Seitetsu Kagaku Co., Ltd.

Sumitomo Seika Chemicals Co., Ltd.

Bergwerksverband Gmbh

Kanji Ueda

Kazuo Haruna

Masahiro Inoue

Masaru Uno

Hitosi Someda

Shigeji Obayashi

Yoshinori Takata

Thoru Okabe

Shinichi Kaji

Yoshinori Yoshida

Tadaichi Shibahara

Haruhiko Iwatsubo

A method for continuously treating a gas using an apparatus with a catalyst bed housed therein comprises the steps of passing a subject gas through the catalyst bed to adsorb the adsorbable substances in the subject gas thereto; and passing a regenerating gas through the catalyst bed adsorbed by the adsorbable substances in the subject gas to react and decompose them and simultaneously regenerate the catalyst bed. A particular apparatus is used with this method. By carrying out this method of the present invention using the gas treating apparatus, it is possible to continuously, efficiently and economically advantageously treat a gas containing a malodorous component, harmful component, organic solvent, hydrocarbon vapor or the like.

Method for treating gas and regenerating catalyst portion by portion

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

A process for producing a high purity oxygen from air by PSA which comprises connecting a first adsorption unit packed with carbon molecular sieve and a second adsorption unit packed with zeolite molecular sieve in series, conducting PSA operation separately in each of the units during the same operation cycle time, accumulating the desorption gas from the first adsorption unit in a receiver and then introducing the resulting desorption gas to the second unit as a raw material gas and to the first unit as a rinse gas.

Process for producing high purity oxygen gas from air

A process for separating a specific component from air which comprises alternately and repeatedly carrying out a step of feeding air under pressure to a non-porous gas separation membrane and suctioning of a permeating gas under vacuum after feeding of air is stopped.

Process for separating gas

A process for recovering an oxygen enriched gas from a mixed gas mainly composed of nitrogen gas and oxygen gas by means of PSA comprising:

Process for recovering oxygen enriched gas

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

Catalyst for removing nitrogen oxides, whose activity is lowered by poisoning with sulfur oxides, is contacted with an ammonia gas at a temperature of 200.degree. to 500.degree. C, whereby the sulfur oxides are liberated from the catalyst, and the catalyst is regenerated. Concentration of the ammonia gas to be used in the regeneration treatment must be at least 1% by volume and preferably 5 to 50% by volume of ammonia is used in a mixture with other inert diluting gas. The regenerated catalyst is given an activity as high as that before the poisoning without bringing about any damage and cracking to the catalyst.

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Ashiya, Japan

Kanji Ueda