Polymers, polymer membranes and methods of producing the same

• US 8,753,426 B2
• Filed: 08/03/2012
• Issued: 06/17/2014
• Est. Priority Date: 08/03/2012
• Status: Expired due to Fees

• Current Assignee: Air Products and Chemicals Incorporated (Linde Plc)
• Original Assignee: Air Products and Chemicals Incorporated (Linde Plc)
• Inventors: Zheng, Shiying, Quay, Jeffrey Raymond
• Primary Examiner(s): Greene, Jason M
• Application Number:
  US13/566,535
• Publication Number:
  US 20140033918A1
• Time in Patent Office: 683 Days
• Field of Search: 95/45, 95/51, 95/52, 95/53, 95/54, 96/4, 96/8, 96/10, 96/13, 96/14, 528/312, 528/322
• US Class Current: 95/51
• CPC Class Codes: B01D 2256/10 Nitrogen
• CPC Class Codes: B01D 2256/12 Oxygen
• CPC Class Codes: B01D 2256/16 Hydrogen
• CPC Class Codes: B01D 2256/18 Noble gases
• CPC Class Codes: B01D 2256/24 Hydrocarbons
• CPC Class Codes: B01D 2256/245 Methane
• CPC Class Codes: B01D 2257/102 Nitrogen
• CPC Class Codes: B01D 2257/304 Hydrogen sulfide
• CPC Class Codes: B01D 2257/406 Ammonia
• CPC Class Codes: B01D 2257/502 Carbon monoxide
• CPC Class Codes: B01D 2257/504 Carbon dioxide
• CPC Class Codes: B01D 2257/7022 Aliphatic hydrocarbons
• CPC Class Codes: B01D 2258/06 Polluted air
• CPC Class Codes: B01D 2323/30 Cross-linking
• CPC Class Codes: B01D 2325/022 Asymmetric membranes
• CPC Class Codes: B01D 2325/34 Molecular weight or degree of polymerisation
• CPC Class Codes: B01D 53/228 characterised by specific membranes
• CPC Class Codes: B01D 67/0083 Thermal after-treatment
• CPC Class Codes: B01D 67/0093 Chemical modification
• CPC Class Codes: B01D 67/00931 by introduction of specific groups after membrane formation, e.g. by grafting
• CPC Class Codes: B01D 69/02 : characterised by their properties
• CPC Class Codes: B01D 69/08 : Hollow fibre membranes manufacture of hollow fibres D01D5/24, D01F1/08
• CPC Class Codes: B01D 71/64 : Polyimides; Polyamide-imides; Polyester-imides; Polyamide acids or similar polyimide precursors
• CPC Class Codes: B01D 71/76 : Macromolecular material not specifically provided for in a single one of groups B01D71/08 - B01D71/74 rubbers in general B01D71/24
• CPC Class Codes: C08G 73/1039 : comprising halogen-containing substituents
• CPC Class Codes: C08G 73/1067 : Wholly aromatic polyimides, i.e. having both tetracarboxylic and diamino moieties aromatically bound
• CPC Class Codes: C08G 73/1085 : Polyimides with diamino moieties or tetracarboxylic segments containing heterocyclic moieties
• CPC Class Codes: C08G 73/18 : Polybenzimidazoles
• CPC Class Codes: C08G 73/22 : Polybenzoxazoles
• CPC Class Codes: Y02C 20/40 : of CO2
• CPC Class Codes: Y02P 20/151 : Reduction of greenhouse gas [GHG] emissions, e.g. CO2

Abstract

The invention describes a polymeric material comprising repeating units of Formulae I-III and methods of preparation. Novel polymeric materials, gas separation membranes and fluid component separation methods are also described.

Claims

1. A polymeric material comprising repeating units of the following Formulae I-III:

2. The polymeric material of claim 1, wherein

Ar₁ is selected from the following structures:

7. A gas separation membrane comprising a polymeric material of claim 1.

8. The membrane of claim 7, which is an asymmetric gas separation membrane.

9. The membrane of claim 7, which is a hollow fiber membrane.

10. A method for separating components of a fluid, said method comprising:

providing a separation device comprising a polymeric material of claim 1 as a separation membrane;

feeding a feed fluid to the separation device, wherein the feed fluid comprises a mixture of a first fluid and at least one second fluid; and

collecting a product from the separation device, wherein the product contains the first fluid at a higher purity than the feed fluid.

11. The method of claim 10, wherein the feed fluid comprises a gas pair selected from the group consisting of O₂/N₂, CO₂/CH₄, CO₂/N₂, H₂/N₂, He/N₂, H₂/CH₄, He/CH₄, He/H₂, H₂/CO₂ and He/CO₂.

12. The polymeric material of claim 1 wherein Ar₁ of the repeating units of Formulae I-III is selected from the following structures:

13. The polymeric material of claim 1 wherein Ar₁ of repeating units of Formulae I-III is selected from the following structures:

14. The polymeric material of claim 1 wherein Ar₁ of repeating units of Formulae I-III is selected from the following structures:

15. The polymeric material of claim 1 wherein:

Ar₁ is selected from the following structures;

16. The polymeric material of claim 1 wherein:

Ar₁ is selected from the following structures;

17. The polymeric material of claim 1 wherein:

Ar₁ is selected from the following structures;

18. The polymeric material of claim 1 wherein:

Ar₁ is selected from the following structures;

19. The polymeric material of claim 18 wherein:

Ar₁ is

3. A method for preparing a polymeric material comprising repeating units of Formulae I-III:

4. The method of claim 3, wherein

Ar₁ is selected from the following structures:

5. The method of claim 3, wherein thermal treatment is carried out at 350°

C. to 500°

C. for 15 minutes to 24 hours under vacuum or an inert atmosphere.

6. The method of claim 3, wherein the aromatic polyimide precursors comprising repeating units of Formula IV have an average molecular weight of 10,000 to 400,000.

20. The method of claim 4 wherein

Ar₁ is