Nippon Zeon Company, Ltd.

Zeon Corporation

Keizo Ukita

Masaaki Inoue

Yuko Onodera

Shinji Hirota

An Anti-gelling agent for a hydrocarbon mixture containing a conjugated diene, which comprises (a) at least one compound selected from the group consisting of compounds having an NO radical in the molecule, and precursor compounds capable of forming an NO radical, (b) a phosphorus-containing compound, and (c) at least one compound selected from the group consisting of heterocyclic aldehydes, aromatic aldehydes and condensates of these aldehydes. Clogging in an apparatus for separating and refining a hydrocarbon mixture containing a conjugated diene can be prevented by adding the anti-gelling agent in the apparatus.

Antigelling agent for hydrocarbon mixture containing conjugated diene and method of preventing clogging of apparatus for separating and purifying the mixture

Polymerization-inhibiting composition, polymerization inhibitor and method for inhibiting polymerization

There is provided a water absorbent comprising a magnetic material and a highly water-absorbable resin. Said water absorbent is contacted with a moisture-containing powder and the water absorbent that has absorbed the moisture is then separated from the powder by means of a magnet, whereby the moisture content of the moisture-containing powder can be decreased. Said water absorbent is produced by forming a mixture composed of the highly water-absorbable resin, water and the magnetic material and then drying said mixture.

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Okayama, Japan

Keizo Ukita