High pressure filter

Patent metadata

Field	Value
Publication number	US-11433338-B2
Application number	US-201615742670-A
Country	US
Kind code	B2
Filing date	Jul 1, 2016
Priority date	Jul 8, 2015
Publication date	Sep 6, 2022
Grant date	Sep 6, 2022

Abstract

A high pressure filter including first and second housings having complimentary tapered surfaces, a gasket located between the tapered surfaces, a filter element centrally disposed within the housings, and a compression collar fitted over the second housing and threaded onto the first housing is provided. Methods of making and using high pressure filters are also provided.

First claim

What is claimed is:

1. A high pressure filter for filtering a liquid metal or gas, comprising:
a first housing having a male tapered surface on a first end and a fluid fitting on a second end;
a second housing having a female tapered surface on a first end and a fluid fitting on a second end, the female tapered surface of the second housing being tapered complementary to the male tapered surface of the first housing, at least a portion of the exterior surface of the second housing being threaded;
a sintered powder porous filter element having a pore size of from about 0.1 to about 5 microns inserted into the first housing and centrally disposed within the first and second housings;
a gasket located between the male tapered surface of the first housing and the female tapered surface of the second housing; and
a compression collar fitted over the first housing and threaded onto the second housing.

2. The high pressure filter of claim 1 , wherein the first housing, the second housing, the compression collar or a combination thereof comprise molybdenum.

3. The high pressure filter of claim 1 , wherein the first and second housings comprise stainless steel or nickel.

4. The high pressure filter of claim 1 , wherein the compression collar comprises stainless steel or nickel.

5. The high pressure filter of claim 1 , wherein the gasket comprises tantalum.

6. The high pressure filter of claim 1 , wherein the gasket comprises a material selected from the group consisting of titanium, stainless steel, and nickel.

7. The high pressure filter of claim 1 , wherein the male tapered surface of the first housing is tapered at an angle different from the female tapered surface of the second housing.

8. The high pressure filter of claim 1 , wherein the high pressure filter is leak-proof during operation at temperatures of about 200 to about 400° C.

9. The high pressure filter of claim 1 , wherein the high pressure filter is leak-proof during operation at temperatures of about 250 to about 300° C.

10. The high pressure filter of claim 1 , wherein the high pressure filter is leak-proof during operation at a pressure of up to about 8000 psig.

11. The high pressure filter of claim 1 , wherein the gasket includes a flange.

12. The high pressure filter of claim 1 , wherein the sintered powder porous filter element comprises a material selected from the group consisting of titanium, tungsten, tantalum, molybdenum, niobium, alumina, titanium oxide, titanium nitride, and silicon carbide.

13. The high pressure filter of claim 1 , wherein the fluid fittings are compression fittings.

14. A method of filtering a liquid metal or gas feed, comprising:
providing a high pressure filter comprising:
a first housing having a male tapered surface on a first end and a fluid fitting on a second end;
a second housing having a female tapered surface on a first end and a fluid fitting on a second end, the female tapered surface of the second housing being tapered complimentary to the male tapered surface of the first housing, at least a portion of the exterior surface of the second housing being threaded;
a sintered powder porous filter element having a pore size of from about 0.1 to about 5 microns inserted into the first housing and centrally disposed within the first and second housings;
a gasket located between the male tapered surface of the first housing and the female tapered surface of the second housing; and
a compression collar fitted over the first housing and threaded onto the second housing;

introducing a feed containing contaminants into the high pressure filter, the feed travelling through a flowpath from the fluid fitting of the second housing, through the filter element, and to the fluid fitting of the first housing, the contaminants remaining within the filter element; and
recovering the feed, purified from contaminants, from the high pressure filter.

15. The method of claim 14 , wherein the feed is a liquid metal.

16. The method of claim 14 , wherein the feed is a gas.

17. The method of claim 14 , wherein the first and second housings comprise molybdenum and the gasket comprises tantalum.

18. The method of claim 14 , wherein the first and second housings comprise a material selected from the group consisting of alumina, silicon carbide, stainless steel, and nickel and the gasket comprises a material selected from the group consisting of titanium, stainless steel, and nickel.

19. A method of making a high pressure filter for filter a liquid metal or gas, comprising:
heating the first housing with the male tapered surface of the high pressure filter of claim 1 ;
fitting the filter element having a pore size of from about 0.1 to about 5 microns into the first housing;
placing the gasket over the male tapered surface of the first housing;

placing the second housing with the complementary female tapered surface in sealing contact with the gasket and the first housing; and
threading the compression collar over the first housing and onto at least a portion of the second housing, providing a leak-proof seal between the first and second housings.

20. A high pressure filter for filtering a liquid metal or gas, comprising:
a first housing having a female tapered surface on a first end and a fluid fitting on a second end;
a second housing having a male tapered surface on a first end and a fluid fitting on a second end, the male tapered surface of the second housing being tapered complementary to the female tapered surface of the first housing, at least a portion of the exterior surface of the second housing being threaded;
a sintered powder porous filter element having a pore size of from about 0.1 to about 5 microns inserted into the first housing and centrally disposed within the first and second housings;
a gasket located between the female tapered surface of the first housing and the male tapered surface of the second housing; and
a compression collar fitted over the first housing and threaded onto the second housing.

21. The high pressure filter of claim 1 , wherein the sintered powder porous filter element comprises a hollow portion into which the liquid metal or gas flows.

22. The high pressure filter of claim 20 , wherein the sintered powder porous filter element comprises a hollow portion into which the liquid metal or gas flows.

Assignees

• Entegris Inc

Inventors

• Randolph Marshall

Classifications

• F02M55/004

  Joints; Sealings · CPC title

• B01D46/0001

  Making filtering elements · CPC title

• F02M55/005

  for high pressure conduits, e.g. connected to pump outlet or to injector inlet · CPC title

• B01D25/00 Primary

  Filters formed by clamping together several filtering elements or parts of such elements (disc filters B01D29/39) · CPC title

• C22B9/023

  By filtering (filtration of aluminium C22B21/066) · CPC title