Mitsubishi Gas Chemical Company, Inc.

Susumu Naito

Takashi Suzuki

Yuzi Onda

Hidetaka Kiga

Koichi Abe

Tomoji Tsuji

Shoichi Kobayashi

Akira Tateishi

Tohru Nakamura

Koichi Kitahara

Takeshi Igarashi

Takao Kouzai

Ritoko Ikeda

A method for producing a hydrocyanic acid synthesis catalyst is disclosed which comprises sequential exposure of an iron surface, such as, for example, pig iron, to sequential oxidative and reductive atmospheres, preferably using repetitive cycles, the oxidative atmosphere preferably containing 5% to 3% by volume oxygen and the reductive atmosphere preferably containing 1% to 99% hydrogen.

Method for producing hydrocyanic acid synthesis catalyst

Disclosed is a process for producing bis(aminomethyl)cyclohexane, which comprises hydrogenating a xylylenediamine in the presence of a catalyst and at least one solvent selected from the group consisting alkylamines and alkylenediamines.

Process for producing bis (aminomethyl) cyclohexane

Disclosed is a process for preparing, .alpha., .beta.-unsaturated carboxylic acid ester from .alpha.-hydroxycarboxylic acid ester, a .alpha.-alkoxycarboxylic acid ester or .beta.-alkoxycarboxylic acid ester as a starting material by a vapor-phase catalytic reaction in the presence of a crystalline aluminosilicate modified with an alkali metal and a platinum group element as a catalyst. According to the process, .alpha., .beta.-unsaturated carboxylic acid can be produced efficiently.

Process for preparing unsaturated carboxylic acid ester

A process for producing an acyloxynaphthoic acid represented by the general formula ##STR1## wherein R.sub.1 represents a hydrogen atom or an alkyl group, which comprises

Process for producing acyloxynaphthoic acids

Trimellitic acid is produced in higher yield by liquid phase air oxidation of pseudocumene in acetic acid as a solvent in the presence of cobalt, manganese, and bromine as a catalyst, where the oxidation is carried out at two stages comprising a first stage of reaction at a temperature of 110.degree. to 170.degree. C. and a second stage of reaction at a temperature of 180.degree. to 240.degree. C. while maintaining a reaction pressure under a condition of the following formula throughout the reaction:

Process for producing trimellitic acid

Terephthalic acid having a purity of 99% or more can be produced in a yield of 95% by mole or more by oxidizing p-tolualdehyde or a mixture of p-tolualdehyde and p-toluic acid with molecular oxygen in a solvent in the presence of a cobalt salt catalyst under the conditions that (1) a Co/solvent ratio is 0.05 to 0.70% by weight and (2) a toluic acid/Co ratio is 0.1 to 3.0 moles/gram atom, without using either a promoter or an oxidation accelerator.

Process for producing terephthalic acid

Formate esters of the general formula HCOOAr wherein Ar is an aromatic hydrocarbon group containing an alkyl substituent are prepared by oxidizing alkyl aromatic aldehydes of the general formula ArCHO wherein Ar is the same as defined above with organic peroxy acids in the presence of hydrogen fluoride.

Process for preparing formate esters of alkyl-substituted aromatic

This invention relates to a process for producing alkylphenols by oxidation of alkyl-substituted aromatic aldehydes with hydrogen peroxide in the presence of hydrogen fluoride and hydrolysis thereof. More particularly, under the presence of hydrogen fluoride alkyl substituted aromatic aldehydes are oxidized and converted selectively to aromatic alkyl phenol formates by hydrogen peroxide, without converting to corresponding aromatic carboxylic acid. After the completion of the oxidizing reaction, the produced alkyl phenol formates are hydrolyzed to corresponding alkyl phenols at the time of removing the remaining hydrogen fluoride by distillation.

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Niigata-ken, Japan

Susumu Naito