Title:
OZONE ENRICHING METHOD
Document Type and Number:
WIPO Patent Application WO/1996/024554
Kind Code:
A1
Abstract:
An ozone enriching method which comprises passing a plurality of adsorption columns packed with an adsorbent having the capability of preferentially adsorbing ozone through successively the step of holding the adsorbent at a low temperature to adsorb ozone, the step of heating the adsorbent to desorb ozone and introducing a given amount of a scavenging gas into the adsorption column to discharge the desorbed ozone entrained by the scavenging gas, and the step of cooling the adsorbent after the completion of the desorption to the temperature for the adsorption step, thereby enriching ozone. Heating of the adsorbent in the desorption step is conducted under predetermined temperature rise conditions depending upon the time taken from the initiation of the desorption or the concentration of ozone in the gas to be discharged. A gas having a predetermined pressure is used as the scavening gas in the desorption step. The adsorption step is conducted in two stages, a pre-adsorption step and a main adsorption step. A low-temperature oxygen is used as a cold source in the cooling step and, after use, fed as a starting material for ozone into an ozonizer.
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Inventors:
SANUI HIROSHI (JP)
TAKAHASHI NOBUHIKO (JP)
YAMAMOTO SHIGEYUKI (JP)
TAKAHASHI NOBUHIKO (JP)
YAMAMOTO SHIGEYUKI (JP)
Application Number:
PCT/JP1996/000228
Publication Date:
August 15, 1996
Filing Date:
February 05, 1996
Export Citation:
Assignee:
NIPPON OXYGEN CO LTD (JP)
SANUI HIROSHI (JP)
TAKAHASHI NOBUHIKO (JP)
YAMAMOTO SHIGEYUKI (JP)
SANUI HIROSHI (JP)
TAKAHASHI NOBUHIKO (JP)
YAMAMOTO SHIGEYUKI (JP)
International Classes:
B01D53/04; C01B13/10; (IPC1-7): C01B13/10; B01D53/04
Foreign References:
| JPS50116389A | 1975-09-11 | |||
| JPS5364690A | 1978-06-09 | |||
| JPS5598397A | 1980-07-26 | |||
| JPS52134874A | 1977-11-11 | |||
| JPH0429712A | 1992-01-31 | |||
| JPS52115998A | 1977-09-28 |
Other References:
See also references of EP 0757970A4
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