REFINING SEPARATION PROCEDURE OF OXYGEN FROM AIR

• US 3,594,984 A
• Filed: 12/19/1969
• Issued: 07/27/1971
• Est. Priority Date: 12/20/1968
• Status: Expired due to Term

• Current Assignee: Miki Hiroetu, Nakako Yukio, Nakanishi Sakayuki, Toyama Akira
• Original Assignee: Miki Hiroetu, Nakako Yukio, Nakanishi Sakayuki, Toyama Akira
• Inventors: TOYAMA AKIRA, NAKAKO YUKIO, NAKANISHI SAKAYUKI, MIKI HIROETU
• Application Number:
  US04/886,803
• Time in Patent Office: 585 Days
• US Class Current: 95/126
• CPC Class Codes: B01D 2256/12 Oxygen
• 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 2259/404 using four 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 53/0407 Constructional details of adsorbing systems
• CPC Class Codes: Y02C 20/40 of CO2

Abstract

The air refining separation procedure, comprising, by using both the moisture-carbon dioxide absorbing apparatus consisting of the multiple fixed beds, which have two layers of a moisture absorbing layer and a carbon dioxide absorbing layer, where four processes of absorbing, heating regenerating, and cooling are repeated in turn, and the nitrogen absorbing apparatus consisting of the multiple fixed beds, where two processes of absorbing and regenerating are repeated in turn: (a) supplying the raw air, to obtain the refined air, into the fixed beds, which is in process of adsorption, of the said moisture-carbon dioxide absorbing apparatus; (b) subsequently supplying the refined air, to obtain the oxygen of low purity, into the fixed bed, which is in process of adsorption, of the said nitrogen absorbing apparatus; (c) supplying a part of the product oxygen of low purity into the fixed bed, which is in process of regeneration, of the said moisture-carbon dioxide absorbing apparatus, and subsequently recovering it as the product oxygen of low purity from the air refining separation apparatus; (d) supplying the rest of the oxygen of low purity into the fixed bed, which is in process of cooling, of the said moisture-carbon dioxide absorbing apparatus, where it is cooled and dehydrated, and then joining it with the low purity oxygen flow issued from the nitrogen adsorbing apparatus; and (e) supplying the nitrogen which desorbs from the fixed bed, which is in process of regeneration, of the said nitrogen adsorbing apparatus, after heating, into the fixed bed, which is in process of heating, of the said moisture-carbon dioxide absorbing apparatus, and subsequently discharging it out from the air refining separation apparatus.

Claims