KR920019908A - Integrated adsorption method for recovering hydrogen and hydrocarbons using a warm swing step prior to the pressurized swing step - Google Patents

Abstract

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Description

Integrated adsorption method for recovering hydrogen and hydrocarbons using a warm swing step prior to the pressurized swing step

Since this is an open matter, no full text was included.

1 illustrates a flowchart using the method of the present invention.

2 illustrates the method of the present invention applied to a hydrogen consumption method.

3 illustrates the process of the present invention as applied to the hydrogen production process.

Claims (8)

a) adsorbing at least some of the heavy hydrocarbons and providing a first adsorption zone having a solid phase adsorbent maintained at a temperature and pressure sufficient to form a first effluent stream comprising hydrogen and light hydrocarbons. Passing a feedstream through, b) adsorbing at least a portion of the light hydrocarbons and removing the first adsorption zone having a solid adsorbent maintained at a temperature and pressure sufficient to form a second effluent stream comprising hydrogen. Passing the first effluent stream through, c) heating at least a portion of the first effluent stream to a temperature sufficient to desorb at least some of the heavy hydrocarbons from the rich adsorbent formed in step a), and the heated portion Is passed through the first adsorption zone to obtain a first desorption effluent stream comprising heavy hydrocarbons and hydrogen. Contacting with at least a portion of the heavy hydrocarbon rich adsorbent formed therein under excessively desorbing conditions; and d) desorbing at least a portion of the light hydrocarbons as the light hydrocarbon rich adsorbent to produce a second desorption effluent comprising light hydrocarbons. Regenerating at least a portion of the light hydrocarbon rich adsorbent formed in step b) by maintaining a reduced pressure at a pressure sufficient to form an integrated adsorption process for separating light hydrocarbons from a light hydrocarbon, hydrogen and heavy hydrocarbon containing feed stream. The method of claim 1 wherein the temperature of the second adsorption zone in step b) is higher than the temperature of the first adsorption zone in step a). 3. The method of claim 1 or 2, further comprising heating the first adsorption effluent stream before passing through the second adsorption zone. 4. A process according to any one of claims 1, 2 or 3 wherein the light hydrocarbon is a hydrocarbon having 1 to 5 carbon atoms per molecule and the heavy hydrocarbon is a hydrocarbon having 6 or more carbon atoms per molecule. 4. A process according to any one of claims 1, 2 or 3 wherein the light hydrocarbons are methane and ethane and the heavy hydrocarbons are propane and octane. a) condensate the liquid condensate stream comprising a portion of hydrocarbons having 6 or more carbon atoms and condensing the effluent stream to a temperature sufficient to form a top vapor stream comprising hydrogen, hydrocarbon fractions having 1 to 5 carbon atoms and hydrocarbon fractions having at least 6 carbon atoms. Cooling, b) a first solid phase adsorbent maintained at a temperature and pressure sufficient to adsorb at least some of the hydrocarbon fractions having at least 6 carbon atoms and to form a first effluent stream comprising hydrogen and hydrocarbon fractions having 1 to 5 carbon atoms. Passing the upper vapor stream through an adsorption zone; c) adsorbing at least a portion of the hydrocarbon fractions having 1 to 5 carbon atoms and maintaining a solid phase adsorbent maintained at a temperature and pressure sufficient to form a second exhaust stream comprising hydrogen; Passing the first effluent stream through a second adsorption zone having D) heating and heating at least a portion of the second effluent to a temperature sufficient to desorb at least some of the hydrocarbons having at least 6 carbon atoms from the rich adsorbent formed in step a), and heating the heated portion to the first adsorption zone. Contacting with at least a portion of the heavy hydrocarbon rich adsorbent formed therein under desorption conditions such that the first stream of desorption effluent comprising at least a portion of the hydrocarbon fractions having at least 6 carbon atoms is passed therethrough, and e) said light hydrocarbon adsorbent. The light hydrocarbon adsorbent formed in step b) above by maintaining at reduced pressure to a pressure sufficient to desorb at least a portion of the hydrocarbon fraction having 1 to 5 carbon atoms to form a second desorption effluent comprising at least a portion of the hydrocarbon having 1 to 5 carbon atoms. Playing at least some of Made, the method for separating the effluent stream from a hydrocarbon conversion process containing hydrogen, hydrocarbons, and carbon number of 6 or more hydrocarbons having 1 to 5 carbon atoms. 7. The method of claim 6, wherein the hydrocarbon fraction of 1 to 5 carbon atoms contains mainly methane, and the hydrocarbon fraction of 6 or more carbon atoms contains mainly benzene. The process according to any one of claims 1 to 6, wherein the ratio of hydrogen to heavy hydrocarbons contained in the stream and passing through the first adsorption zone is from 1: 1 to 10: 1. ※ Note: The disclosure is based on the initial application.