# US 2014/0196753 A1 · Regeneration of ion exchange resin and recovery of regenerant solution

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2014/0196753 A1
- Document ID: US20140196753A1
- Status: Published application
- Kind: A1
- Application number: 14/046,958
- Filed: 2013-10-05
- Published: 2014-07-17
- Earliest claimed: 2006-07-14
- Assignees: Rayne Dealership Corporation
- Applicants: Rayne Dealership Corporation
- Inventors: H. Martin JESSEN; Eric John DOLE; David MORGAN
- Web page: https://patentgrep.com/patent/US20140196753A1

## CPC

- B01J 49/06: containing cationic exchangers
- B01J 49/53: for cationic exchangers
- C02F 1/5245: {using basic salts, e.g. of aluminium and iron}
- C02F 1/001: {Processes for the treatment of water whereby the filtration technique is of importance (C02F1/44 takes precedence; construction of filters in general B01D24/00 - B01D41/00)}
- C02F 1/5236: {using inorganic agents}
- C02F 1/56: Macromolecular compounds
- C02F 1/66: by neutralisation; pH adjustment (for degassing C02F1/20; using ion-exchange C02F1/42; for flocculation or precipitation of suspended impurities C02F1/52; for removing dissolved compounds C02F1/58)
- C02F 5/10: using organic substances
- C02F 9/00: Multistage treatment of water, waste water or sewage
- C02F 2103/42: from bathing facilities, e.g. swimming pools
- C02F 2201/008: Mobile apparatus and plants, e.g. mounted on a vehicle
- C02F 2209/03: Pressure
- C02F 2209/055: Hardness
- C02F 2209/06: pH
- C02F 2301/046: Recirculation with an external loop
- C02F 2303/16: Regeneration of sorbents, filters
- Y02W 10/37: using solar energy
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes)
- Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT

## Abstract

An apparatus and method for regenerating spent ion exchange resin and recovering regenerant fluid is described. A regeneration system has a regeneration vat, a regeneration solution tank, a regenerant recovery tank, a chemical dispenser, a solids separator, a pH adjuster and a pump. The regeneration vat holds the spent resin and is connected to the regeneration solution tank to allow transfer of regenerant solution into the regeneration vat. Spent regenerant fluid travels to the regenerant recovery tank, where it is treated with chemicals provided from the chemical dispenser. The solids separator receives the treated regenerant liquid and separates precipitate flocs from the treated regenerant liquid. The concentration of chloride ions in the separated regenerant solution can be adjusted by the pH adjuster to form fresh regenerant solution. The pump pumps the fresh regenerant solution to the regenerant solution tank to regenerate additional spent cation exchange resin.

## Claims

### Claim 1

A resin regeneration system comprising:
(a) a regeneration vat for holding spent cation exchange resin;
(b) a regenerant solution tank for holding fresh regenerant solution, the regenerant solution tank is connected to the regeneration vat to allow transfer of the regenerant solution into the regeneration vat to regenerate the spent cation exchange resin to form fresh cation exchange resin and spent regenerant solution;
(c) a regenerant recovery tank comprising (i) a fluid inlet to receive the spent regenerant solution, and (ii) a fluid outlet to release treated regenerant liquid;
(d) a chemical dispenser to dispense a regenerant treatment composition into the spent regenerant solution in the regenerant recovery tank to form a treated regenerant liquid and precipitate flocs;
(e) a solids separator to receive the treated regenerant liquid and separate the precipitate flocs from the treated regenerant liquid to form a separated regenerant solution;
(f) a pH adjuster to adjust the concentration of chloride ions in the separated regenerant solution to form fresh regenerant solution; and
(g) a pump to pump the fresh regenerant solution to the regenerant solution tank to regenerate additional spent cation exchange resin.

### Claim 2 (depends on 1)

A system according to claim 1 comprising a backwash supply tank to hold backwash water to backwash the spent cation exchange resin to form spent backwash water comprising resin fines, and backwash nozzles in the regeneration vat to pass a stream of backwash water upwardly through the spent cation exchange resin.

### Claim 3 (depends on 2)

A system according to claim 2 comprising a particle filter to filter out the resin fines from the spent backwash water.

### Claim 4 (depends on 1)

A system according to claim 1 comprising a water softener or thermal distiller to generate rinse water to rinse the spent cation exchange resin after regeneration.

### Claim 5 (depends on 1)

A system according to claim 1 wherein the chemical dispenser comprises a hopper connected to a liquid channel, the hopper having an inlet to receive the regenerant treatment composition and an outlet to dispense the regenerant treatment composition into a flowing stream of the spent regenerant solution passing through the liquid channel.

### Claim 6 (depends on 1)

A system according to claim 1 wherein the regenerant recovery tank comprises a circulation mixer to mix the spent regenerant solution and dispersed regenerant treatment composition.

### Claim 7 (depends on 1)

A system according to claim 1 wherein the solids separator comprises a filter press.

### Claim 8 (depends on 1)

A system according to claim 1 wherein the solids separator comprises a centrifuge.

### Claim 9 (depends on 1)

A system according to claim 1 wherein the pH adjuster comprises:
(i) a pH-adjuster tank for holding a chloride-containing acid;
(ii) a pH-adjusting tank to hold the separated regenerant solution, the tank comprising an inlet to receive the chloride-containing acid from the pH adjuster tank; and
(iii) a pH-adjuster feed pump to pump the chloride-containing acid from the pH-adjuster tank to the inlet of the pH-adjusting tank.

### Claim 10 (depends on 1)

A system according to claim 1 wherein the regenerant recovery tank comprises a translucent portion.

### Claim 11

A resin regeneration system comprising:
(a) a regeneration vat for holding spent cation exchange resin;
(b) a regenerant solution tank for holding fresh regenerant solution, the regenerant solution tank is connected to the regeneration vat to allow transfer of the regenerant solution into the regeneration vat to regenerate the spent cation exchange resin to form fresh cation exchange resin and spent regenerant solution;
(c) a regenerant recovery tank comprising (i) a fluid inlet to receive the spent regenerant solution, and (ii) a fluid outlet to release treated regenerant liquid;
(d) a chemical dispenser comprising a hopper connected to a liquid channel, the hopper having an inlet to receive the regenerant treatment composition and an outlet to dispense the regenerant treatment composition into a flowing stream of the spent regenerant solution passing through the liquid channel to form a treated regenerant liquid and precipitate flocs;
(e) a solids separator to receive the treated regenerant liquid and separate the precipitate flocs from the treated regenerant liquid to form a separated regenerant solution;
(f) a pH adjuster to adjust the concentration of chloride ions in the separated regenerant solution to form fresh regenerant solution; and
(g) a pump to pump the fresh regenerant solution to the regenerant solution tank to regenerate additional spent cation exchange resin.