EP4584219A1 - Procédé de production d'une solution aqueuse pure hautement concentrée d'hydrogénocarbonate de magnésium ou d'hydrogénocarbonate de calcium et récipient sous pression pour stocker et/ou doser la solution dans l'eau à optimiser - Google Patents

Procédé de production d'une solution aqueuse pure hautement concentrée d'hydrogénocarbonate de magnésium ou d'hydrogénocarbonate de calcium et récipient sous pression pour stocker et/ou doser la solution dans l'eau à optimiser

Info

Publication number
EP4584219A1
EP4584219A1 EP23768797.5A EP23768797A EP4584219A1 EP 4584219 A1 EP4584219 A1 EP 4584219A1 EP 23768797 A EP23768797 A EP 23768797A EP 4584219 A1 EP4584219 A1 EP 4584219A1
Authority
EP
European Patent Office
Prior art keywords
magnesium
water
calcium
solution
hydrogen carbonate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP23768797.5A
Other languages
German (de)
English (en)
Inventor
Jürgen JOHANN
Andrea Pavan
Christian Schrotshammer
Claudia STOIBERER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BWT Holding GmbH
Original Assignee
BWT Holding GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BWT Holding GmbH filed Critical BWT Holding GmbH
Publication of EP4584219A1 publication Critical patent/EP4584219A1/fr
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F5/00—Compounds of magnesium
    • C01F5/24—Magnesium carbonates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J41/00—Anion exchange; Use of material as anion exchangers; Treatment of material for improving the anion exchange properties
    • B01J41/08—Use of material as anion exchangers; Treatment of material for improving the anion exchange properties
    • B01J41/10—Inorganic material
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F11/00—Compounds of calcium, strontium, or barium
    • C01F11/18—Carbonates
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
    • C02F1/685—Devices for dosing the additives
    • C02F1/687—Devices for dosing solid compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
    • C02F2001/422—Treatment of water, waste water, or sewage by ion-exchange using anionic exchangers
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/02—Non-contaminated water, e.g. for industrial water supply
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C02F2201/005—Valves
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/003—Downstream control, i.e. outlet monitoring, e.g. to check the treating agents, such as halogens or ozone, leaving the process
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/05—Conductivity or salinity
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2307/00—Location of water treatment or water treatment device
    • C02F2307/10—Location of water treatment or water treatment device as part of a potable water dispenser, e.g. for use in homes or offices

