IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0298774
(1972-10-18)
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발명자
/ 주소 |
- Baudouin Yvonne (Palaiseau FR) Simonet Guy (Paris FR) Eluard Robert (Paris FR) Pivard Claude (Paris FR)
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출원인 / 주소 |
- L\Air Liquide, Societe Anonyme pour l\Etude et l\Exploitation des Procedes Georges Claude (Paris FR 03)
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인용정보 |
피인용 횟수 :
9 인용 특허 :
0 |
초록
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An improved method of fractionation of a gaseous mixture by adsorption, in which the efficiency of extraction and the content of the desired constituent in the gaseous fraction extracted are increased, the method utilizing two or more adsorption lines, each including at least one adsorber comprising
An improved method of fractionation of a gaseous mixture by adsorption, in which the efficiency of extraction and the content of the desired constituent in the gaseous fraction extracted are increased, the method utilizing two or more adsorption lines, each including at least one adsorber comprising an adsorbent mass which preferentially adsorbs at least one constituent of the gaseous mixture, the first adsorption line comprising: A CONSTANT-PRESSURE EXTRACTION STAGE, DURING WHICH THE GASEOUS MIXTURE IS INTRODUCED INTO THE INLET OF SAID LINE, CIRCULATES FROM THE INLET TO THE OUTLET OF AT LEAST ONE ADSORBER IN SAID LINE IN THE ADSORPTION DIRECTION, AT A HIGH PRESSURE IN SAID ADSORBER, SO AS TO OBTAIN AT THE OUTLET OF SAID LINE A GASEOUS FRACTION IMPOVERISHED IN AT LEAST ONE CONSTITUENT OF SAID GASEOUS MIXTURE; A REGENERATION STAGE COMPRISING A PERIOD OF FALLING PRESSURE, DURING WHICH THE OUTLET OF THE ADSORPTION LINE IS CLOSED AND THERE IS EXTRACTED AT THE INLET OF SAID LINE A GASEOUS FRACTION ENRICHED IN AT LEAST ONE CONSTITUENT OF SAID GASEOUS MIXTURE, WHILE REDUCING THE PRESSURE IN THE ADSORBER TO A LOW PRESSURE FOR SAID ADSORBER; AND A PRESSURE-INCREASE STAGE, DURING WHICH THE PRESSURE IN SAID ADSORBER IS INCREASED TO THE HIGH PRESSURE FOR SAID ADSORBER. The invention is applicable to any process of fractionation by adsorption and in particular to the purification of hydrogen from a steam re-forming unit.
대표청구항
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A method of fractionation of a gaseous mixture by adsorption, utilizing at least one adsorption line including in an adsorption direction at least a first adsorber and a second adsorber, each adsorber comprising at least one adsorbent mass which preferentially adsorbs at least one constituent of sai
A method of fractionation of a gaseous mixture by adsorption, utilizing at least one adsorption line including in an adsorption direction at least a first adsorber and a second adsorber, each adsorber comprising at least one adsorbent mass which preferentially adsorbs at least one constituent of said gaseous mixture, said method comprising at least one adsorption cycle carried out with at least one adsorption line, said adsorption cycle comprising successively: 1. in a constant-pressure extraction stage, introducing said gaseous mixture successively into the inlet of said adsorption line in which it circulates in said first adsorber in the adsorption direction under a first pressure and then is expanded between said first adsorber and said second adsorber down to a second lower pressure and then circulates in said second adsorber still in the adsorption direction under said second pressure, and withdrawing a gaseous fraction impoverished in at least said one constituent from the outlet of said adsorption line, under a constant pressure, 2. in a stage of pressure reduction during which the outlet of said adsorption line is closed and the inlet of said second adsorber is in fluid communication with the outlet of said first adsorber, withdrawing from the inlet of said adsorption line, countercurrently to the adsorption direction, at least one gaseous fraction enriched in at least said one constituent, while reducing the pressure in said first and second adsorbers down to a low pressure lower than said second pressure, 3. in a pressure-increase stage, increasing the pressure existing in said first adsorber and said second adsorber from said low pressure up to the first pressure and up to the second pressure respectively. A method of fractionation of a gaseous mixture by adsorption, utilizing at least two adsorption lines, each line including at least one adsorber comprising at least one adsorbent mass which preferentially adsorbs at least one constituent of the gaseous mixture, said method comprising at least one adsorption cycle carried out with at least one adsorption line, said adsorption cycle comprising successively: 1. in a constant-pressure extraction stage, introducing said gaseous mixture into the inlet of said adsorption line, under a high pressure, in an adsorption direction, and withdrawing a gaseous fraction impoverished in at least said one constituent from the outlet of said adsorption line, in said adsorption direction, under a constant pressure, 2. in a regeneration stage comprising: 2.1. in a balancing period, withdrawing at least a gaseous fraction from the outlet of said adsorber, in said adsorption direction, while reducing at least the pressure existing in said adsorber from a pressure at most equal to the high pressure down to an intermediate pressure, 2.2. in a period of pressure reduction during which the outlet of said adsorption line is closed, withdrawing from the inlet of said adsorption line, countercurrently to the adsorption direction, at least one gaseous fraction enriched in at least said one constituent, while reducing at least the pressure existing in said adsorber, from said intermediate pressure down to a low pressure, 3. in a pressure-increase stage including successively: 3.1. in another balancing period carried out during at least part of the balancing period of the regeneration stage of the other adsorption line, introducing into at least the inlet of said adsorber, in the adsorption direction, a gaseous fraction withdrawn also in said adsorption direction from at least the outlet of a corresponding other adsorber in said adsorption direction of the other adsorption line, while increasing at least the pressure in said adsorber up to another intermediate pressure, 3.2. in a front-rise period, introducing a gaseous fraction impoverished in at least said one constituent into at least the outlet of said adsorber, countercurrently to the adsorption direction, while increasing at least the pressure existing in said adsorber from said another intermediate pressuRe up to a final pressure lower than said high pressure, 3.3. in an inflation period, introducing said gaseous mixture into at least the inlet of said adsorber, in the adsorption direction, while increasing at least the pressure existing in said adsorber from said final pressure, up to a pressure at most equal to said high pressure, each adsorption line comprising, in the direction of adsorption, at least one first adsorber and one second adsorber, said another balancing period of the pressure-increase stage comprising: in a first balancing period, placing the inlet of the first adsorber into communication with the outlet of the corresponding other first adsorber of the other adsorption line, in a second balancing period, placing the inlet of the second adsorber into communication with the outlet of the corresponding other second adsorber of the other adsorption line.
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