US3862032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion exchange waste water treatment process
Assignee: Combustion Engineering Inc
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Filing: 1973-04-17
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Granted: 1975-01-21
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Expires: 1993-04-17
Abstract
Abstract The waste water from the regeneration system of a demineralizer system is treated by ion exchange and filtration so that the water can be immediately reused in subsequent steps of the regeneration process. This reduces the amount of waste requiring further treatment before being released to the environment. The resin used to treat the water can either be exhausted resin from a demineralizer unit or regenerated resin. Some of the acid from the regeneration process may also be recovered for reuse.
Inventors
- 👤 Donn Lewis Dixson
- 👤 Bernard Anthony Roche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:16
CPC Classifications
B; B01; B01J; B01J47/00; B01J47/02; B01J47/04
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
296 words
IN AN ION EXCHANGER TREATMENT PROCESS WHEREIN WATER IS SUBJECTED TO TREATMENT BY MIXED ANION AND CATION EXCHANGE RESINS IN AN ION EXCHANGE SYSTEM, WHEREIN SAID ANION AND CATION EXCHANGE RESINS ARE SUBJECTED TO A REGENERATION PROCESS IN A REGENERATION SYSTEM AND WHEREIN SAID REGENERATION PROCESS INCLUDE THE STEPS OF: A. TRANSPORTING EXHAUSTED ANION AND CATION EXCHANGE RESINS WITH WATER FROM SAID ION EXCHANGE SYSTEM TO SAID REGENERATION SYSTEM, B. SEPARATING SAID ANION AND SAID CATION EXCHANGE RESINS WITH WATER, C. TRANSFERRING SAAID SEPARATED ANION EXCHANGE RESINS WITH WATER TO A POSITION AWAY FROM SAID CATION EXCHANGE RESINS, D. BACKWASHING BOTH SAID ANION AND SAID CATION EXCHANGE RESINS, E. REGENERATING SAID CATION EXCHANGE RESINS WITH ACID F. FLUSHING RESIDUAL ACID FROM SAID CATION EXCHANGE RESINS WITH WATER, G. RINISING SAID CATION EXCHANGE RESINS WITH WATER, H. TRANSFERRING SAID CATION EXCHANGE RESINS TO A MIXING STATION WITH WATER, I. REGENERATING SAID ANION EXCHANGE RESINS WITH CAUSTIC, J. FLUSHING RESIDUAL CAUSTIC FROM SAID ANION EXCHANGE RESINS WITH WATER, K. RINISING SAID ANION EXCHANGE RESINS WITH WATER, L. TRANSFERRING SAID ANION EXCHANGE RESINS TO SAID MIXING STATION WITH WATER, AND M. MIXING SAID ANION AND SAID EXCHANGE CATIONS RESIN AT SAID MIXING STATIONS THE PROCESS OF TREATING AND RECOVERING WASTE WATER FROM SAID REGENERATION PROCESS IN A WASTE PROCESSING SYSTEM INCLUDING THE STEPS OF: AA. STORING WATER FROM STEPS (H) AND (1) FOR REUSE IN SAID REGENERATION PROCESS, BB. FILTERING WATER FROM STEPS (A), (B), (C) AND (D) AND STORING SAID FILTERED WATER FOR REUSE IN SAID REGENERATION PROCESS, CC. PROVIDING ION EXCHANGE RESINS IN SAID WASTE PROCESSING SYSTEM, AND DD. CONTACTING WATER FROM STEPS (G) AND (K) WITH SAID PROVIDED ION EXCHANGE RESINS TO REMOVE DISSOLVED SOLIDS AND STORING SAID CONTACTED WATER FOR REUSE IN SAID REGENERATION PROCESS.
