Hanwha Chemical Corporation

Hanwha Solutions Corporation

Wan Jae Myeong

Bong Sik Jeon

Eung Gyu Kim

Ju Young Park

Eun Byul Kwon

Bong-Sik Jeon

Eui Geun Jung

Woo Jin Park

Jeong Kwon Kim

Sun Woo Yook

Taeghwan Hyeon

Won Yong Kim

Hyo Suk Kim

Ki Taeg Jung

Daishun Ling

Byung Hyo Kim

Taeg Hwan Hyeon

Kyoo Seung Han

Soo Yeong Han

Kyu Ho Song

No Hyun Lee

Young Jin Cho

Joung Woo Han

Jeong Hwan Chun

Provided are a hydrogenation reaction catalyst and a preparation method therefor, and more particularly, to a hydrogenation reaction catalyst including sulfur as a promoter, thereby selectively hydrogenating an olefin by changing a relative hydrogenation rate of the olefin and an aromatic group during a hydrogenation reaction of an unsaturated hydrocarbon compound containing an aromatic group, and a preparation method therefor.

Hydrogenation reaction catalyst and preparation method therefor

The present invention relates to a carbon-based precious metal-transition metal composite catalyst and a preparation method therefor, and more particularly, to a catalyst synthesis method in which, when preparing a high-content precious metal-transition metal composite catalyst, a catalyst having uniform particles and composition can be prepared, and cyclohexane dimethanol (CHDM) is efficiently produced by the hydrogenation reaction of cyclohexane dicarboxylic acid (CHDA) in an aqueous solution. Provided is a method for preparing a carbon-based precious metal-transition metal composite catalyst, wherein, in the carbon-based precious metal-transition metal composite catalyst, the precious metal is included in an amount of 10-20 parts by weight, and the transition metal is included in an amount of 10-20 parts by weight based on 100 parts by weight of the composite catalyst, and thus a total amount of the precious metal-transition metal is 20-40 parts by weight based on 100 parts by weight of the composite catalyst.

Carbon-based, precious metal-transition metal composite catalyst and preparation method therefor

The present invention relates to a catalyst for hydrogenation of an aromatic compound, which is capable of greatly reducing the inactivation of a catalyst by using a support including a magnesium-based spinel structure, and a preparation method therefor.

Catalyst for hydrogenation of aromatic compound and preparation method therefor

Provided are a noble metal-transition metal complex catalyst supported on a carbon-coated silica-alumina support and a preparation method therefor, the catalyst being capable of obtaining a fast reaction rate and catalyst stability, as compared to a conventional catalyst, when cyclohexane dimethanol (CHDM) production is carried out by a cyclohexane dicarboxylic acid (CHDA) hydrogenation reaction in an aqueous solution by using a carbon-coated supported catalyst.

Noble metal-transition metal complex catalyst supported on carbon-coated silica-alumina support, and preparation method therefor

The present invention relates to a catalyst for a hydrocarbon resin hydrogenation reaction and a preparation method for the same, wherein the catalyst is a nickel powder catalyst including nickel (Ni), copper (Cu), and sulfur (S), and more particularly, a nickel-based catalyst for a hydrogenation reaction, which is added to a hydrogenation reaction in order to improve the color of the hydrocarbon resin. According to an embodiment of the present invention, provided is a catalyst for a hydrogenation reaction, includes 40-80 parts by weight of nickel, 0.01-5 parts by weight of copper, 1-10 parts by weight of sulfur, and 10-60 parts by weight of a silica support based on 100 parts by weight of the entire dried catalyst including a support. Therefore, the catalyst can improve the quality of hydrocarbon resin. Furthermore, the catalyst can provide colorless, odorless, and transparent water-white hydrocarbon resin with improved thermal stability by removing unsaturated bonds in the hydrocarbon resin.

Catalyst for hydrogenation reaction and preparation method for same

Provided are a carbon-based noble metal-transition metal composite catalyst enabling high selective conversion of a carboxylic acid functional group into an alcohol functional group by pre-treating a carbon carrier including a predetermined ratio or more of mesopores, and a production method therefor.

Carbon-based noble metal-transition metal catalyst enabling high selective conversion and production method therefor

The present disclosure relates to a method for measuring aromatic contents in a hydrocarbon solution. More specifically, it relates to a measurement method capable of quickly and accurately checking aromatic contents in a compound, particularly in a hydrocarbon, in a solution state without a high-temperature drying process.

Method for measuring aromatic contents in hydrocarbon solution

Provided are a preparation method of iron oxide-based paramagnetic or pseudo-paramagnetic nanoparticles, iron oxide-based nanoparticles prepared by the same, and a T1 contrast agent including the same. More particularly, the disclosure describes a method for preparation of iron oxide nanoparticles having a extremely small and uniform size of 4 nm or less based on thermal decomposition of iron oleate complex, iron oxide-based paramagnetic or pseudo-paramagnetic nanoparticles prepared by the same, and a T1 contrast agent including iron oxide-based paramagnetic or pseudo-paramagnetic nanoparticles.

