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Yoshio Yoshikawa, Takanari Nawata, Akira Amemiya, Toshio Komatsu, Yoshiaki Inoue, Megumu Yuyama: Oxygen absorbent. Mitsubishi Gas Chemical Company, Frishauf Holtz Goodman & Woodward, March 11, 1980: US04192773 (96 worldwide citation)

An oxygen absorbent comprising (a) metal halide-coated metal powder having at least one metal halide coated on the surface of at least one metal powder, the amount of metal halide coated being in the range of from about 0.001 part to about 10 parts by weight per 100 parts by weight of the metal powd ...


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Yoshio Yoshikawa, Akira Amemiya, Toshio Komatsu, Yoshiaki Inoue, Megumu Yuyama: Oxygen absorbent. Mitsubishi Gas Chemical Company, Flynn & Frishauf, September 12, 1978: US04113652 (34 worldwide citation)

An oxygen absorbent comprising at least one alkaline earth metal sulfite, at least one ferrous compound and free water is disclosed.


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Akitoshi Sugio, Kazuyoshi Taka, Akira Amemiya, Tomotaka Furusawa, Mutsuhiko Takeda, Katsumasa Tanaka, Toshikazu Umemura, Yoshihiro Ono: Process for continuously polymerizing trioxane. Mitsubishi Gas Chemical Co, Wenderoth Lind & Ponack, August 10, 1982: US04343929 (21 worldwide citation)

A process for producing a polyacetal homopolymer or copolymer which comprises continuously feeding a liquid starting mixture containing molten trioxane and a catalyst and optionally a comonomer through a feed opening of a reactor, said reactor being a continuously stirring-type mixer having two stir ...


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Yoshio Yoshikawa, Akira Amemiya, Sigeru Kimoto, Hidenori Kimpara: Oxygen absorbent. Mitsubishi Gas Chemical Company, Flynn & Frishauf, August 1, 1978: US04104192 (17 worldwide citation)

An oxygen absorbent comprising a dithionite and at least one compound having water of crystallization or water of hydration is disclosed.


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Akitoshi Sugio, Akira Amemiya, Tadashi Kunii, Tomotaka Furusawa, Mutsuhiko Takeda, Katsumasa Tanaka, Toshikazu Umemura: Process for continuous production of oxymethylene polymer or copolymer. Mitsubishi Gas Chemical Co, Wenderoth Lind & Ponack, July 13, 1982: US04339569 (8 worldwide citation)

In a process for producing an oxymethylene homopolymer or copolymer having improved stability which comprises polymerizing trioxane or a mixture of trioxane and a cyclic ether and/or a cyclic acetal in bulk in the presence of a catalyst which is at least one compound selected from the group consisti ...


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Akira Amemiya, Tadashi Kunii, Tomotaka Furusawa, Mutsuhiko Takeda, Katsumasa Tanaka, Toshikazu Umemura, Yoshihiro Ono, Isamu Masumoto, Noriyasu Nakao, Masanori Furukawa: Process for heat stabilizing oxymethylene copolymers. Mitsubishi Gas Chemical Company, Wenderoth Lind & Ponack, December 28, 1982: US04366305 (6 worldwide citation)

In a process for producing a stabilized oxymethylene copolymer by heat-melting, at a temperature ranging between the melting point of the copolymer and a temperature 100.degree. C. higher than the melting point in a degassing apparatus in the presence of a heat stabilizer, a crude oxymethylene copol ...


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Yoshio Yoshikawa, Sadao Otsuka, Akira Amemiya, Toshio Komatsu: Process for treating a waste liquid of hydrosulfite. Mitsubishi Gas Chemical Company, Brooks Haidt Haffner & Delahunty, June 8, 1976: US03962073 (4 worldwide citation)

A process for treating a waste liquor from a hydrosulfite process by an activated sludge process is improved by aerating the waste in the presence of a metal ion before the activated sludge process.


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Akitoshi Sugio, Akira Amemiya, Tadashi Kunii, Tomotaka Furusawa, Mutsuhiko Takeda, Katsumasa Tanaka, Toshikazu Umemura: Process for stabilizing oxymethylene copolymers. Mitsubishi Gas Chemical Company, Wenderoth Lind & Ponack, November 17, 1981: US04301273 (4 worldwide citation)

In a process for producing a stabilized oxymethylene copolymer which comprises heat-melting an oxymethylene copolymer having unstable, unblocked terminals obtained by the copolymerization of trioxane with a cyclic acetal and/or a cyclic ether to heat decompose it in the presence of available heat st ...