Teijin Petrochemical Industries, Ltd.

Teijin Limited

Akio Namatame

Koji Sumitani

Tamio Onodera

Kimihiko Sato

Keizo Shimada

Seiji Itoh

Risuke Suzuki

Method for preparing dialkylnaphthalene

A process for producing m-xylene, which comprises isomerizing a hydrocarbon material containing o-xylene as a main ingredient in the presence of a catalyst composition comprising zeolite ZSM-4 and/or zeolite omega under such conditions that m-xylene is selectively formed, and recovering m-xylene by distillation from the resulting isomerization mixture containing o-xylene and m-xylene as main ingredients.

Process for producing M-xylene from O-xylene

A process for continuously isomerizing xylene, which comprises subjecting a hydrocarbon feed material comprising a major proportion of a xylene isomer mixture and a minor proportion of non-aromatic hydrocarbons to xylene isomerization reaction, isolating a specific xylene isomer from the resulting isomerization reaction mixture, and recycling the remaining hydrocarbon mixture to the xylene isomerization reaction; wherein the hydrocarbon feed material or the xylene isomerization reaction mixture is treated with hydrogen in the presence of a cracking catalyst comprising

Process for isomerizing xylene

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Matsuyama, Japan

Akio Namatame