Preparation of extremely small and uniform sized, iron oxide-based paramagnetic or pseudo-paramagnetic nanoparticles and MRI T1 contrast agents using the same

The present invention relates to a method for preparing uniform metal oxide nanoparticles. According to the preparation method of the present invention, it is possible to maintain the temperature and pressure inside the reactor in a stable and constant manner by removing water generated in the reaction step for forming metal oxide nanoparticles. Thus, the uniformity of nanoparticles formed is increased, and the reproducibility between batches can be increased even in a repeated process and and a large-scale reaction. Therefore, the preparation method of the present invention can be used to synthesize uniform nanoparticles reproducibly in large quantities.

Method for preparing uniform metal oxide nanoparticles with high reproducibility

Provided are iron oxide nanocapsules for an MRI contrast agent having high contrast, in which a plurality of iron oxide nanoparticles having a hydrophobic ligand attached thereto are encapsulated in an encapsulation material including a biodegradable polymer and a surfactant, and which satisfy Relations 1, 2, 3, 4 and 5 below. Also a method of manufacturing the iron oxide nanocapsules is provided.5&#x2266;100*(IO)/(IO)&#x2003;&#x2003;[Relation 1]2.5&#x2266;100*(Cap)/(Cap)&#x2003;&#x2003;[Relation 2]0.5 wt %&#x2266;(IO)&#x2266;50 wt %&#x2003;&#x2003;[Relation 3]1 nm&#x2266;(IO)&#x2266;25 nm&#x2003;&#x2003;[Relation 4]50 nm&#x2266;(Cap)&#x2266;200 nm&#x2003;&#x2003;[Relation 5]

Iron oxide nanocapsules, method of manufacturing the same, and MRI contrast agent using the same

Disclosed are a composition including hydrophilic nanoparticles that have a monosaccharide-phosphate or a derivative thereof adhered to the surface thereof, a colloidal solution of the composition dispersed in water, and a magnetic resonance imaging contrast agent including the colloidal solution. According to the present invention, nanoparticles having biocompatibility and excellent water-dispersibility can be prepared by modifying the surface of inorganic nanoparticles. The prepared nanoparticles may be effectively used in a variety of applications including, for example, in vivo imaging applications such as an MRI contrast agent, nano-electronic convergence technologies such as a quantum dot light emitting device, biomedical applications such as hyperthermia, or the like. Moreover, compared to existing nanoparticles dispersed by a dispersion stabilizer known in the art, excellent dispersion stability and a relatively small hydrodynamic diameter may be attained.

Hydrophilic nanoparticles surface-modified with monosaccharide phosphate or monosaccharide phosphate derivatives, its colloidal solution and use thereof

Provided is an iron oxide nanocapsule which has extremely excellent water dispersibility, which is very stable in the body and which has very excellent MRI contrast ability, a method of manufacturing the same, and an MRI contrast agent using the same. The method of manufacturing the iron oxide nanocapsule includes the steps of: thermally decomposing an iron complex to prepare hydrophobic ligand-bonded iron oxide nanoparticles; and encapsulating the hydrophobic ligand-bonded iron oxide nanoparticles by a carboxymethyldextrandodecylamine conjugate encapsulation material or a dextran-linoleic acid conjugate encapsulation material to form an iron oxide nanocapsule.

Iron oxide nanocapsule, method of manufacturing the same, and MRI contrast agent using the same

Provided are a contrast agent for contrast imaging lymph node, which includes iron oxide nanoparticles dispersed and stabilized in an aqueous medium by a mussel adhesive protein-mimetic copolymer, a method for contrast enhanced lymphography using the foregoing contrast agent, and a method for diagnosis of lymph node cancers using the foregoing contrast agent. Using such a mussel adhesive protein-mimetic copolymer, the surface of iron oxide is modified and dispersed well in water to prepare a colloidal solution, which in turn forms the contrast agent containing the colloidal solution. The inventive contrast agent does not have toxicity and is easily taken up to the lymph node to exhibit excellent contrast imaging effects. The contrast agent of the present invention is useful for diagnosis of metastatic cancers.

MRI contrast agent for lymphography based on iron oxide nanoparticles and method for imaging lymph node using the same

The invention provides an anion-deficient non-stoichiometric lithium iron phosphate as an electrode-active material, which is represented by the formula LiFe(PO), wherein 0&#x3c;x&#x2266;0.15 and 0&#x3c;y&#x2266;0.05. The invention provides a method for preparing said LiFe(PO), which comprises preparing a precursor of lithium iron phosphate; mixing said precursor with water under reaction conditions of 200&#x2dc;700&#xb0; C. and 180&#x2dc;550 bar to produce lithium iron phosphate; and calcining, or granulating and calcining the resultant compound. The invention also provides electrochemical devices employing said LiFe(PO)as an electrode-active material.

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Daejeon, South Korea

Wan Jae Myeong