The present disclosure relates to a method for producing 1,4-cyclohexanedimethanol (CHDM) and, more specifically, provides a method for producing 1,4-cyclohexanedimethanol having a high proportion of trans isomers even without including an isomerization step, by adjusting the content of 1,4-cyclohexane dicarboxylic acid (CHDA) which is a reactant.

An object of the present invention is to provide a composition for forming an undercoat layer capable of forming an undercoat layer that does not easily peel off from the substrate, an undercoat layer formed by the composition, as well as an exhaust gas purification catalyst and an exhaust gas purification apparatus each including the undercoat layer, and, to achieve the object, the present invention provides a composition for forming an undercoat layer, the composition containing tin oxide microparticles and tin oxide nanoparticles, wherein a content of the tin oxide nanoparticles is 8% by mass or more and 30% by mass or less, with respect to a total content of the tin oxide microparticles and the tin oxide nanoparticles, an undercoat layer formed by the composition, as well as an exhaust gas purification catalyst and an exhaust gas purification apparatus each including the undercoat layer.

A preparation method for a highly chlorine- and water-resistant catalyst is provided. A mixture of at least one of SnO.sub.2, GeO.sub.2, and MoO.sub.2 with CeO.sub.2 is used as a catalyst support, face-centered cubic ruthenium oxide is used as an active component, and the catalyst with excellent chlorine- and water-resistance is prepared through selective adsorption regulation, which can realize safe and efficient purification of chlorine-containing organic waste gas at temperatures below 250° C.

An alkylaromatic conversion catalyst system having (a) a first catalyst composition having (i) a carrier which includes a binder composition prepared from a mixture having one or more oligomerized alkoxy silicates and one or more hydrolyzing agents; and a ZSM-5 zeolite; (ii) one or more metals chosen from the group consisting of Groups 6, 9, 10 and 11; and optionally, (iii) a Group 14 metal; and (b) a second catalyst composition having (i) a carrier which includes a refractory oxide binder and a zeolite selected from one or more of ZSM-5, ferrierite, ZSM-11, ZSM-12 and EU-1; (ii) one or more metals chosen from the group consisting of Groups 6, 9, 10 and 11; and optionally, (iii) a Group 14 metal.

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.

An alumina grain has a single-crystal structure and has an approximate regular octahedral stereoscopic morphology. Eight sides of the alumina grain belong to the {111} family of crystal planes of γ-state alumina, and the grain size is 5-100 μm. The alumina grain is unique in crystal plane exposure and distribution, simple and feasible in preparation, and low in cost, and has higher operability, and thus has good application prospect in the field of catalysis and adsorption.

A dehydrogenation catalyst for producing propylene by a dehydrogenation reaction of propane, the dehydrogenation catalyst including a platinum element and an element M1 and may contain an element M2 as active components, wherein the element M1 is one or more elements selected from the group consisting of a gallium element, a cobalt element, a copper element, a germanium element, a tin element and an iron element, the element M2 is one or more elements selected from the group consisting of a lead element and a calcium element, and the platinum element and the element M1 form an alloy.

A process for preparing an aromatic isocyanate by direct carbonylation of a nitro aromatic compound by reacting the nitro aromatic compound with carbon monoxide in the presence of a catalyst, characterized in that the catalyst contains a multi metallic material comprising one or more binary intermetallic phases of the general formula A.sub.xB.sub.y wherein: A is one or more element selected from Ni, Ru, Rh, Pd, Ir, Pt and Ag, B is one or more element selected from Sn, Sb, Pb, Zn, Ga, In, Ge and As, x is in the range 0.1-10, y in is in the range 0.1-10.

This invention relates to a method for preparing 1,4-cyclohexanedimethanol (CHDM), more specifically to a method for preparing 1,4-cyclohexanedimethanol having a high rate of trans isomers without an isomerization reaction step, wherein two-step hydrogenation reactions and a purification step are conducted using terephthalic acid as starting material.

This invention relates to a method for preparing 1,4-cyclohexanedimethanol(CHDM), more specifically to a method for preparing 1,4-cyclohexanedimethanol having a high rate of trans isomers without an isomerization reaction step.