Seitetsu Kagaku Co., Ltd.

Sumitomo Chemical Company, Limited

Nippon Steel Corporation

Sumitomo Seika Chemicals Co., Ltd.

Masaru Uno

Kanji Ueda

Makoto Kurimoto

Kazuo Haruna

Masahiro Inoue

Masakatsu Hiraoka

Akira Yamaguchi

Satoshi Ihara

Shinichi Kaji

Takeo Tanabe

Kenji Matsuzaki

Kiyoshi Hashimoto

Tadayoshi Aono

Norio Sekikawa

Matsuki Yamano

Fumio Arai

Takumi Kono

An improved process for recovery of CO.sub.2 gas in a raw material mixed gas by a PSA apparatus. The process is characterized in that the removal of water in the raw material mixed gas is carried out by cooling the raw material mixed gas and passing it through a rotary dehumidification apparatus to remove water in the raw material mixed gas, and the regeneration of the rotary dehumidification apparatus is carried out by using as a gas for regeneration unadsorbed gas discharged from an adsorption step in the PSA apparatus with heating.

Process for removal of water in raw material mixed gas

The present invention relates to a process for separating and recovering a high purity carbonic acid gas from a wet mixed gas containing carbonic acid gas which comprises using a pressure swing adsorption and separation apparatus composed of an adsorber packed with alumina gel and zeolite and carrying out the steps of adsorption, washing, desorption and pressurization.

Process for separating and recovering carbonic acid gas from gas mixture

Process for separation of high purity gas from mixed gas

Carbon dioxide can be obtained in high recovery with high purity from a gas mixture containing 10% or more of carbon dioxide by a pressure-swing adsorption method wherein moisture in the gas mixture is removed with cooling and heating prior to the adsorption of the carbon dioxide on an adsorbent.

Process for adsorbing and separating carbon dioxide from gas mixture

An oxygen-enriched gas having an oxygen concentration of, for example, 93% by volume, is produced at a high oxygen recovery rate from a gas mixture containing oxygen and nitrogen as main gas components by pressure swing adsorption, using a set of three adsorption columns, each packed with a zeolite molecular sieve as an adsorbent through a cyclic operation of adsorption under a pressure of from atmospheric pressure to 5,000 mm H.sub.2 O and desorption under vacuum pressure down to the final pressure of 150 mm Hg abs.

Process for producing oxygen-enriched gas

A process for separating and recovering carbonic acid gas from a methane-rich gas containing the same by a pressure swing means comprising contacting the methane-rich gas with an adsorbent for carbonic acid gas at a high pressure to obtain a refined methane gas and then desorbing the carbonic acid from the carbonic acid gas-adsorbed adsorbent at a low pressure to obtain a substantially pure carbonic acid gas.

Process for separating carbonic acid gas from methane-rich gas

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Hyogo, Japan

Masaru Uno