Asahi Kasei Kogyo Kabushiki Kaisha

Asahi Kasei Chemicals Corporation

Ken Someya

Hideo Midorikawa

Hiroshige Okamoto

Hiroshi Yokoyama

Muneaki Aminaka

Osamu Nagano

Kunitoshi Aoki

Kouji Takeuchi

Hironobu Yamauchi

Hiroshige 206 Grand-Court-Kadotayashiki Okamoto

A method for producing a molded product consisting of a resin polymerized by a melt polycondensation reaction, comprising continuous feeding of a prepolymer in molten state from a prepolymer feeding port to a polymerization reactor, discharging from holes of a porous plate, followed by polymerization while dropping along a supporting substrate under reduced pressure, and molding by transferring to at least one molding machine in molten state without solidification, wherein transfer pressure to said molding machine is controlled so as to maintain at an arbitrary pressure from 0.1 to 100 MPa (absolute pressure).

Method and apparatus for producing molded product

Disclosed is a method for recycling a recovered polycondensation polymer which comprises a process wherein a recovered polycondensation polymer is supplied in a molten state to a polymerizer having a porous plate, and then after ejecting the polycondensation polymer through pores of the porous plate, the polymerization degree of the polycondensation polymer is increased under a reduced pressure or in a reduced inert gas atmosphere while dropping the polycondensation polymer along a supporting body.

Method for recycling recovered polycondensation polymer

A process for producing an alkylene carbonate, which comprises reacting an alkylene oxide with carbon dioxide in the presence of a catalyst in a reactor to obtain a reaction mixture containing an alkylene carbonate, the reactor communicating with a process-side channel of a heat exchanger through a piping to form a circulation circuit, wherein the process is characterized in that it further comprises, during or after the reaction, flowing a process liquid through the circulation circuit including the reactor and the process-side channel of the heat exchanger while flowing a heat exchange medium having a temperature of from 140&#xb0; C. to 200&#xb0; C. through the heat exchange-side channel of the heat exchanger, thereby maintaining the inner temperature of the process-side channel at 135&#xb0; C. to 200&#xb0; C.

Method of manufacturing alkylene carbonate

Process for producing unsaturated nitrile

Disclosed is an ammoxidation catalyst composition for use in producing acrylonitrile from propylene, or methacrylonitrile from isobutene or tert-butanol, by ammoxidation of the propylene or of the isobutene or tert-butanol, comprising an oxide catalyst composition represented by the formula:

Ammoxidation catalyst composition

Ammoxidation catalyst composition, and process for producing

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Kurashiki, Japan

Ken Someya