Asahi Kasei Kogyo Kabushiki Kaisha

Asahi Kasei Chemicals Corporation

Asahi Kasei Kabushiki Kaisha

Hajime Nagahara

Ken Suzuki

Hidenori Hinago

Hiroshi Yokoyama

Toshiya Aoki

Nobuhisa Miyake

Mitsuo Konishi

Noritaka Tanimura

Hideyuki Ariyasu

Mitsuji Ono

Koji Nakagawa

Shigeo Tazuke

Yuichi Fujii

Satoru Ohtsuki

Tadashi Tanaka

Asima Sultana

Provided is a production method of glycolic acid having a first step of preparing glycolonitrile from formaldehyde and hydrocyanic acid and a second step of hydrolyzing the glycolonitrile into glycolic acid directly or via a glycolate salt, which method can produce glycolic acid in easy production and purification steps while consuming less energy. In the production method, by carrying out the first and second steps continuously or by storing the glycolonitrile obtained in the first step at pH 4 or less and carrying out a hydrolysis reaction of the second step at from pH 5 to 9, a production yield of glycolic acid, activity for the production of glycolic acid and accumulated concentration of glycolic acid are improved, resulting in the production of glycolic acid having an improved purity and quality.

Method for producing glycolic acid

The present invention provides a nitrogen-containing carbon material characterized in that it satisfies a specific relational expression between the number ratio of nitrogen atoms to carbon atoms and the number ratio of hydrogen atoms to carbon atoms and has peaks in specific regions in the X-ray diffraction and in the laser Raman spectrum. The nitrogen-containing carbon material of the present invention can be produced by carbonizing azulmic acid in an inert gas atmosphere, and it is useful as an electrode material or the like because it has a high nitrogen content and a low hydrogen content.

Nitrogen-containing carbon material and method of producing the same

A method for producing a carbonic ester, comprising (1) performing a reaction between an organometal compound having a metal-oxygen-carbon linkage and carbon dioxide to obtain a reaction mixture containing a carbonic ester formed by the reaction, (2) separating the carbonic ester from the reaction mixture to obtain a residual liquid, and (3) reacting the residual liquid with an alcohol to form an organometal compound having a metal-oxygen-carbon linkage and form water and removing the water from the organometal compound, wherein the organometal compound obtained in step (3) is recovered for recycle thereof to step (1).

Process for producing carbonic ester

A method for producing cyclohexanone oxime, which comprises the steps of (1) subjecting to an amination reaction a starting material selected from the group consisting of cyclohexanol, cyclohexanone and a mixture thereof, thereby obtaining cyclohexylamine, and (2) subjecting the obtained cyclohexylamine to a partial oxidation reaction, thereby obtaining cyclohexanone oxime, wherein a by-product (&#x3b1;) formed in the step (1) and/or a by-product (&#x3b2;) formed in the step (2) are/is recycled to a reaction system of the amination reaction in the step (1).

Process for preparation of cyclohexanone oxime

A method for producing a lactam, which comprises subjecting an alicyclic primary amine to an oxidation reaction in the presence of a catalyst comprising a silicon oxide, to thereby obtain a lactam. A catalyst comprising a silicon oxide which is for use in the above-mentioned method.

Process for producing lactam

Disclosed is a method for producing a cyclic aliphatic oxime, which comprises subjecting a cyclic aliphatic primary amine to oxidation in the liquid phase under superatmospheric pressure in the presence of molecular oxygen and a solid catalyst, wherein the solid catalyst comprises an oxide of at least one metal (a) selected from the group consisting of metals belonging to Groups 5 and 6 of the Periodic Table.

Process for producing a cyclic aliphatic oxime

A method for producing cyclohexanone oxime, comprising the steps of:

Process for producing cyclohexanone oxime

Process for stabilizing oxymethylene copolymer

High-rigidity oxymethylene polymer resin molding

Polyacetal resin composition exhibiting high retentivity of mechanical

A method for pretreating a slurry containing a ruthenium catalyst for use in the continuous partial hydrogenation of monocyclic aromatic hydrocarbons is disclosed. In this method, the above-mentioned slurry is heat-treated at a temperature of from 60.degree. to 180.degree. C. for at least 10 minutes while agitating. By using the pretreated catalyst slurry in the above-mentioned continuous partial hydrogenation, partial hydrogenation reaction products can be efficiently obtained without suffering from the excess mixing of the components of the catalyst slurry into an oil phase containing the partial hydrogenation reaction products, thereby enabling operations and facilities required for separation to be simplified.

Method for pretreating a catalyst slurry and a method for the continuous

A process for producing a cycloolefin in high selectivity and yield by partial hydrogenation of a monocyclic armoatic hydrocarbon with hydrogen is disclosed. In this process, the hydrogenation reaction is carried out under a neutral or acidic condition in the presence of:

Process for producing cycloolefins

An electron acceptor polycondensation polymer of the formula (I) ##STR1## wherein R.sub.1 is a hydrogen atom or an alkyl group, an aryl group or an aralkyl group having not more than 15 carbon atoms; C.sub.m is a divalent connecting group; FLac is an electron acceptor group having a fluorene nucleus as its basic structure; X and Y are a carbonyl group or an acid amide group forming a urethane linkage with the oxygen atom of the diol; R.sub.2 is a bifunctional organic residue having not more than 20 carbon atoms, n is a number greater than 10 which represents the degree of polycondensation of the resultant polycondensation polymer.

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Tokyo, Japan

Hajime Nagahara