Claim 2
Dependent Claim
296 words
IN AN ION EXCHANGER TREATMENT PROCESS WHEREIN WATER IS SUBJECTED TO TREATMENT BY MIXED ANION AND CATION EXCHANGE RESINS IN AN ION EXCHANGE SYSTEM, WHEREIN SAID ANION AND CATION EXCHANGE RESINS ARE SUBJECTED TO A REGENERATION PROCESS IN A REGENERATION SYSTEM AND WHEREIN SAID REGENERATION PROCESS INCLUDE THE STEPS OF: A. TRANSPORTING EXHAUSTED ANION AND CATION EXCHANGE RESINS WITH WATER FROM SAID ION EXCHANGE SYSTEM TO SAID REGENERATION SYSTEM, B. SEPARATING SAID ANION AND SAID CATION EXCHANGE RESINS WITH WATER, C. TRANSFERRING SAAID SEPARATED ANION EXCHANGE RESINS WITH WATER TO A POSITION AWAY FROM SAID CATION EXCHANGE RESINS, D. BACKWASHING BOTH SAID ANION AND SAID CATION EXCHANGE RESINS, E. REGENERATING SAID CATION EXCHANGE RESINS WITH ACID F. FLUSHING RESIDUAL ACID FROM SAID CATION EXCHANGE RESINS WITH WATER, G. RINISING SAID CATION EXCHANGE RESINS WITH WATER, H. TRANSFERRING SAID CATION EXCHANGE RESINS TO A MIXING STATION WITH WATER, I. REGENERATING SAID ANION EXCHANGE RESINS WITH CAUSTIC, J. FLUSHING RESIDUAL CAUSTIC FROM SAID ANION EXCHANGE RESINS WITH WATER, K. RINISING SAID ANION EXCHANGE RESINS WITH WATER, L. TRANSFERRING SAID ANION EXCHANGE RESINS TO SAID MIXING STATION WITH WATER, AND M. MIXING SAID ANION AND SAID EXCHANGE CATIONS RESIN AT SAID MIXING STATIONS THE PROCESS OF TREATING AND RECOVERING WASTE WATER FROM SAID REGENERATION PROCESS IN A WASTE PROCESSING SYSTEM INCLUDING THE STEPS OF: AA. STORING WATER FROM STEPS (H) AND (1) FOR REUSE IN SAID REGENERATION PROCESS, BB. FILTERING WATER FROM STEPS (A), (B), (C) AND (D) AND STORING SAID FILTERED WATER FOR REUSE IN SAID REGENERATION PROCESS, CC. PROVIDING ION EXCHANGE RESINS IN SAID WASTE PROCESSING SYSTEM, AND DD. CONTACTING WATER FROM STEPS (G) AND (K) WITH SAID PROVIDED ION EXCHANGE RESINS TO REMOVE DISSOLVED SOLIDS AND STORING SAID CONTACTED WATER FOR REUSE IN SAID REGENERATION PROCESS.
Claim 3
Dependent Claim
42 words
A process as recited in claim 1 and further including the step of transferring ion exchange resins from said waste processing system to said regeneration system for regeneration together with said exhausted anion and cation exchange resins from said ion exchange system.
Claim 4
Dependent Claim
27 words
A process as recited in claim 1 wherein said step (cc) of providing ion exchange resins comprises the step of providing mixed anion and cation exchange resins.
Claim 5
Dependent Claim
41 words
A process as recited in claim 3 wherein the step of providing mixed anion and cation exchange resins includes the step of transporting exhausted anion and cation exchange resins with water from said ion exchange system to said waste processing system.
Claim 6
Dependent Claim
40 words
A method as recited in claim 3 wherein the step of providing mixed anion and cation exchange resins includes the step of transporting regenerated resins with water from said mixing station in said regeneration system to said waste processing system.
Claim 7
Dependent Claim
36 words
A process as recited in claim 1 and further including the step of recovering acid from said regeneration process comprising the step of collecting said flushed residual acid from step (f) for reuse in step (e).
Claim 8
Dependent Claim
28 words
A process as recited in claim 6 wherein said step (e) of regenerating said cation exchange resins includes treating said cation exchange resins with said collected residual acid.
Claim 9
Dependent Claim
37 words
A process as recited in claim 1 wherein said water used for steps (a), (b), (c), (d), (e), (g), (h), (i), (k) and (l) is at least partially said stored water from steps (aa), (bb) and (dd).
