US3674685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of and apparatus for the ion-exchange treatment of liquids
Assignee: Permutit Co Ltd
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Filing: 1969-08-15
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Granted: 1972-07-04
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Expires: 1989-08-15
Abstract
Abstract In a continuous ion-exchange process in which resin moves intermittently through a circuit including an absorber and a regenerator, the absorber is spanned by a liquid-distributing system, and at each intermittent movement a slug of resin wholly occupying the space in the absorber between this system and one end of the absorber is discharged while service flow continues. The remainder of the bed in the absorber is moved in the direction of the space thus emptied so as to fill it again and a slug of regenerated resin of identical volume is introduced into the other end of the absorber.
Inventors
- 👤 Thomas Victor Arden
- 👤 Albert George Borra
- 👤 Rolf Crowther Clayton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:56
CPC Classifications
B; B01; B01J; B01J47/00; B01J47/10
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
20 words
A process according to claim 1 in which the liquid flow is upwards in both the absorber and the regenerator.
Claim 2
Dependent Claim
69 words
the resin that is returned to the absorber is constituted by a slug of regenerated and rinsed resin which occupies the whole of a space in the regenerator defined by another transverse device through which the resin can pass and by one end of the regenerator, this space holding the same quantity of resin as the space similarly defined in the absorber, and is discharged direct to the absorber;
Claim 3
Dependent Claim
69 words
the resin that is returned to the absorber is constituted by a slug of regenerated and rinsed resin which occupies the whole of a space in the rinser defined by another transverse device through which the resin can pass and by one end of the rinser, this space holding the same quantity of resin as the space similarly defined in the absorber, and is discharged direct to the absorber;
Claim 4
Dependent Claim
19 words
the defined space in the rinser is filled by moving resin in the rinser towards and into that space;
Claim 5
Dependent Claim
19 words
the defined space in the regenerator is filled by moving resin in the regenerator towards and into that space;
Claim 6
Dependent Claim
42 words
A process according to claim 1 in which liquid taken from the supply of liquid to be treated is passed through regenerated resin in the regenerator and fed to service while the bed in the absorber is being moved as a whole.
Claim 7
Dependent Claim
48 words
A process according to claim 1 in which the liquid flow is upwards in the absorber and the downward movement of the bed into the space emptied by the discharge of the slug is effected or accelerated by liquid under pressure introduced into the top of the absorber.
Claim 8
Dependent Claim
35 words
the resin that is removed from the absorber to the regenerator is constituted by the slug of resin in the absorber and is transferred direct from the absorber to the regenerator while service flow continues.
Claim 9
Dependent Claim
35 words
the resin that is removed from the absorber to the regenerator is constituted by the slug of resin in the absorber and is transferred direct from the absorber to the regenerator while service flow continues.
Claim 10
Dependent Claim
30 words
A process according to claim 4 in which the liquid that exerts the pressure on the top of the bed is branched from that flowing to service from the regenerator.
Claim 11
Dependent Claim
45 words
A process according to claim 1 in which the rate of flow of the liquid entering the absorber is increased while the slug of resin is being flushed out, in order to maintain the rate of flow of liquid to service during this flushing step.
Claim 12
Dependent Claim
14 words
A process according to claim 1 employed in the softening or demineralization of water.
Claim 13
Dependent Claim
86 words
An ion-exchange plant suitable for use in a process according to claim 1 and comprising two vessels each spanned by a transverse device at such a distance from an end of the vessel as to define a space holding the same quantity of resin as that similarly defined in the other vessel, the vessels being arranged in a closed circuit constituted solely by the vessels and valve-controlled pipes, each running from one vessel and terminating in another, to allow resin to flow from vessel to vessel.
Claim 14
Dependent Claim
22 words
A plant according to claim 8 in which the spaces defined by the transverse devices are at the bottom of both vessels.
Claim 15
Dependent Claim
127 words
An ion-exchange process in which a bed of ion-exchange resin particles in an absorber is traversed by a liquid while exchange of ions takes place between the resin and the liquid, the liquid flows from the bed to service, and intermittently resin at the liquid-inlet end of the absorber is removed from the bed and moved through a closed circuit that includes a bed of resin in a regenerator in which ions taken up by the resin in the absorber are removed by a regenerant and the regenerated resin, after being rinsed in a rinser to free it from excess regenerant and the products of regeneration, is returned to the liquid-outlet end of the absorber through the circuit, characterized by the features that at each intermittent movement:
Claim 16
Dependent Claim
94 words
An ion-exchange plant suitable for use in a process according to claim 38 and comprising three vessels, namely an absorber, a regenerator and a rinser, each spanned by a transverse device at such a distance from an end of the vessel as to define a space holding the same quantity of resin as that similarly defined in the other vessels, the vessels being arranged in a closed circuit constituted solely by the vessels and valve-controlled pipes, each running from one vessel and terminating in another, to allow resin to flow from vessel to vessel.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |