The purpose of the present invention is to provide a method for producing oligosilane, the method being capable of more efficiently producing the desired oligosilane. The method for producing oligosilane comprises a reaction step in which a hydrosilane-containing fluid is introduced into a continuous reactor having a catalyst layer therein, oligosilane is produced from hydrosilane, and an oligosilane-containing fluid is discharged from the reactor, wherein the reaction step satisfy all of conditions (i)-(iii) below such that the desired oligosilane can be more efficiently produced. (i) The temperature of the hydrosilane-containing fluid at the inlet of the catalyst layer is higher than that of the oligosilane-containing fluid at the outlet of the catalyst layer. (ii) The temperature of the hydrosilane-containing fluid at the inlet of the catalyst layer is 200-400°C. (iii) The temperature of the oligosilane-containing fluid at the outlet of the catalyst layer is 50-300°C.

Method for producing oligosilane

PROBLEM TO BE SOLVED: To provide a highly-active immobilized palladium catalyst which is prepared by utilizing an inexpensive polydimethylsilane and does not cause activity deterioration even in repeated use or long term use.SOLUTION: The immobilized palladium catalyst is obtained by making polymethylsilane and metal oxide carry palladium in such a state that the polymethylsilane and the metal oxide are dispersed in a solvent, and then separating insoluble matters from the solvent. In the immobilizing stage, the palladium becomes a palladium cluster having a diameter of several nm to be supported. The obtained immobilized palladium catalyst is highly active, and hardly causes activity deterioration even in repeated use or long term use.

Immobilized palladium catalyst

PROBLEM TO BE SOLVED: To provide a more highly active ruthenium/palladium both-supporting catalyst, which is used when producing an alicyclic carboxylic acid by hydrogenating an aromatic ring of an aromatic carboxylic acidSOLUTION: There is provided a ruthenium/palladium both-supporting catalyst improved in catalytic activity thanks to a larger degree of metal dispersion of particles each containing ruthenium and palladium, the dispersion being achieved by contacting a ruthenium compound and a palladium compound with an organic alkali after the compounds are supported by a support Here, the catalyst exists in a form of the particle containing ruthenium and palladium, on a surface of the support, the metal dispersion is 46% or more There is also provided a method for producing the ruthenium/palladium both-supporting catalyst, that uses various salts or complexes as the ruthenium compound and the palladium compound, among which especially preferable are chlorides The preferable method uses a chloride and chlorine thereof is removed through reaction with the organic alkali The support of the ruthenium/palladium both-supporting catalyst is at least one kind selected from the group consisting of alumina, zirconia, ceria, titania and silica

Catalyst for hydrogenating aromatic carboxylic acids, and method for producing the same

The invention relates to a polymer comprising certain specific units. The invention further relates to processes for making the polymer of the invention. The invention further relates to a binder and compositions comprising the polymer, preferably to compositions suitable for paints and coatings. The invention relates in particular to water-borne, solvent-borne and powder coating compositions and preferably to curable water-borne, curable solvent-borne and curable powder coating compositions. The invention further relates to cured compositions. The invention further relates to objects, in particular coatings prepared from the compositions of the invention. The invention further relates to processes for making the compositions of the invention. The invention further relates to articles having coated thereon the compositions of the invention. The invention further relates to articles having coated and cured thereon the compositions of the invention. The invention further relates to various uses of the polymer of the invention, the binder of the invention, the composition of the invention, the cured composition of the invention and various uses of articles having coated and optionally cured thereon the compositions of the invention.

Polymers, processes, compositions & uses

PROBLEM TO BE SOLVED: To provide a capillary, to provide a method for immobilizing a catalyst to a capillary, to provide a micro-reactor and to provide a solid phase-liquid phase-gas phase reaction method using the micro-reactor. SOLUTION: The micro-reactor 1 is provided with a capillary 2, a reaction solution supplying part 10 to supply a solution as the liquid phase in which a substrate is dissolved to the capillary 2, a gas supplying part 20 to supply a gas as the gas phase to the capillary 2 and a recovery part 30 to recover the reaction product in the capillary 2. The capillary 2 has a tube body 3. A high polymer molecule film 4 coating the inner wall 3a of the tube body is formed to keep a high polymer carcerand type catalyst 5 having a metal catalyst as the solid phase internally capsuled carried by the high polymer molecule film 4. One end of the capillary 2 is connected with the reaction solution supplying part 10 and the gas supplying part 20. The other part 30 is connected with the recovery part. The gas 22 to react with the solution 7 having the substrate 6 dissolved therein and the substrate 6 is allowed to continuously flow at a predetermined flow rate to the capillary 2. COPYRIGHT: (C)2009,JPO&INPIT

Capillary, method for immobilizing catalyst to capillary, micro-reactor and solid phase-liquid phase-gas phase reaction method using the same

