PROCESS FOR EFFECTING ABSORPTION OR REMOVAL OF GAS FROM A LIQUID

• US 3,651,616 A
• Filed: 02/13/1969
• Issued: 03/28/1972
• Est. Priority Date: 02/14/1968
• Status: Expired due to Term

• Current Assignee: Hospal Industrie
• Original Assignee: Alain Blanchard, Alphonse Faure
• Inventors: Faure, Alphonse, Blanchard, Alain
• Primary Examiner(s): Adee, John
• Application Number:
  US04/799,059
• Time in Patent Office: 1,139 Days
• Field of Search: 55/16,55,97,158 210/23,63,221 23/258.5 195/1.8
• US Class Current: 95/46
• CPC Class Codes: A61M 1/1698 Blood oxygenators with or without heat-exchangers intracorporal A61M1/1678; manufacturing of membranes therefor B01D67/00; semi-permeable membranes for separation processes characterised by their properties B01D69/00; semi-permeable membranes characterised by their material B01D71/00
• CPC Class Codes: B01D 69/10 Supported membranes; Membrane supports
• CPC Class Codes: B01D 69/1071 Woven, non-woven or net mesh
• CPC Class Codes: Y10S 435/818 Aeration or oxygen transfer technique

Abstract

Gases, e.g., oxygen, are advantageously absorbed by or removed from aqueous liquids, especially blood, by passage along a partial pressure gradient through a waterproof, porous membrane having pores with an apparent diameter of 0.01 to 3 Mu and a critical surface tension of less than 40 dynes/cm. at 20* C.

Claims

2. Process according to claim 1 in which the aqueous liquid phase is blood.

3. Process according to claim 2 in which the gaseous phase contains oxygen at a partial pressure higher than the partial pressure of the oxygen in the blood.

4. Process according to claim 2 in which the gaseous phase contains carbon dioxide at a partial pressure lower than the partial pressure of the carbon dioxide in the blood.

5. Process according to claim 1 in which the membrane has pores of apparent diameter 0.05 to 1.5 Mu .

6. Process according to claim 1 in which the said membrane is a waterproofed polyacrylonitrile membrane.

7. Process according to claim 1 in which the said membrane is a waterproofed paper sheet with pores having an apparent diameter less than 0.05 Mu .

8. Process according to claim 6 in which the said membrane has been waterproofed with a vulcanized organopolysiloxane elastomer.

9. Process according to claim 7 in which the said membrane has been waterproofed with a vulcanized organopolysiloxane elastomer.

10. Process according to claim 1 in which the said membrane is a polyvinyl chloride membrane.