Membrane assembly with a bonding layer

Patent metadata

Field	Value
Publication number	US-10751667-B2
Application number	US-201616064606-A
Country	US
Kind code	B2
Filing date	Dec 19, 2016
Priority date	Dec 21, 2015
Publication date	Aug 25, 2020
Grant date	Aug 25, 2020

Abstract

A membrane assembly for the permeative separation of a fluid from fluid mixtures includes a porous, fluid-permeable, metallic support substrate, a membrane that is disposed on the support substrate and is selectively permeable to the fluid to be separated off, and a connecting part which is formed, at least on the surface, of a fluid-tight, metallic material. The support substrate is cohesively bonded along a peripheral section thereof to the connecting part. A ceramic, fluid-permeable, porous, first intermediate layer is disposed between the support substrate and the membrane. At least one ceramic bonding layer is disposed directly on the connecting part and the material bond and extends at least over the cohesive material bond and an adjoining section of the connecting part. The first intermediate layer ends on the bonding layer and has a greater average pore size than the bonding layer.

First claim

The invention claimed is:

1. A membrane assembly for the permeative separation of a fluid from a fluid mixture, the membrane assembly comprising
a porous, fluid-permeable, metallic support substrate;
a membrane formed on said support substrate, said membrane being selectively permeable to the fluid to be separated off from the fluid mixture;
a connecting part formed, at least on a surface thereof, of a fluid-tight, metallic material, said support substrate having a peripheral section;
said connecting part being connected with a cohesive material bond to said peripheral section of said support substrate;
a ceramic, fluid-permeable, porous, intermediate layer disposed between said support substrate and said membrane; and
at least one ceramic bonding layer disposed directly on said connecting part and on said cohesive material bond, at least along a partial segment of a total joining length of said material bond, and extending over said cohesive material bond and an adjoining section of said connecting part;
said intermediate layer terminating on or at said bonding layer and said intermediate layer having an average pore size greater than an average pore size of said bonding layer.

2. The membrane assembly according to claim 1 , wherein the average pore size of said bonding layer deviates by at least 0.10 μm from the average pore size of said intermediate layer.

3. The membrane assembly according to claim 1 , wherein one or both of said bonding layer and said intermediate layer is a sintered layer.

4. The membrane assembly according to claim 1 , wherein said bonding layer extends from said material bond directly on said support substrate to over a section of said support substrate adjoining said material bond.

5. The membrane assembly according to claim 1 , wherein said bonding layer extends from said material bond in a direction of said connecting part and in a direction of said support substrate in each case over a length in a range from 0.2 cm inclusive to 3.0 cm inclusive.

6. The membrane assembly according to claim 1 , wherein said bonding layer has a thickness in a range from 1 μm inclusive to 50 μm inclusive.

7. The membrane assembly according to claim 1 , wherein said bonding layer is porous and liquid-permeable.

8. The membrane assembly according to claim 7 , wherein said bonding layer has pores with an average pore size up to 0.50 μm inclusive.

9. The membrane assembly according to claim 1 , wherein an average pore size of said intermediate layer is smaller than an average pore size of said support substrate.

10. The membrane assembly according to claim 1 , wherein said intermediate layer has an average pore size in a range from 0.20 μm inclusive to 2.00 μm inclusive.

11. The membrane assembly according to claim 1 , wherein said intermediate layer is a first intermediate layer and further comprising a ceramic, fluid-permeable, porous, second intermediate layer, said second intermediate layer having an average pore size that is smaller than an average pore size of said first intermediate layer and said second intermediate layer extending between said first intermediate layer and said membrane.

12. The membrane assembly according to claim 11 , wherein said second intermediate layer extends in the direction of said connecting part over said first intermediate layer.

13. The membrane assembly according to claim 11 , wherein said membrane extends in a direction of said connecting part over said bonding layer and at least one of said first or second intermediate layers, and said membrane ends directly on said connecting part.

14. The membrane assembly according to claim 1 , wherein said membrane extends in a direction of said connecting part over said bonding layer and said intermediate layer, and said membrane ends directly on said connecting part.

15. The membrane assembly according to claim 1 , wherein a material of said bonding layer and a material of said intermediate layer are selected from the group consisting of:
zirconium oxide (ZrO 2 ) stabilized with yttrium oxide (Y 2 O 3 ),
zirconium oxide (ZrO 2 ) stabilized with calcium oxide (CaO),
zirconium oxide (ZrO 2 ) stabilized with magnesium oxide (MgO), and
aluminum oxide (Al 2 O 3 ).

16. The membrane assembly according to claim 1 , wherein said bonding layer and said intermediate layer are made of one and the same material.

17. The membrane assembly according to claim 1 , wherein each of said support substrate and said connecting part is tubular.

18. The membrane assembly according to claim 1 , wherein said cohesive material bond is a weld joint.

19. The membrane assembly according to claim 1 , wherein:
said membrane is made of palladium or a palladium-based, metallic material;
at least one of said bonding layer or said intermediate layer is made of zirconium oxide (ZrO 2 ) stabilized with yttrium oxide (Y 2 O 3 ); and
each of said support substrate and said connecting part is made of an iron-based material.

20. A process for producing a membrane assembly for permeatively separating a fluid from a fluid mixture; the process comprising:
providing a porous; fluid-permeable, metallic support substrate and a connecting part formed, at least on a surface thereof of a fluid-tight, metallic material and connected to the support substrate, by way of a cohesive material bond along a peripheral section of the support substrate;
applying at least one ceramic bonding layer directly to the material bond and directly to an adjoining section of the connecting part along at least a subsection of a total joining length of the material bond;
gradually applying:
at least one ceramic, fluid-permeable, porous intermediate layer on the support substrate, with the intermediate layer applied directly to the support substrate ending on or at the bonding layer and having a greater average pore size than the bonding layer; and
a membrane that is selectively permeable to the fluid to be separated from the fluid mixture to the at least one intermediate layer.

Assignees

• Plansee Se

Inventors

• Haydn Markus
• Hummel Stephan
• Brandner Marco

Classifications

• B01D2313/042

  Adhesives or glues · CPC title

• B01D69/1216

  Three or more layers · CPC title

• B01D2313/13

  Specific connectors · CPC title

• B01D53/228

  characterised by specific membranes · CPC title

• B01D65/003 Primary

  Membrane bonding or sealing · CPC title