Hollow fibre membrane

Patent metadata

Field	Value
Publication number	US-9067180-B2
Application number	US-201113582949-A
Country	US
Kind code	B2
Filing date	Mar 4, 2011
Priority date	Mar 5, 2010
Publication date	Jun 30, 2015
Grant date	Jun 30, 2015

Abstract

The present invention relates to a process for manufacturing a hollow fibre membrane having a supporting layer and a separating layer, said process comprising:
(a) extruding a spinning composition comprising a first polymer and a solvent for the first polymer through an inner annular orifice of a hollow-fibre die; (b) co-extruding a composition comprising an organic nucleophilic reagent and a mixtures of a solvent and a non-solvent for the first polymer, wherein the composition is either extruded through a central annular orifice of the hollow-fibre die or through an outer annular orifice of a hollow-fibre die; and (c) passing the hollow-fibre through a coagulation bath.
The hollow fibre membrane according to the present invention can be used in gas separation processes, vapour separation processes and liquid filtration processes.

First claim

The invention claimed is:

1. A process for manufacturing a hollow fibre membrane having a supporting layer and a separating layer, said process comprising:
(a) extruding a spinning composition comprising a first polymer and a solvent for the first polymer through an inner annular orifice of a hollow-fibre die;
(b) co-extruding a composition comprising an organic nucleophilic reagent and a mixture of a solvent and a non-solvent for the first polymer, wherein the composition is either extruded through a central annular orifice of the hollow-fibre die or through an outer annular orifice of a hollow-fibre die; and
(c) passing the hollow-fibre through a coagulation bath, wherein:
(1) the first polymer is a hydrophobic polymer; and
(2) the organic nucleophilic reagent is selected from the group consisting of ethylene diamine, diethylene triamine, triethylene tetramine, tetraethylene pentamine, pentaethylene hexamine and polvethyleneimines; and

wherein the organic nucleophilic reagent crosslinks the first polymer.

2. The process according to claim 1 , wherein the hollow-fibre die is a double-orifice spinneret, a triple-orifice spinneret or a quadruple-orifice spinneret.

3. The process according to claim 1 , wherein the hydrophobic polymer is a thermoplastic hydrophobic polymer.

4. The process according to claim 3 , wherein the hydrophobic polymer is a polyethersulfone, a polyamidoimide, a polyimide or a polyether imide.

5. The process according to claim 4 , wherein the hydrophobic polymer is a polyimide or a polyether imide.

6. The process according to claim 5 , wherein the polyimide or the polyetherimide comprises ester groups.

7. The process according to claim 1 , wherein the polyethyleneimine may be linear or branched and has the general formula (1):

wherein p+q is 8 to 5800 and p=8-2900. and q=0-2900.

8. The process according to claim 1 , wherein the polyethyleneimine is branched, wherein in the polyethyleneimine the ratio of primary amino groups : secondary amino groups : tertiary amino groups is about 1 : 2 : 1.

9. The process according to claim 1 , wherein the solvent for the first polymer comprises a polar aprotic solvent.

10. The process according to claim 1 , wherein the non-solvent for the first polymer comprises a protic solvent.

11. A hollow fibre membrane obtainable by the process according to claim 1 .

12. The hollow fibre membrane according to claim 11 , wherein the separating layer is chemically adjoined to the supporting layer.

13. A method of gas separation, vapor separation and/or liquid filtration, comprising passing a gas, vapor, and/or liquid through the hollow fibre membrane according to claim 11 .

Assignees

• Wessling Matthias
• Stamatialis Dimitrios
• Kopec Karina Katarzyna
• Dutczak Szymon Maria
• Stichting Tech Wetenschapp
• Univ Twente

Inventors

• Wessling Matthias
• Stamatialis Dimitrios
• Kopec Karina Katarzyna
• Dutczak Szymon Maria

Classifications

• D01D5/24

  with a hollow structure; Spinnerette packs therefor (D01D5/38 takes precedence; producing tubes of plastic material B29D; addition of agents forming hollow filaments D01F1/08) · CPC title

• B01D69/088 Primary

  Co-extrusion; Co-spinning · CPC title

• B01D71/60

  Polyamines · CPC title

• B01D69/125 Primary

  In situ manufacturing by polymerisation, polycondensation, cross-linking or chemical reaction · CPC title

• B01D69/12

  Composite membranes; Ultra-thin membranes · CPC title