Claim 10
Dependent Claim
208 words
In an ion exchange treatment process wherein water is subjected to treatment by ion exchange resins in an ion exchange system, wherein said ion exchange resins are subjected to a regeneration process in a regeneration system and wherein said regeneration process includes the steps of: a. transporting exhausted ion exchange resins with water from said ion exchange system to said regeneration system, b. draining water from said ion exchange system, c. backwashing said ion exchange resins, d. regenerating said ion exchange resins with a regenerating solution, e. flushing said regenerating solution from said ion exchange resins, f. rinsing said ion exchange resins with water; and g. transferring said ion exchange resins to a storage station with water; the process of treating and recovering waste water from said regeneration process in a waste processing system including the steps of: aa. storing water from step (g) for reuse in said regeneration process, bb. filtering water from steps (a), (b) and (c) and storing said filter water for reuse in said regeneration process, cc. providing ion exchange resin in said waste processing system, and dd. contacting water from step (f) with said provided ion exchange resin to remove dissolved solids and storing said treated water for reuse in said regeneration process.
Claim 11
Dependent Claim
208 words
In an ion exchange treatment process wherein water is subjected to treatment by ion exchange resins in an ion exchange system, wherein said ion exchange resins are subjected to a regeneration process in a regeneration system and wherein said regeneration process includes the steps of: a. transporting exhausted ion exchange resins with water from said ion exchange system to said regeneration system, b. draining water from said ion exchange system, c. backwashing said ion exchange resins, d. regenerating said ion exchange resins with a regenerating solution, e. flushing said regenerating solution from said ion exchange resins, f. rinsing said ion exchange resins with water; and g. transferring said ion exchange resins to a storage station with water; the process of treating and recovering waste water from said regeneration process in a waste processing system including the steps of: aa. storing water from step (g) for reuse in said regeneration process, bb. filtering water from steps (a), (b) and (c) and storing said filter water for reuse in said regeneration process, cc. providing ion exchange resin in said waste processing system, and dd. contacting water from step (f) with said provided ion exchange resin to remove dissolved solids and storing said treated water for reuse in said regeneration process.
Claim 12
Dependent Claim
40 words
A process as recited in claim 9 and further including the step of transferring ion exchange resins from said waste processing system to said regeneration system for regeneration together with said exhausted ion exchange resins from said ion exchange system.
Claim 13
Dependent Claim
37 words
A process as recited in claim 9 wherein the step (cc) of providing ion exchange resins includes the step of transporting exhausted ion exchange resins with water from said ion exchange system to said waste processing system.
Claim 14
Dependent Claim
40 words
A method as recited in claim 9 wherein the step (cc) of providing ion exchange resins includes the steps of transporting regeneration ion exchange resins with water from said storage station in said regeneration system to said waste processing system.
Claim 15
Dependent Claim
37 words
A process as recited in claim 9 and further including the step of recovering regenerating solution from said regeneration process comprising the steps of collecting said flushed regenerating solution from step (e) for reuse in step (d).
Claim 16
Dependent Claim
34 words
A process as recited in claim 13 wherein said step (d) of regenerating said ion exchange resins includes treating said ion exchange resins includes treating said ion exchange resins with said collected regenerating solution.
Claim 17
Dependent Claim
31 words
A process as recited in claim 9 wherein the said water used for steps (c), (f) and (g) is at least partially said stored water from steps (aa), (bb) and (dd).
Claim 18
Dependent Claim
78 words
In an ion exchange treatment process wherein water is subjected to treatment by ion exchange resins in an ion exchange system and wherein said ion exchange resins are subjected to a regeneration process which produces waste water containing dissolved solids and suspended solids, the steps of treating said waste water in a waste processing system so as to remove said dissolved and suspended solids from said waste water and reusing said treated waste water in said regeneration process.
Claim 19
Dependent Claim
78 words
In an ion exchange treatment process wherein water is subjected to treatment by ion exchange resins in an ion exchange system and wherein said ion exchange resins are subjected to a regeneration process which produces waste water containing dissolved solids and suspended solids, the steps of treating said waste water in a waste processing system so as to remove said dissolved and suspended solids from said waste water and reusing said treated waste water in said regeneration process.
