Tokuyama Corporation

Kikuo Yamamoto

Masayuki Moriwaki

Shunsuke Hosaka

Yasutaka Komatsu

Akihiro Saito

Tadahiro Fukuju

Dai Tsunoda

Jun Kawakami

Yukihiro Kanechika

Teruhiko Nawata

Naoya Okada

Akimasa Kuramoto

Mou Ou

Saiko Fujii

Kunio Kamata

Kazuhiko Kanawa

To provide an aluminum nitride particle having a hexagonal columnar barrel part and bowl-like projection parts at both ends of the columnar part, wherein the long diameter (D) of the barrel part is 10 to 250 &#x3bc;m, the ratio (L/D) of the distance (L) between the apexes of the two projection pars to the long diameter (D) of the barrel part is 0.7 to 1.3, and the percentage of the length or thickness (L) of the barrel part to the distance (L) between the apexes of the two projection parts is 10 to 60%. The aluminum nitride particle can provide high heat conductivity and excellent electric insulation to a resin when it is filled into the resin.

Nitride aluminum particle

A method of producing a chlorinated hydrocarbon having 3 carbon atoms, comprising a conversion step for converting a chloropropane represented by the following formula (1) into a chloropropane represented by the following formula (2) by reacting it with chlorine in the presence of anhydrous aluminum chloride.CCl&#x2014;CClH&#x2014;CClH&#x2003;&#x2003;(1)(In the above formula (1), m is 1 or 2, and n is an integer of 0 to 3.)CCl&#x2014;CClH&#x2014;CClH&#x2003;&#x2003;(2)(In the above formula (2), m and n are the same integers as in the formula (1), respectively.)

Method of producing a chlorinated hydrocarbon having 3 carbon atoms

A process of making a chlorinated hydrocarbon through a thermal dehydrochlorination step in which an unsaturated compound represented by the following general formula (2) is obtained by thermally decomposing a saturated compound represented by the following general formula (1).CCl&#x2014;CClH&#x2014;CClH&#x2003;&#x2003;(1)CCl&#x2550;CClH&#x2014;CClH&#x2003;&#x2003;(2)(in the above formulas, m is 1 or 2, and n is an integer of 0 to 3.)

Process of making a chlorinated hydrocarbon

A process of making a chlorinated hydrocarbon through a thermal dehydrochlorination step in which an unsaturated compound represented by the following general formula (2) is obtained by thermally decomposing a saturated compound represented by the following general formula (1).CCl&#x2014;CClH&#x2014;CClH&#x2003;&#x2003;(1)CCl&#x2550;CClH&#x2014;CClH&#x2003;&#x2003;(2)(in the above formulas, m is 1 or 2, and n is an integer of 0 to 3.).

A scale adhesion preventing agent for use in a polymerization reactor, consisting essentially of a condensate of a phenol represented by the following formula (1), a 1-naphthol and an aldehyde, which is soluble in an alkaline aqueous solution:wherein Rand Rare the same or different and each a hydroxyl group, alkyl group having 1 to 8 carbon atoms, halogen atom, hydrogen atom, alkoxycarbonyl group whose alkyl moiety has 1 to 8 carbon atoms or phenyl group, with the proviso that a hydrogen atom is existent at at least two of ortho-positions and para-positions with respect to the hydroxyl group. When a vinyl-based monomer is to be polymerized using a polymerization reactor having a film of this scale adhesion preventing agent on the inner wall, the vinyl-based polymer can be produced by preventing the adhesion of a scale.

Scale deposit inhibitor, process for its production, polymerizer whose inside wall is covered with the inhibitor, and process for production of vinylic polymers by the use of the polymerizer

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Shunan, Japan

Kikuo Yamamoto