Toda Kogyo Corporation

Mitsubishi Rayon Company, Limited

Other

Sumitomo Special Metals Co., Ltd.

Toshiki Matsui

Tomoyuki Imai

Yasuhiko Fujii

Tomoko Okita

Satoshi Hatakeyama

Hiroshi Inoue

Masaki Ishihara

Yoshiyuki Himeno

Masaru Isoai

Nanao Horiishi

Ken Ooyachi

Wataru Ninomiya

Takaki Hamada

Toshiya Yasukawa

Atsushi Hamamura

Masayuki Ukita

Takashi Okamura

Tatsuaki Baba

Hiroko Nakamura

Kojiro Tsutsumi

Toshiyuki Hakata

Suminori Tanaka

Kazunori Matake

Toshiaki Shimuzu

Disclosed is a palladium-containing catalyst which enables to produce an &#x3b1;,&#x3b2;-unsaturated carboxylic acid in high selectivity from an olefin or an &#x3b1;,&#x3b2;-unsaturated aldehyde. Also disclosed are a method for producing such a catalyst and a method for producing an &#x3b1;,&#x3b2;-unsaturated carboxylic acid using such a catalyst. Specifically disclosed is a palladium-containing catalyst containing 0.001 to 0.25 mole of antimony element to 1 mole of palladium element or a palladium-containing catalyst containing palladium element which composes a metal, tellurium element, and bismuth element.

Palladium-containing catalyst, method for producing same, and method for producing &#x3b1;, &#x3b2;-unsaturated carboxylic acid

Palladium-containing catalyst, method for producing same, and method for producing &#x3b1;,&#x3b2;-unsaturated carboxylic acid

Disclosed is a method for producing an &#x3b1;, &#x3b2;-unsaturated carboxylic acid from an olefin or an &#x3b1;, &#x3b2;-unsaturated aldehyde, while suppressing dissolution of a silica carrier, which is a carrier for a silica-supported noble metal-containing catalyst, in a water-containing solvent. Specifically disclosed is a method for producing an &#x3b1;, &#x3b2;-unsaturated carboxylic acid through oxidation of an olefin or an &#x3b1;, &#x3b2;-unsaturated aldehyde in a water-containing solvent in the presence of a silica-supported noble metal-containing catalyst in a reactor, in which at least one of silicic acid and ions thereof is supplied into the reactor.

Method for producing alpha, beta-unsaturated calboxylic acid

An iron compound catalyst for inhibiting the generation of dioxin contains iron oxide particles, iron oxide hydroxide particles or mixed particles having a catalytic activity capable of converting not less than 15% of carbon monoxide into carbon dioxide when 2.8&times;10&minus;4 mol of iron oxide particles obtained by heat-treating the iron compound catalyst in air at a temperature of 800&deg; C. for 15 minutes, are instantaneously contacted with 6.1&times;10&minus;7 mol of carbon monoxide at a temperature of 250&deg; C. at a space velocity (SV) of 42,400 h&minus;1 in an inert gas atmosphere using a pulse catalytic reactor, the iron oxide particles or the iron oxide hydroxide particles have an average particle size of 0.01 to 2.0 &mgr;m, a BET specific surface area of 0.2 to 200 m2/g, a phosphorus content of not more than 0.02% by weight, a sulfur content of not more than 0.6% by weight and a sodium content of not more than 0.5% by weight. This iron compound catalyst enables complete combustion of municipal solid waste and decomposition of dioxin precursors even at a low combustion temperature in intermittently operated incinerators such as mechanical batch incinerators or semi-continuous incinerators, and can inhibit dioxin generation of due to a memory effect upon low-temperature combustion at the start-up or shut-down of the incinerators, without large-scale incinerator renovation or plant and equipment investment.

Iron compound catalyst for inhibiting generation of dioxin

The present invention relates to a process for treating a dioxin-containing exhaust gas which can inhibit the generation of dioxin occurring either in the course of cooling of the exhaust gas between a downstream portion subsequent to a combustion chamber and a dust collector or due to a memory effect upon low-temperature combustion in flues or dust collector at the start-up or shut-down of intermittent operation-type solid waste incinerators, without large-scale incineration facilities or plant renovation and equipment investment, and a composite catalyst composition for inhibiting the generation of dioxin, comprising an iron compound, an acid gas neutralizing agent and optionally an activated carbon.

Process for treating dioxin-containing exhaust gas and composite catalyst composition for inhibiting generation of dioxin

Calcium-iron oxide composite particles

Method for treating organohalogen compound-containing soil or ash

Composite catalyst composition for inhibiting generation of dioxin

Resin composition and laminated film

An iron compound catalyst for inhibiting the generation of dioxin of the present invention, comprise iron oxide particles, iron oxide hydroxide particles or mixed particles thereof having a catalytic activity capable of converting not less than 15 % of carbon monoxide into carbon dioxide when 2.8&times;10,mol of iron oxide particles obtained by heat-treating said iron compound catalyst in air at a temperature of 800&deg; C. for 15 minutes, are instantaneously contacted with 6.1&times;10,mol of carbon monoxide at a temperature of 250&deg; C. at a space velocity (SV) of 42,400 h,in an inert gas atmosphere using a pulse catalytic reactor, the iron oxide particles or said iron oxide hydroxide particles having an average particle size of 0.01 to 2.0 &mgr;m, a BET specific surface area of 0.2 to 200 m,/g, a phosphorus content of not more than 0.02 % by weight, a sulfur content of not more than 0.6 % by weight and a sodium content of not more than 0.5 % by weight. Such an iron compound catalyst enables complete combustion of the municipal solid waste and decomposition of dioxin precursors even at a low combustion temperature in intermittently operated incinerators such as mechanical batch incinerators or semi-continuous incinerators, and can inhibit the generation of dioxin due to a memory effect upon low-temperature combustion at the start-up or shut-down of the incinerators, without large-scale incinerator renovation or plant and equipment investment.

Iron compound catalyst for inhibiting generation of dioxin and incineration process of municipal solid waste using the same

Catalyst for decomposing organohalogen compound

Calcium-iron oxide composite particles and resin molded product containing the same

A method of decoloring a colored concrete, comprises adding to the colored concrete, a decoloring pigment comprising a titanium oxide pigment, or a titanium oxide pigment and a pigment having a complementary color relative to color of the colored concrete. Such method can decolore the color of the colored concrete residue which attaches to or remains in production facilities in order to return a color thereof to that of an ordinary plain concrete, without works or treatments for washing-out or removing the colored concrete residue which attaches to or remains in the production facilities, in which the works or treatments are required in the case where the production facilities are used for the production of an ordinary plain concrete after the colored concrete has been produced therein, and without works or treatments for purifying a waste water generated upon washing-out or removing the residue and for making the waste water harmless; and a pigment used therefor.

Method of decoloring colored concrete

To obtain an anticorrosive Fe-B-R type permanent magnet; in particular, to reduce deterioration rate of the initial magnetic properties below 10% after the magnet has been kept at 80.degree. C. in 90% relative humidity for 500 hours, the surface of the sintered permanent magnet is coated with metallic coating film layers of at least one noble metal layer and at least one base metal layer disposed on the noble metal layer. Diffusion heat treatment further improves the adhesiveness of the coating film layers.

Process for producing a corrosion resistant permanent magnet

Corrosion resistant permanent magnet

Growing community of inventors

Hiroshima, Japan

Toshiki Matsui