Other

Chubu Chelest Co., Ltd.

Chelest Corporation

Showa Denko K.k.

Nomura Micro Science Co., Ltd.

Chelest Corporation and Chubu Chelest Co., Ltd.

Nobuyoshi Nambu

Osamu Ito

Masanori Furukawa

Atsushi Nakamura

Makoto Saito

Tohru Yamamoto

Hidetoshi Saitoh

Takao Doi

Shigeo Ohshio

Nobutake Mihara

Ryo Satoh

Hiroshi Ito

Mitsugu Abe

Koujirou Nagatsuka

Masaaki Ogitsu

Shiho Sato

Shiho Horiuchi

Kazuo Inomata

A material for purification of a semiconductor polishing slurry that without changing of pH value, is capable of efficiently purifying a polishing slurry to thereby not only prevent metal contamination of a polished object as effectively as possible but also achieve recycling of a polishing slurry without any problem; a relevant module for purification of a semiconductor polishing slurry; and a process for purifying a semiconductor polishing slurry with the use thereof. In particular, a material for purification of a semiconductor polishing slurry characterized in that it comprises a fibrous substrate having a functional group capable of forming a metal chelate or such a functional group together with hydroxyl fixed onto at least the surface thereof. This material for purification of a semiconductor polishing slurry is, for example, used in such a manner that it is inserted in a container fitted with polishing slurry inflow port and outflow port while ensuring passage of polishing slurry flow.

Material for purification of semiconductor polishing slurry, module for purification of semiconductor polishing slurry and process for producing semiconductor polishing slurry

A process for producing a metal oxide phosphor includes a step of firing a powder containing an organic metal chelate complex including a plurality of metals constituting the metal oxide at a uniform composition, whereby produced is a metal oxide phosphor having substantially spherical shape with substantially uniform particle size and excellent luminance properties.

Process for producing fluorescent metal oxide material

A fiber capable of forming a metal chelate and a process for producing the same are disclosed, wherein the fiber is characterized in that at least one metal chelate-forming compound selected from the group consisting of aminodicarboxylic acids, aminocarboxylic acids, thiocarboxylic acids and phosphoric acid, which are reactive with a glycidyl group, is bonded to a molecule of a natural fiber or regenerated fiber through a crosslinkable compound having a reactive double bond and a glycidyl group in its molecule. There are also disclosed a method of capturing metal ions using the fiber and a metal chelate fiber which can effectively make use of the characteristics of the metals and can be easily discarded or incinerated.

Fiber capable of forming metal chelate, process for producing the same, method of trapping metal ion with the fiber, and metal chelate fiber

A chelate-forming filter which comprises a filter medium made of natural, regenerated, or synthetic fibers wherein the fiber molecules have, incorporated therein, chelate-forming functional groups represented by general formula (1) [wherein G represents a residue of a chain sugar alcohol or of a polyhydric alcohol; and R represents hydrogen, (lower) alkyl, or -G (wherein G has the same meaning as the above G, and the two G's may be the same or different)] or (3) (wherein R, R, and Reach represents lower alkylene; and n is an integer of 1 to 4).

Chelate-forming filter, process for producing the same, and method of purifying liquid using the filter

A fiber capable of forming a metal chelate and a process for producing the same are disclosed, wherein the fiber is characterized in that at least one metal chelate-forming compound selected from the group consisting of aminocarboxylic acid, aminocarboxylic acid, thiocarboxylic acid and phosphoric acid, which are reactive with a glycidyl group, is bonded to a molecule of a synthetic fiber through a crosslinkable compound having a reactive double bond and a glycidyl group in its molecule. The chelate-forming fiber is excellent in capturing harmful heavy metal ions and can be easily produced in a simple and safe way at a low cost.

Metal chelate-forming fiber, process for producing the same, method of trapping metal ion with the fiber, and metal chelate fiber

A process for forming a thin metal oxide film is disclosed that comprises molding an amorphous powder of organic metal chelate complexes to obtain a target. The process also includes subjecting the target to a PVD process that forms the thin metal oxide.

