# US 2021/0276893 A1 · Device and method for the electrodeionization of a liquid > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0276893 A1 - Document ID: US20210276893A1 - Status: Published application - Kind: A1 - Application number: 16/326,636 - Filed: 2016-08-23 - Published: 2021-09-09 - Earliest claimed: 2016-08-23 - Assignees: Swan Analytishce Instrumente AG - Applicants: Swan Analytishce Instrumente AG - Inventors: HEINRICH MAURER; ACHILLES PFLEGHART; JULIA GATH - Web page: https://patentgrep.com/patent/US20210276893A1 ## CPC - C02F 1/4695: {electrodeionisation} - B01D 61/461: {comprising only a single cell, only one anion or cation exchange membrane or one pair of anion and cation membranes} - B01D 61/462: {comprising the membrane sequence AA, where A is an anion exchange membrane} - B01D 61/464: {comprising the membrane sequence CC} - B01D 61/48: having one or more compartments filled with ion-exchange material {, e.g. electrodeionisation} - B01D 61/50: Stacks of the plate-and-frame type - B01D 61/52: Accessories; Auxiliary operation - B01D 61/54: Controlling or regulating - 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 1/008: {Control or steering systems not provided for elsewhere in subclass C02F} - C02F 1/20: by degassing, i.e. liberation of dissolved gases (degasification of liquids in general B01D19/00; arrangement of degassing apparatus in boiler feed supply F22D) - C02F 1/42: by ion-exchange (ion-exchange in general B01J) - G01N 27/06: of a liquid (involving electrolysis G01N27/26) - B01D 2311/2649: Filtration - B01D 2311/2653: Degassing - B01D 2313/365: Electrical sources - B01D 2313/901: Integrated prefilter - C02F 2103/023: {Water in cooling circuits} - C02F 2201/46135: Voltage - C02F 2201/4614: Current - C02F 2201/46145: Fluid flow - C02F 2209/02: Temperature - C02F 2209/05: Conductivity or salinity - C02F 2209/40: Liquid flow rate - G01M 3/16: using electric detection means ({G01M3/045,} G01M3/06, G01M3/12, G01M3/20, G01M3/24, G01M3/26 take precedence) - 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) - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) - G01M: TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR ## Abstract A device for the electrodeionization of a sample liquid. The device has an anode chamber having two openings and an anode, a cathode chamber having two openings and a cathode, and a treatment chamber, that is arranged between the anode chamber and the cathode chamber and has two openings and ion exchanger. The anode chamber and the cathode chamber are separated from the treatment chamber in each case by a permselective membrane and an energy source is operatively connected to the anode and the cathode. In addition, a method for the electrodeionization of a sample liquid is provided. ## Claims ### Claim 1 A device (1) for electrodeionization of a sample liquid comprising: an anode chamber (10) comprising two openings (11, 12) and an anode (13); a cathode chamber (20) comprising two openings (21, 22) and a cathode (23); a treatment chamber (30) located between the anode chamber (10) and the cathode chamber (20) comprising two openings (31, 32) and ion exchanger, wherein the anode chamber (10) and the cathode chamber (20) are in each case separated from the treatment chamber (30) by a permselective membrane (33); and an energy source (40) operatively connected to the anode (13) and the cathode (23); wherein one of the openings (31; 32) of the treatment chamber (30), the openings (21, 22) of the cathode chamber (20) and one of the openings (11; 12) of the anode chamber (10) are connected to each other such that the treatment chamber (30) is operatively connected to the cathode chamber (20) and the cathode chamber (20) is operatively connected to the anode chamber (10). ### Claim 2 A device (1) for electrodeionization of a sample liquid comprising: an anode chamber (10) comprising two openings (11, 12) and an anode (13); a cathode chamber (20) comprising two openings (21, 22) and a cathode (23); a treatment chamber (30) located between the anode chamber (10) and the cathode chamber (20) comprising two openings (31, 32) and ion exchanger, wherein the anode chamber (10) and the cathode chamber (20) are in each case separated from the treatment chamber (30) by a permselective membrane (33); and an energy source (40) operatively connected to the anode (13) and the cathode (23); wherein one of the openings (31; 32) of the treatment chamber (30), the openings (11, 12) of the anode chamber (10) and one of the openings (21; 22) of the cathode chamber (20) are connected to each other such that the treatment chamber (30) is operatively connected to the anode chamber (10) and the anode chamber (10) is operatively connected to the cathode chamber (20). ### Claim 3 (depends on 1) Device (1) according to claim 1, wherein the one opening (31; 32) of the treatment chamber (30), the openings (11, 12) of the anode chamber (10) and the one opening (21; 22) of the cathode chamber (20) are connected to each other in such a way that the supplied sample liquid in the treatment chamber (30) is guided substantially in the direction of gravity and is guided in the anode chamber (10) and the cathode chamber (20) substantially against the direction of gravity. ### Claim 4 (depends on 1) Device (1) according to claim 1, wherein a conductivity sensor (51) is arranged in front of the unconnected openings (31; 32) of the treatment chamber (30). ### Claim 5 (depends on 2) Device (1) according to claim 2, wherein a conductivity sensor (52) is arranged between the treatment chamber (30) and the anode chamber (10). ### Claim 6 (depends on 5) Device (1) according to claim 5, comprising a degassing unit (41) arranged after the conductivity sensor (52), wherein a further conductivity sensor (53) is arranged after the degassing unit (41). ### Claim 7 (depends on 4) Device (1) according to claim 4, wherein at least one of the conductivity sensors (51; 52; 53) comprises a temperature sensor. ### Claim 8 (depends on 1) Device (1) according to claim 1, comprising at least one flow sensor arranged in front of at least one of the following: one of the openings (31; 32) of the treatment chamber (30); one of the