Alloy for catalytic membrane reactors

Patent metadata

Field	Value
Publication number	US-10590516-B2
Application number	US-201414313997-A
Country	US
Kind code	B2
Filing date	Jun 24, 2014
Priority date	Jun 24, 2014
Publication date	Mar 17, 2020
Grant date	Mar 17, 2020

Abstract

A vanadium alloy essentially consisting of: vanadium; and aluminium having a content of greater than 0 to 10 at %, and a process of producing thereof.

First claim

The invention claimed is:

1. A process of producing a tube comprising a heat treated vanadium alloy, the process comprising:
forming a vanadium alloy consisting of:
aluminium having a content of greater than 0 to 10 at %; optionally a grain refining element selected from Ti, Cr, Fe, Ni or B having a content of greater than 0 to 5 at %, and the balance vanadium and unavoidable impurities;

heat treating the formed vanadium alloy at temperatures of from 800 to 1500° C. and pressures from 50 to 500 MPa, thereby producing a heat treated vanadium alloy having a ductility of greater than 10% elongation; and
subjecting the heat treated vanadium alloy to a deformation process so as to form the tube comprising the heat treated vanadium alloy and having a wall thickness of 0.05 to 1 mm.

2. The process of producing a tube comprising a heat treated vanadium alloy according to claim 1 , wherein said heat treated vanadium alloy has a ductility greater or equal to 12% elongation.

3. The process of producing a tube comprising a heat treated vanadium alloy according to claim 1 , wherein the heat treatment step comprises a Hot Isostatic Pressing (HIP) process.

4. The process of producing a tube comprising a heat treated vanadium alloy according to claim 1 , wherein the heat treatment step comprises subjecting the vanadium alloy to temperatures of from 1000 to 1400° C.

5. The process of producing a tube comprising a heat treated vanadium alloy according to claim 4 , wherein the heat treatment step comprises subjecting the vanadium alloy to pressures from 50 to 400 MPa.

6. The process of producing a tube comprising a heat treated vanadium alloy according to claim 4 , wherein the heat treatment step is undertaken for a duration of at least 30 min.

7. The process of producing a tube comprising a heat treated vanadium alloy according to claim 4 , wherein at least one of a heating rate or cooling rate of the heat treatment step is at least 4 K/min.

8. A process according to claim 1 , wherein the tube has an outer diameter of between 2 to 25 mm.

9. The process of producing a tube comprising a heat treated vanadium alloy according to claim 1 , wherein said heat treated vanadium alloy has a grain linear intercept of less than 5.0 mm, based upon a minimum sample size of 6 grains.

10. The process of producing a tube comprising a heat treated vanadium alloy according to claim 1 , wherein said heat treated vanadium alloy does not include any voids having an average size of greater than 0.5 mm.

11. A process of producing a tube comprising a heat treated vanadium alloy, the process comprising:
forming a vanadium alloy consisting of:
aluminium having a content of greater than 0 to 10 at %; a grain refining element selected from Ti, Cr, Fe, Ni or B having a content of 0 to 5 at %, and the balance vanadium and unavoidable impurities;

heat treating the formed vanadium alloy at temperatures of from 800 to 1500° C. and pressures from 50 to 500 MPa, thereby producing a heat treated vanadium alloy having a ductility of greater than 10% elongation; and
subjecting the heat treated vanadium alloy to a deformation process so as to form the tube comprising the heat treated vanadium alloy and having a wall thickness of 0.05 to 1 mm.

12. The process of producing a tube comprising a heat treated vanadium alloy according to claim 11 , wherein said heat treated vanadium alloy has a ductility greater or equal to 12% elongation.

13. The process of producing a tube comprising a heat treated vanadium alloy according to claim 11 , wherein the heat treatment step comprises a Hot Isostatic Pressing (HIP) process.

14. The process of producing a tube comprising a heat treated vanadium alloy according to claim 11 , wherein the heat treatment step comprises subjecting the vanadium alloy to temperatures of from 1000 to 1400° C.

15. The process of producing a tube comprising a heat treated vanadium alloy according to claim 14 , wherein the heat treatment step comprises subjecting the vanadium alloy to pressures from 50 to 400 MPa.

16. The process of producing a tube comprising a heat treated vanadium alloy according to claim 14 , wherein the heat treatment step is undertaken for a duration of at least 30 min.

17. The process of producing a tube comprising a heat treated vanadium alloy according to claim 14 , wherein at least one of a heating rate or cooling rate of the heat treatment step is at least 4 K/min.

18. A process according to claim 11 , wherein the tube has an outer diameter of between 2 to 25 mm.

19. The process of producing a tube comprising a heat treated vanadium alloy according to claim 11 , wherein said heat treated vanadium alloy has a grain linear intercept of less than 5.0 mm, based upon a minimum sample size of 6 grains.

20. The process of producing a tube comprising a heat treated vanadium alloy according to claim 11 , wherein said heat treated vanadium alloy does not include any voids having an average size of greater than 0.5 mm.

Assignees

• Commw Scient Ind Res Org

Inventors

• Liang Daniel Dong
• Dolan Michael David

Classifications

• B01D53/228

  characterised by specific membranes · CPC title

• C01B2203/041

  In-situ membrane purification during hydrogen production · CPC title

• B01D2257/502

  Carbon monoxide · CPC title

• Y02C20/20

  of methane · CPC title

• C01B3/503

  characterised by membranes · CPC title