Claim 20
Dependent Claim
28 words
A process as recited in claim 16 wherein said step of treating includes the steps of removing suspended solids by filtration and removing dissolved solids by ion exchange.
Claim 21
Dependent Claim
55 words
A process as recited in claim 17 wherein said step of removing dissolved solids by ion exchange comprises the steps of: a. transferring exhausted ion exchange resins with water from said ion exchange system to said waste processing system and b. contacting said waste water containing dissolved solids with said transferred exhausted ion exchange resins.
Claim 22
Dependent Claim
126 words
In an ion exchange treatment process wherein water is subjected to treatment by ion exchange resins, wherein said ion exchange resins are subjected to a regeneration process and wherein said regeneration process includes the steps of: a. regenerating said ion exchange resins with regenerating solution, b. flushing residual regenerating solution from said ion exchange resins with water, and c. rinsing said ion exchange resins with water; the process of treating and recovering waste water from said regeneration process in a waste processing system including the steps of: aa. providing ion exchange resins in said waste processing system, bb. contacting water from step (c) with said provided ion exchange resins to remove dissolved solids therefrom, and cc. storing said contacted water for reuse in said regeneration process.
Claim 23
Dependent Claim
126 words
In an ion exchange treatment process wherein water is subjected to treatment by ion exchange resins, wherein said ion exchange resins are subjected to a regeneration process and wherein said regeneration process includes the steps of: a. regenerating said ion exchange resins with regenerating solution, b. flushing residual regenerating solution from said ion exchange resins with water, and c. rinsing said ion exchange resins with water; the process of treating and recovering waste water from said regeneration process in a waste processing system including the steps of: aa. providing ion exchange resins in said waste processing system, bb. contacting water from step (c) with said provided ion exchange resins to remove dissolved solids therefrom, and cc. storing said contacted water for reuse in said regeneration process.
Claim 24
Dependent Claim
177 words
In an ion exchange treatment process wherein water is subjected to treatment by mixed anion and cation exchange resins, wherein said anion and cation exchange resins are subjected to a regeneration process and wherein said regeneration process includes the steps of: a. separating said anion and said cation resins with water, b. regenerating said cation resins with acid, c. flushing residual acid from said cation resins, d. rinsing said cation resin with water, e. regenerating said anion resins with caustic, f. flushing residual caustic from said anion resins with water, and g. rinsing said anion resins with water; the process of treating and recovering waste water from said regeneration process in a waste process system including the steps of: aa. filtering water from step (a) and storing said filtered water for reuse in said regeneration process, bb. providing ion exchange resins in said waste processing system, and cc. contacting water from steps (d) and (g) with said provided ion exchange resins to remove dissolved solids, and dd. storing said contacted water for reuse in said regeneration process.
Claim 25
Dependent Claim
177 words
In an ion exchange treatment process wherein water is subjected to treatment by mixed anion and cation exchange resins, wherein said anion and cation exchange resins are subjected to a regeneration process and wherein said regeneration process includes the steps of: a. separating said anion and said cation resins with water, b. regenerating said cation resins with acid, c. flushing residual acid from said cation resins, d. rinsing said cation resin with water, e. regenerating said anion resins with caustic, f. flushing residual caustic from said anion resins with water, and g. rinsing said anion resins with water; the process of treating and recovering waste water from said regeneration process in a waste process system including the steps of: aa. filtering water from step (a) and storing said filtered water for reuse in said regeneration process, bb. providing ion exchange resins in said waste processing system, and cc. contacting water from steps (d) and (g) with said provided ion exchange resins to remove dissolved solids, and dd. storing said contacted water for reuse in said regeneration process.
Claim 26
Dependent Claim
19 words
A process as recited in claim 20 wherein said provided ion exchange resins comprise anion and cation exchange resins.
References Cited (Backward Citations)
US3775310A
Cited
US3745114A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |