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Director-general of Agency of Industrial Science and Technology

Gifu University

Yoshihiro Kubota

Yoshihiro Sugi

Takaaki Hanaoka

Yohei Kurata

Yoichi Nishimura

Tadashi Narita

Kazuhiko Takeuchi

Tokio Hagiwara

Takehiko Matsuzaki

Hideaki Hamada

Tatsuya Eto

Puspa Ratu

Provided is a catalyst composition for the isomerization of n-paraffin which comprises a &#x3b2;-zeolite having been synthesized according to a dry gel process and contains cerium, the &#x3b2;-zeolite being characterized in that it has an average particle diameter of 0.01&#x2dc;0.1 &#x3bc;m and the proportion of the cerium in the &#x3b2;-zeolite is within the range of 0.001&#x2dc;0.2 in terms of the atomic ratio of the silicon atom in the &#x3b2;-zeolite to the cerium atom, i.e. [Ce]/[Si] as well as a process for isomerizing n-paraffin which comprises bringing n-paraffin into contact with the catalyst composition as set forth above.

Catalyst composition for the isomerization of n-paraffin and a process for isomerizing n-paraffin

A process is provided for preparing zeolite, particularly &lsqb;Al&rsqb;-SSZ-31, which comprises the steps of providing a mixture of a zeolite source, an aluminum-containing material, an organic structure directing substance, preferably at least one selected from the group consisting of N,N&prime;-bis-triethyl-1,6-hexanediyl-diammonium dihydroxide, N,N&prime;-bis-triethyl-1,7-heptanediyl-diammonium dihydroxide, N,N&prime;-bis-triethyl-1,8-octanediyl-diammonium dihydroxide, N,N&prime;-bis-triethyl-1,9-nonanediyl-diammonium dihydroxide, N,N&prime;-bis-triethyl-1,10-decanediyl-diammonium dihydroxide, and their salts, and water; drying said mixture to form a powdered dry gel; and contacting and reacting said dry gel with steam at a saturated vapor pressure to produce an aluminum-containing zeolite &lsqb;Al&rsqb;-SSZ-31.

Preparation of zeolite

There is disclosed a method for producing aromatic polyamides represented by the following formula (III), which comprises reacting an aromatic dihalogen compound represented by the following formula (I) with a diamine compound represented by the following formula (II) in the presence of cobalt/phosphine complex and a basic substance under carbon monoxide atmosphere:

Method for synthesizing aromatic polymers

Growing community of inventors

Kokubunji, Japan

Yoshihiro Kubota