ADSORPTION PROCESS FOR NATURAL GAS PURIFICATION

• US 3,710,547 A
• Filed: 03/11/1971
• Issued: 01/16/1973
• Est. Priority Date: 03/11/1970
• Status: Expired due to Term

• Current Assignee: Warren Leonard Nelson
• Original Assignee: Warren Leonard Nelson
• Inventors: Nelson, Warren Leonard
• Primary Examiner(s): Hart, Charles N.
• Application Number:
  US05/123,301
• Time in Patent Office: 677 Days
• Field of Search: 55/58,62,70,74,75,33,31,68
• US Class Current: 95/99
• CPC Class Codes: B01D 2257/504 Carbon dioxide
• CPC Class Codes: B01D 2257/80 Water
• CPC Class Codes: B01D 2259/4009 using hot gas
• CPC Class Codes: B01D 2259/402 using two beds
• CPC Class Codes: B01D 2259/403 using three beds
• CPC Class Codes: B01D 2259/4146 Contiguous multilayered adsorbents
• CPC Class Codes: B01D 53/04 with stationary adsorbents B01D53/025 takes precedence
• CPC Class Codes: B01D 53/047 Pressure swing adsorption
• CPC Class Codes: Y02C 20/40 of CO2

Abstract

A cyclic process of purification of gases containing at least two undesirable products by adsorption on a bed divided in at least two sections in which the regeneration is realized in a first stage by introducing on the adsorption bed countercurrently to the adsorption direction, after depressurizing, wherein the said gaseous mixture is obtained by combining with a given volume of reactivation gas a stream of gas coming out from between the two sections of the bed, a flow of said mixture equivalent to said volume of reactivation gas being passed through the first adsorption section.

Claims

2. The process of purification according to claim 1, in which the cooling of the adsorption be is effected by:

d. forced circulation, countercourently to the adsorption direction of the gaseous mixture previously cooled, said gaseous mixture being obtained by combining with reactivation gas a stream of gas from between the two sections of the bed; and

e. the adsorption bed is further cooled by reactivation gas alone, possibly consisting in purified gas.

3. The process of purification according to claim 1, in which the first section adsorbs one undesirable product while the second section adsorbs at least the other undesirable product.

4. The process of purification according to claim 2 in which the first section adsorbs one undesirable product while the second section adsorbs at least the other.