Process for producing thin metal oxide film

A process for preparing a target for use in production of a thin metal oxide film that comprises molding an amorphous powder of organic metal chelate complexes to obtain the target. The process also includes mixing metallic materials with an organic chelating agent so as to give a predetermined metal composition to prepare a transparent aqueous solution of organic metal chelate complexes. The process also includes spray-drying the aqueous solution to obtain an amorphous powder of the organic metal chelate complexes.

Process for preparing a target for use in the production of a thin metal oxide film

Diammonium ruthenium diethylenetriaminepentaacetate represented by formula (1) or hydrate thereof, which are water-soluble and excellent in handling and exhibit such high stability both in the air and in an aqueous solution as to withstand long-term storage. These novel compounds are useful as the catalyst for the synthesis of ammonia, the hydrogenation catalyst for carbonyl compounds or aromatic compounds, the raw material for the production of ruthenium-base metal oxide ceramics, and so on.

Diammonium ruthenium diethylenethriaminepentaacetate or hydrates thereof and process for the preparation of both

An amino acid-N,N-diacetic acid (AADA) or its salt with an equivalent or less of an alkali metal is produced by reducing, through electrodialysis, alkali metal ions from an aqueous solution of the alkali metal salt of an AADA. By this configuration, an AADA salt can be produced in a much higher yield than conventional equivalents without requiring a regeneration operation of a resin as in the use of an ion exchange resin or without requiring crystallization-separation of crystals of the AADA salt as in the addition of an organic solvent. A salt of an amino acid-N,N-diacetic acid is also produced by reacting an AADA with any of metal oxides, metal hydroxides, metal carbonates, metal hydrogencarbonates, ammonium hydroxide, ammonium carbonate, ammonium hydrogencarbonate or organic amine compounds. By this configuration, a metal salt, aromonium salt or organic amine salt of an AADA can be produced with efficiency without the formation of by-products.

Process for producing an amino acid-N, N-diacetic acid and its salts

An amino acid-N,N-diacetic acid (AADA) or its salt with an equivalent or less of an alkali metal is produced by reducing, through electrodialysis, alkali metal ions from an aqueous solution of the alkali metal salt of an AADA. By this configuration, an AADA salt can be produced in a much higher yield than conventional equivalents without requiring a regeneration operation of a resin as in the use of an ion exchange resin or without requiring crystallization-separation of crystals of the AADA salt as in the addition of an organic solvent. A salt of an amino acid-N,N-diacetic acid is also produced by reacting an AADA with any of metal oxides, metal hydroxides, metal carbonates, metal hydrogencarbonates, ammonium hydroxide, ammonium carbonate, ammonium hydrogencarbonate or organic amine compounds. By this configuration, a metal salt, ammonium salt or organic amine salt of an AADA can be produced with efficiency without the formation of by-products.

Process for producing an amino acid-N,N-diacetic acid and its salts

A chelate-forming fiber which has, in a fiber molecule, a group having an amino group and at least two hydroxyl groups bonded to carbon (preferably a group represented by the formula (1) described below), and has a capability of forming a chelate with metalloid elements including boron and germanium and compounds thereof, and which can be easily incinerated and can be prepared in a simple and safe manner at low cost; and a process for preparing the same; and a method for capturing metalloids or compounds thereof using the chelate-forming fiber are disclosed.

Chelate-forming fiber, process for preparing the same, and use thereof

A high-concentration liquid detergent composition, which does not have strong alkalinity, which has excellent compatibility even if the surfactant concentration is increased, and which is free of white turbidity, comprising (A) one or more surfactants selected from a nonionic surfactant and an anionic surfactant, (B) one or more builders selected from an amine salt and an alkali metal-amine mixed salt of aminopolycarboxylic acid chelating agent, and (C) one or more solubilizing agents selected from alcohols, with component (A) being present in a concentration of 20 wt % or more.

Liquid detergent composition

The present invention provides a novel fibrous chelate-forming material to which a capability of forming a chelate with metal is imparted by introducing a specific acyl group represented by the following general formula &lsqb;1&rsqb; or &lsqb;2&rsqb;, and also discloses a novel process for producing a chelate-forming fiber, a process for sequestering with the same, and a filter capable of simultaneously removing impurities and metal ions in a fluid is imparted using the chelate-forming fiber.

Growing community of inventors

Yokkaichi, Japan

Nobuyoshi Nambu