to the present invention exhibits superior catalytic activity when used in steam carbon dioxide reforming reaction (SCR) even under harsh conditions of high temperature and high pressure and hardly exhibits carbon deposition due to superior durability.

Process for preparing nickel based catalysts for SCR of natural gas

Provided is a palladium on carbon (Pd/C) catalyst obtained by using an ionic liquid, a method for preparing the same, and a method for hydrogenation of hydrofluorocarbon using the same. More particularly, palladium particles are supported on carbon particles by using an ionic liquid, and the resultant Pd/C catalyst is used for hydrogenation of hydrofluorocarbon. The catalyst includes palladium particles having a smaller particle size and a more uniform shape as compared to the existing Pd/C catalysts, and thus shows high catalytic activity.

Carbon-based palladium catalyst obtained by using ionic liquid, method for preparing the same and hydrogenation of hydrofluorocarbon using the same

Disclosed is a method for preparing a metal fluoride catalyst as a dehydrofluorination catalyst having high activity under a mild condition using a trifluoroacetic acid solution with no use of HF gas having fluidity and corrosive property. Disclosed also is a dehydrofluorination method for preparing HFO-1225ye from HFP-236ea by using the catalyst with high efficiency.

Method for preparing metal fluoride catalysts and dehydrofluorination method using the same

Disclosed is a method for producing glycidol by successive catalytic reactions. The method includes a series of reactions for the preparation of glycerol carbonate from glycerol and the decarboxylation of the glycerol carbonate. Specifically, the method includes i) reacting glycerol with a dialkyl carbonate to prepare glycerol carbonate, and ii) subjecting the glycerol carbonate to decarboxylation wherein a base is added as a catalyst in step i) and is allowed to react with an acid to form a metal salt after step i), and the salt is used as a catalyst in step ii). According to the method, inexpensive and easy-to-purchase acid and base catalysts can be used to produce glycidol from glycerol, a by-product of biodiesel production, as a starting material in high yield with high selectivity in a convenient, simple, and environmentally friendly way. In addition, the method eliminates the need to separate the base catalyst.

Method for producing glycidol by successive catalytic reactions

Disclosed is a method for producing glycidol by decarboxylation of glycerol carbonate. In the method, an ionic liquid catalyst is added for the reaction. According to the method glycidol can be produced in high yield and selectivity. The method enables the production of glycidol in an easy, simple and environmentally friendly way.

Method for producing glycidol

The present invention relates to an Fe-modified perovskite-type catalyst, a method for preparing same and a method for preparing a synthesis gas by a combined reforming reaction using same. More particularly, it relates to a catalyst for a combined natural gas/steam/carbon dioxide reforming reaction having a perovskite structure with La and Sr introduced at the A site and Ni and Fe introduced at the B site with specific molar ratios and a method for producing a synthesis gas for Fischer-Tropsch synthesis or methanol synthesis using the catalyst by the combined reforming reaction. The catalyst of the present invention exhibits higher carbon dioxide conversion rate, significantly reduced catalyst deactivation caused by carbon deposition and improved long-term catalyst stability and activity, as compared to the existing catalyst for reforming reaction prepared by the impregnation method.

[object Object]

The present invention relates to a method for one-pot synthesis of ionic liquid with fluoroalkyl group, more particularly to a method for one-pot synthesis of ionic liquid with fluoroalkyl group represented by the following Chemical Formula 1 by adding and reacting a nitrogen-containing compound, a Br&#xf8;nsted acid of the formula YH and a fluoroolefin compound of the formula CFR&#x2550;CRRin a single reactor:  wherein represents a nitrogen-containing compound; Yrepresents an anion of the Br&#xf8;nsted acid; and R, Rand R, which may be same or different, represent hydrogen, fluorine, C-Calkyl or C-Cfluoroalkyl having from 1 to 23 fluorine atoms.

One-pot synthesis of fluorinated ionic liquids

The present invention relates to a method of purifying olefin, the method comprising removing a small amount of acetylenic compounds contained in olefin by using pyrrolidinium-based or piperidinium-based ionic liquid mixtures comprising copper (I) halide. According to the method of the present invention, copper (I) halide is stabilized by pyrrolidinium-based or piperidinium-based ionic liquids, suppressing the oxidation of Cu(I) into Cu(II), whereby the capacity of removing acetylenic compounds can be maintained for a long time and the selective removal rate of acetylenic compounds to olefin can be significantly improved. In addition, since the ionic liquid mixtures comprising copper (I) halide used in the method of the present invention can be applied to both absorption and extraction processes, it can effectively remove acetylenic compounds from olefin in a more simple and economical way compared to the existing adsorption and membrane separation processes.

Method of purifying olefins using pyrrolidinium-based or piperidinium-based ionic liquids comprising copper (I) halide

The present invention relates to a process for removing acetylenes from olefins by using an ionic liquid-based solution, and particularly to a process for removing a small amount of acetylenes contained in olefins by using an ionic liquid-based solution where copper halide (CuX, X=halogen atom) is dissolved. In an ionic liquid-based solution used in the present invention, copper halide (CuX) is stabilized by ionic liquid, thus preventing monovalent copper ion (Cu) from being oxidized into divalent copper ion (Cu), maintaining the superior activity of monovalent copper ion (Cu) in removing acetylene for a long period of time, and remarkably increasing the selective removal of acetylene-based compounds. Moreover, an ionic liquid-based solution used in the present invention may serve as an extracting solution as well as an absorbent, thereby facilitating the operation and reducing equipment cost in comparison to the conventional extracting agent used in a slurry phase.

Method for the removal of acetylenes from olefins using ionic liquid-based solution

The present invention relates to a method for separation and recycling of pure sulfur dioxide from a gaseous mixture in the IS cycle. More specifically, the present invention relates to a method for separation and recycling of pure sulfur dioxide from a gaseous mixture in the IS cycle using an ionic liquid under a specific condition. When compared with the conventional amine-based absorbent, the use of the ionic liquid enables continuous absorption and stripping of SOeven at high temperature, and enables a reversible absorption of SOwithout loss, decomposition or degradation of a solvent due to good chemical stability, thereby enabling separation and recycling of pure SOfrom a gaseous mixture in the IS cycle.

Method for separation and recycle of pure sulfur dioxide from a gaseous mixture in is cycle with ionic liquids

Growing community of inventors

Seoul, South Korea

Byoung Sung Ahn