PROBLEM TO BE SOLVED: To provide a polymer fixed transition metal catalyst fixing an organic polymer with a transition metal, having high activity, and easy in recovery and reuse. SOLUTION: Various transition metals are carried by polysilane, or a polysilane compound and an inorganic compound by combining a microencapsulation method with ligand exchange or reduction operation using the polysilane compound, or the poly silane compound and the inorganic compound. Polysilane carried with the transition metal can easily be cured by heating, microwave irradiation, ultraviolet irradiation or a chemical method such as a hydrosilylation reaction, and is insoluble to various solvents while maintaining the activity of a catalyst. Further, carrying this polysilane-carrying transition metal catalyst on the inorganic compound enhances stability and operability. These polysilane-carrying transition metal catalysts exhibit high activity to a hydrogenation reaction, the hydrosilylation reaction, a Heck reaction, a Suzuki-Miyaura coupling reaction or the like, are easy in recovery and reuse, and are extremely small in metal leakage. COPYRIGHT: (C)2008,JPO&INPIT

Polysilane-carrying transition metal catalyst

PROBLEM TO BE SOLVED: To provide an organic synthesis reaction method using a polymer-fixed ruthenium catalyst prepared by fixing a ruthenium catalyst in an amphiphilic cross-linkable polymer. SOLUTION: The polymer-fixed ruthenium catalyst is obtained by supporting ruthenium on a cross-linked polymer. The cross-linked polymer is obtained by cross-linking a cross-linkable polymer having an aromatic side chain and a hydrophilic side chain. This polymer-fixed ruthenium catalyst is preferably obtained, for example, by supporting a hyperfine particle of ruthenium on the cross-linkable polymer in a solution containing a polar solvent to form a micell and subjecting the ruthenium-supported cross-linkable polymer to a cross-linkage reaction. This polymer-fixed ruthenium catalyst can be used in an oxidation reaction of alcohol or a sulfide. COPYRIGHT: (C)2006,JPO&NCIPI

Polymer-fixed ruthenium catalyst and its use

PROBLEM TO BE SOLVED: To provide an inexpensive catalyst to enable the production of a polycarbonate having narrow molecular weight distribution in high productivity and selectivity by reacting an epoxide with carbon dioxide in the presence of the catalyst, and a method for producing a polycarbonate. SOLUTION: An epoxide is made to react with carbon dioxide in the presence of at least one catalyst selected from mixtures of one or more compounds selected from scandium alkoxides, scandium halides and scandium triflate and one or more compounds selected from metal alkoxides, metal halides and metal halide alkoxides of titanium, zirconium, hafnium or cerium. COPYRIGHT: (C)2010,JPO&INPIT

Catalyst for polycarbonate production and method for producing polycarbonate

PROBLEM TO BE SOLVED: To provide a method for selectively and highly efficiently producing as a useful substance a cis-phospholane-2-carboxylic acid derivative which is newly found to have an asymmetry-inducing effect, and to provide an asymmetric ligand obtained by the method or a compound capable of react-inducing the asymmetric ligand. SOLUTION: This method for producing the 1-arylphospholane-2-carboxylic acid borane complex, comprising reacting a 1-arylphospholane borane complex with an alkyl lithium and then with carbon dioxide, is characterized by controlling the production ratio of the cis isomer to the trans isomer by the change of a rate for introducing carbon dioxide gas into the reaction system to preferentially produce the cis isomer. COPYRIGHT: (C)2006,JPO&NCIPI

(1S,2S)- OR (1R,2R)-cis-1-ARYLPHOSPHOLANE-2-CARBOXYLIC ACID BORANE COMPLEX AND METHOD FOR PRODUCING THE SAME

PROBLEM TO BE SOLVED: To provide a method for quantitatively recovering a silicon component by-produced by the aldol reaction of an aldehyde with a silicon enolate SOLUTION: This method for recovering the silicon component in a stereoselective synthesis process by the aldol reaction of the aldehyde with the silicon enolate is characterized by comprising the following steps Step 1: a step for aldol-reacting the aldehyde compound of raw material with the silicon enolate composition [general formula: R a 3 Si-O-X (R a is an alkyl; X is an arbitrary substituent)] of raw material in the presence of a chiral ligand to perform stereoselective synthesis, Step 2: a step for distilling the reaction solution of Step 1 to separate the silicon component together with a solvent as a distillate, and Step 3: a step for treating the distillate of the Step 2 with concentrated sulfuric acid to obtain the produced silicon ether composition [general formula: (R a 3 Si) 2 O] and simultaneously recover the silicon compound by a precision distillation COPYRIGHT: (C)2006,JPO&NCIPI

Akiyama Makoto

Papers

Polysilane-carrying transition metal catalyst

Polymer-fixed ruthenium catalyst and its use

Catalyst for polycarbonate production and method for producing polycarbonate

(1S,2S)- OR (1R,2R)-cis-1-ARYLPHOSPHOLANE-2-CARBOXYLIC ACID BORANE COMPLEX AND METHOD FOR PRODUCING THE SAME

Method for recovering silicon component in stereoselective synthesis process