openings (11; 12) of the anode chamber (10); one of the openings (21; 22) of the cathode chamber (20). ### Claim 9 (depends on 2) Device (1) according to claim 2, wherein the ion exchanger is a cation exchange resin. ### Claim 10 (depends on 1) Device (1) according to claim 1, wherein the ion exchanger is a color-indicating ion exchanger, in particular a color-indicating cation exchange resin. ### Claim 11 (depends on 1) Device (1) according to claim 1, wherein the treatment chamber (30) is formed at least partially transparent, in particular along the openings (31, 32) of the treatment chamber (30). ### Claim 12 (depends on 11) Device (1) according to claim 11, comprising an optical sensor for monitoring the ion exchanger. ### Claim 13 (depends on 4) Device (1) according to claim 4, comprising an electronic measuring system, which records and processes at least one of the following: signal from at least one of the conductivity sensors; signal from at least one of the temperature sensors; signal from at least one of the flow sensors; signal from at least the optical sensor; a voltage of the power source (40); a current of the power source (40). ### Claim 14 (depends on 1) Device (1) according to claim 1, wherein at least one of the openings (31, 32) of the treatment chamber (30) comprises a filter unit. ### Claim 15 (depends on 1) Device (1) according to claim 1, comprising at least one ion-conducting membrane, arranged in at least one of the following: anode chamber (10) between the anode (13) and the permselective membrane (33) facing the anode (13); cathode chamber (20) between the cathode (23) and the permselective membrane (33) facing the cathode (23). ### Claim 16 (depends on 1) Device (1) according to claim 1, wherein the treatment chamber (30) is exchangeable. ### Claim 17 (depends on 1) Treatment chamber (30) for use in a device (1) according to claim 1, having a substantially cuboid base structure and comprising two mutually spaced apart openings (31, 32) and two mutually opposite side surfaces, each substantially formed by a permselective membrane (33). ### Claim 18 (depends on 17) Treatment chamber (30) according to claim 17, wherein the mutually opposite side surfaces each comprise a substantially rectangular frame forming part of the basic structure on which a permselective membrane (33) is adhesively applied. ### Claim 19 (depends on 17) Treatment chamber (30) according to claim 17, wherein a further opening for filling ion exchanger and/or a further opening for degassing is provided adjacent one of the openings (31; 32), wherein preferably at least one of the further openings is closable in a water-tight and gas-tight manner. ### Claim 20 (depends on 17) Treatment chamber (30) according to claim 17, wherein at least one of the openings is covered by a filter unit. ### Claim 21 (depends on 17) Treatment chamber (30) according to claim 17, wherein the outer sides of the side surfaces formed substantially by a permselective membrane (33) each are provided with detachably fixed protective elements, in particular with rigid plates. ### Claim 22 Method for the electrodeionization of a sample liquid, comprising the steps of: applying a voltage to an anode (13) and cathode (23) spatially separated from each other by two permselective membranes (33a, 33b); the at least partial flow of the sample liquid through a treatment chamber (30) which is at least partially filled with ion exchangers and is bounded by the two permselective membranes (33a, 33b); then the at least partial flow of the sample liquid through an anode chamber (10), which is arranged between the anode (13) and one of the permselective membranes (33a); then the at least partial flow of the sample liquid through a cathode chamber (20), which is arranged between the cathode (23) and the other permselective membrane (33a). ### Claim 23 Method for the electrodeionization of a sample liquid, comprising the steps of: applying a voltage to an anode (13) and cathode (23) spatially separated from each other by two permselective membranes (33a, 33b); the at least partial flow of the sample liquid through a treatment chamber (30) which is at least partially filled with ion exchangers and is bounded by the two permselective membranes (33a, 33b); then the at least partial flow of the sample liquid through a cathode chamber (20), which is arranged between the cathode (23) and the other permselective membrane (33b); the at least partial flow of the sample liquid through an anode chamber (10), which is arranged between the anode (13) and one of the permselective membranes (33a). ### Claim 24 (depends on 22) Method according to claim 22, wherein the at least partial flow through the treatment chamber (30), which is at least partially filled with ion exchangers, takes place substantially in the direction of gravity; the at least partial flow through the anode chamber (10) takes place against the direction of gravity; and the at least partial flow through the cathode chamber (20) takes place against the direction of gravity. ### Claim 25 (depends on 22) Method according to claim 22, comprising the further step of: measuring the specific conductivity of the sample liquid before the step of the at least partial flow of the sample liquid through the treatment chamber (30) which is at least partially filled with ion exchangers and is bounded by the two permselective membranes (33a, 33b). ### Claim 26 (depends on 22) Method according to claim 22, comprising the further step of: measuring the specific conductivity of the sample liquid after the step of the at least partial flow of the sample liquid through the treatment chamber (30) which is at least partially filled with ion exchangers and is bounded by the two permselective membranes (33a, 33b). ### Claim 27 (depends on 26) Method according to claim 26, comprising the further steps of: degassing of at least a part of the sample liquid; and subsequently additional measurement of specific conductivity after the step of measuring the specific conductivity of the sample liquid. ### Claim 28 (depends on 22) Method according to claim 22, comprising the further step of: integrated, continuous measurement of the sample liquid flow rate.