Sumitomo Chemical Company, Limited

Masayuki Yoshii

Tetsuya Suzuta

Kiyoshi Iwanaga

Shinjiro Ishihara

Shigeru Goto

Koji Shinohara

Yasuhiko Mori

Kenji Itoh

Shoko Ikeda

Makoto Murata

The objective of the present invention is to provide a method for the highly selective production of dipropylene glycol containing 1,1'-oxybis-2-propanol in a proportion of 0.10 to 0.70 and/or tripropylene glycol containing 1,1&#x2032;-[(1-methyl-1,2-ethanediyl)bis(oxy)]bis-2-propanol in a proportion of 0.10 to 0.70. The present invention is a method for producing dipropylene glycol containing 1,1&#x2032;-oxybis-2-propanol in a proportion of 0.10 to 0.70 and/or tripropylene glycol containing 1,1&#x2032;-[(1-methyl-1,2-ethanediyl)bis(oxy)]bis-2-propanol in a proportion of 0.10 to 0.70, the method comprising a reaction step of making a reactant comprising propylene oxide and water react in the presence of a catalyst, wherein the catalyst comprises at least one element selected from the group consisting of vanadium, niobium, and tantalum, and the Hammett acidity function (H) of the catalyst satisfies H&#x2266;9.3.

Method for producing glycols from oxirane compounds

There is provided a method for producing dipropylene glycol (DPG) and/or tripropylene glycol (TPG) including: (A) reacting a raw material liquid including propylene oxide and water to obtain a reaction liquid including unreacted water, propylene glycol (PG), DPG and/or TPG, and an alcohol compound excluding PG, DPG, and TPG; (B) separating, from the reaction liquid, a first liquid containing water and the alcohol compound and a second liquid containing the PG, DPG and/or TPG and optionally the alcohol compound; (C) removing a part of the alcohol compound from the first liquid to obtain a third liquid containing water and optionally a part of the alcohol compound; (D) separating, from the second liquid, a fourth liquid containing the PG and optionally the alcohol compound, and a fifth liquid containing the DPG and/or TPG and optionally the alcohol compound; and (E) recycling a part of the third liquid to step (A).

Method for producing glycols from oxirane compound

A process for producing an alkylbenzene hydroperoxide from an alkylbenzene solution containing 0.01 to 10 mmol/kg of phenols by subjecting the solution to oxidation with an oxygen-containing gas, including allowing a compound represented by formula (I) to be present in the alkylbenzene solution: wherein R, R, R, Rand Rindependently represent a hydrogen atom, an alkyl group or an aryl group and may combine with each other to form a non-aromatic ring, the molar ratio of the compound represented by formula (I) to the phenols in the alkylbenzene solution being 0.4 mol/mol or higher;is advantageous in providing economical and high-yield production of an alkylbenzene hydroperoxide.

Process for producing alkylbenzene hydroperoxide

A process for producing chlorine comprising the step of oxidizing hydrogen chloride in a gas containing hydrogen chloride with a gas containing oxygen in the presence of a catalyst, wherein the oxidation of hydrogen chloride is carried out in at least two reaction zones each comprising a catalyst-packed layer, which are arranged in series, and a temperature in at least one of said reaction zones is controlled with a heat exchange system. According to this process, the stable activity of the catalyst is maintained and chlorine can be stably obtained at a high yield since the excessive hot spot in the catalyst-packed layer is suppressed and the catalyst-packed layer can be effectively used.

Method for producing chlorine

A process for producing chlorine comprising the step of oxidizing hydrogen chloride in a gas containing hydrogen chloride with a gas containing oxygen in a fixed bed reaction system having a reaction zone comprising a catalyst-packed layer, wherein a superficial linear velocity of the gas in a column is from 0.70 to 10 m/sec. According to this process, the stable activity of the catalyst is maintained and chlorine can be stably obtained at a high yield since the excessive hot spot in the catalyst-packed layer is suppressed and the catalyst-packed layer can be effectively used.

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Ichihara, Japan

Masayuki Yoshii