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US4647380A
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US
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Annular dual membrane permselective device and method
Assignee: Individual
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Filing: 1984-12-12
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Granted: 1987-03-03
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Expires: 2004-12-12
Abstract
Abstract A permselective assembly for the selective transport of a species of interest across a semipermeable ion, exchange barrier and a method of operating the same are disclosed. The assembly includes an inner tube of a permselective material disposed within the inner volume of an outer tube of a permselective material forming an annular channel therebetween. This annular dual tube arrangement decreased the hold up volume of the outer tube and increases efficiency of transport of the species of interest.
Inventors
- 👤 Purnendu K. Dasgupta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:29
CPC Classifications
B; B01; B01D; B01D15/00; B01D15/08; B01D15/26; B01D15/36; B01D15/361; B01D15/363; B01D15/362; B01J; B01J47/00; B01J47/12; B01J49/00; B01J49/20
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
78 words
A permselective assembly comprising: (a) an outer tube comprised of a permselective material; (b) an inner tube defining a central channel comprised of a permselective material concentrically disposed within said outer tube forming an annular gap and an annular channel therebetween; and (c) an external jacket comprised of a substantially nonpermeable material enclosing at least an intermediate length of said outer tube and defining an outer channel therebetween, said jacket having a fluid inlet and a fluid outlet.
Claim 2
Dependent Claim
78 words
A permselective assembly comprising: (a) an outer tube comprised of a permselective material; (b) an inner tube defining a central channel comprised of a permselective material concentrically disposed within said outer tube forming an annular gap and an annular channel therebetween; and (c) an external jacket comprised of a substantially nonpermeable material enclosing at least an intermediate length of said outer tube and defining an outer channel therebetween, said jacket having a fluid inlet and a fluid outlet.
Claim 3
Dependent Claim
18 words
An assembly according to claim 1 wherein said outer and inner tubes are of a substantially linear configuration.
Claim 4
Dependent Claim
16 words
An assembly according to claim 1 wherein said inner and outer tubes have a helical configuration.
Claim 5
Dependent Claim
16 words
An assembly according to claim 3 wherein said helical configuration is maintained by a structural support.
Claim 6
Dependent Claim
27 words
An assembly according to claim 4 wherein a filament having a diameter substantially smaller than the diameter of said central channel is disposed within said inner tube.
Claim 7
Dependent Claim
15 words
An assembly according to claim 1 wherein said annular gap is less than 1 millimeter.
Claim 8
Dependent Claim
33 words
An assembly according to claim 1 wherein said permselective material of one of said tubes comprises an anion exchange membrane and said permselective material of said other tube comprises a cation exchange membrane.
Claim 9
Dependent Claim
17 words
An assembly according to claim 1 wherein said permselective material of both tubes are cation exchange membranes.
Claim 10
Dependent Claim
17 words
An assembly according to claim 1 wherein said permselective material of both tubes are anion exchange membranes.
Claim 11
Dependent Claim
15 words
An assembly according to claim 1 further comprising means for radially compressing said annular channel.
Claim 12
Dependent Claim
15 words
An assembly according to claim 1 further comprising means for radially expanding said annular channel.
Claim 13
Dependent Claim
58 words
A method for operating a permselective assembly comprising the steps of: (a) providing a permselective assembly as defined in claim 1; (b) passing a first solution through said central channel of said assembly; (c) passing a second solution through the annular channel of said assembly; and (d) passing a third solution through the outer channel of said assembly.
Claim 14
Dependent Claim
19 words
A method according to claim 12 wherein said annular gap of said annular channel is less than one millimeter.
Claim 15
Dependent Claim
13 words
A method according to claim 12 wherein said annular channel is substantially linear.
Claim 16
Dependent Claim
15 words
A method according to claim 12 wherein said annular channel has a substantially helical configuration.
Claim 17
Dependent Claim
16 words
A method according to claim 15 wherein said helical configuration is maintained by a structural support.
Claim 18
Dependent Claim
30 words
A method according to claim 16 wherein said structural support comprises a filament having a diameter substantially smaller than the diameter of said central channel disposed within said central channel.
Claim 19
Dependent Claim
33 words
A method according to claim 12 wherein said permselective material of one of said tubes comprises an anion exchange membrane and the permselective material of the other tube comprises a cation exchange membrane.
Claim 20
Dependent Claim
17 words
A method according to claim 12 wherein said permselective material of both tubes are cation ion-exchange membranes.
Claim 21
Dependent Claim
17 words
A method according to claim 12 wherein said permselective material of both tubes are anion exchange membranes.
Claim 22
Dependent Claim
37 words
A method according to claim 12 wherein: (a) said first solution comprises a first regenerant solution; (b) said second solution contains at least one substance of interest; and (c) said third solution comprises a second regenerant solution.
Claim 23
Dependent Claim
15 words
A method according to claim 21 wherein said first regenerant solution contains polyvalent aromatic ions.
Claim 24
Dependent Claim
14 words
A method according to claim 21 wherein said first regenerant solution contains polymeric electrolytes.
Claim 25
Dependent Claim
15 words
A method according to claim 21 wherein said second regenerant solution contains polyvalent aromatic ions.
Claim 26
Dependent Claim
14 words
A method according to claim 21 wherein said second regenerant solution contains polymeric electrolytes.
Claim 27
Dependent Claim
29 words
A method according to claim 21 further comprising applying pressure to at least one of said first solution or said third solution sufficient to radially compress said annular channel.
Claim 28
Dependent Claim
36 words
A method according to claim 12 wherein: (a) said first solution contains a first substance of interest; (b) said second solution comprises a regenerant solution; and (c) said third solution contains a second substance of interest.
Claim 29
Dependent Claim
14 words
A method according to claim 27 wherein said regenerant solution contains polyvalent aromatic ions.
Claim 30
Dependent Claim
13 words
A method according to claim 27 wherein said regenerant solution contains polymeric electrolytes.
Claim 31
Dependent Claim
21 words
A method according to claim 27 further comprising applying pressure to said second solution sufficient to radially expand said annular channel.
Claim 32
Dependent Claim
15 words
A method according to claim 12 wherein said first and third solutions are the same.
Claim 33
Dependent Claim
17 words
A method according to claim 31 wherein said outer channel and said central channel are serially connected.
References Cited (Backward Citations)
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