Definitions

  • water especially water that is used for drinking or for preparing hot drinks such as coffee, requires the water to have the same composition as possible.
  • Bicarbonates eg NaHCO 3 , KHCO3, which are present as a solid and dissolve easily, are particularly suitable for metering.
  • Magnesium and calcium salts are nutritionally more valuable than sodium salt and potassium salt. It is therefore particularly desirable that the water contains mainly magnesium and calcium as minerals.
  • the hydrogen carbonates of the alkaline earth metals calcium and magnesium do not exist as solids.
  • the hydrogen carbonates of calcium and magnesium are only available in dissolved form. It is not possible to evaporate and concentrate the solution because this process forms calcium or magnesium carbonate, CO2 and H2O from the dissolved calcium or magnesium hydrogen carbonate:
  • the hydrogen carbonates of calcium or magnesium metal can be prepared from two solutions.
  • a solution consists of potassium or
  • the solution obtained in this way is not pure, but also contains undesirable sodium or potassium chloride.
  • An example is the production of a 1% solution, or 10 g/1 of magnesium hydrogen carbonate.
  • Magnesium hydrogen carbonate made from magnesium or calcium carbonate and carbon dioxide.
  • the object of the present invention in contrast, is to produce a magnesium or calcium hydrogen carbonate solution that is as pure as possible, which is stoichiometric and has a fast reaction rate.
  • the object of the invention is already achieved by a method for producing magnesium and calcium hydrogen carbonate, by treated water and by a pressure vessel according to one of the independent claims.
  • the invention relates to a method for producing magnesium and/or calcium hydrogen carbonate.
  • the method is intended to produce a highly concentrated calcium and/or magnesium hydrogen carbonate solution.
  • This preferably has a total hardness of over 200° dH, particularly preferably of over 400° dH, in particular 400°-800° dH.
  • an anion exchanger loaded with hydrogen carbonate ions i.e. bicarbonate ions.
  • the ion exchanger can in particular be designed as a weakly basic, medium basic or strongly basic anion exchanger.
  • a mixture of weakly basic, medium-basic and strongly basic ion exchange material can also be used.
  • Basic ion exchangers can in particular comprise amino groups as a functional group.
  • the ion exchanger can in particular be present as a bed in a cartridge, which comprises an inlet and an outlet for the concentrate to be enriched with magnesium or calcium hydrogen carbonate.
  • a solution containing magnesium and/or calcium salt is passed over the anion exchanger loaded with hydrogen carbonate ions.
  • Chlorides are preferably used as magnesium or calcium salts.
  • Magnesium sulfate can also be used as the magnesium salt.
  • a solution of magnesium chloride and/or calcium chloride is passed over a weak and/or medium and/or strong anion exchanger, which is in the bicarbonate form, with the chloride ion the solution is exchanged for the bicarbonate ion of the anion exchanger.
  • the concentration of the feed solution of magnesium chloride and/or calcium chloride is in the range from 0.05 mol/1 to 0.3 mol/1.
  • the solution can be provided by a single pass through the ion exchanger.
  • the magnesium or calcium hydrogen carbonate solution produced in this way is of high quality and has no impurities.
  • This highly concentrated solution can then be used to enrich water, especially desalinated water, with magnesium and/or calcium hydrogen carbonate. Due to the high concentration, only small amounts are required. In particular, one liter of the solution is sufficient for up to 200 L - 1000 L of water, depending on the concentration.
  • magnesium chloride and/or calcium chloride or magnesium sulfate can be used for the solution containing magnesium and/or calcium salt.
  • a chloride-free and/or sodium-free water can be provided.
  • Chloride or sodium-free means a concentration of less than 1 mmol/1, preferably less than 0.1 mmol/1.
  • a control valve can be controlled based on conductivity.
  • a target value for the conductivity of 50-2000 pS/cm for drinking water and/or preferably 100-300 pS/cm for coffee water can be set.
  • a pressure vessel can be used to easily prevent carbon dioxide from outgassing, which leads to the precipitation of magnesium or calcium carbonates that form. If the pressure vessel is designed as a compensating vessel, the concentrate containing magnesium or calcium hydrogen carbonate can be added to the water to be treated in a simple manner, in particular without using a pump.
  • the compensation vessel can in particular be designed as a membrane compensation vessel.
  • an elastic membrane separates a volume of gas from the concentrate.
  • the pressure vessel can be pressurized via the gas volume throughout its use, in particular until the concentrate is used up.
  • the membrane can be designed, for example, as an intermediate wall or an inserted bladder.
  • the anion exchanger is converted into the hydrogen carbonate form with sodium and/or potassium hydrogen carbonate before the magnesium or calcium salt-containing solution is passed through.
  • the anion exchanger can then be present in the hydrogen carbonate form to at least 30%, preferably 50% - 100%, particularly preferably 80% - 100% of its total capacity (according to DIN 54402:2009-04).
  • the anion exchanger is preferably previously loaded with chloride ions.
  • Chloride ions in particular lead to high selectivity, i.e. rapid exchange to the bicarbonate form. As a result, the chloride ions are almost completely removed from the solution even during the passage.
  • the invention further relates to treated water which was produced using the method described above.
  • the water can in particular be chloride and/or sodium free.
  • the water preferably has a carbonate hardness of 5°dH - 20°dH for use as drinking water and a carbonate hardness of 2°dH - 8°dH for use as coffee water.
  • the invention further relates to a pressure vessel, which is designed in particular as an expansion vessel.
  • the pressure vessel comprises a solution as prepared as described above.
  • the pressure vessel can additionally contain a solution with magnesium chloride and/or magnesium sulfate or magnesium chloride and/or calcium chloride, which is metered separately.
  • the total hardness of the solution can be in particular over 200°dH, in particular between 400° and 800°dH.
  • the pressure in the pressure vessel is preferably 1.5 - 10 bar.
  • the invention further relates to an installation system which includes the pressure vessel.
  • the installation system preferably further comprises a sensor for the electrical conductivity of the water being treated and a valve which is regulated based on the measured conductivity.
  • the concentrate containing calcium and/or magnesium bicarbonate is easily added via the valve; the mineral concentration, i.e. the hardness of the water, can be easily adjusted.
  • the concentrate is produced in particular according to the process described below.
  • a weakly basic, medium basic or strongly basic ion exchanger, or a mixture of weakly and/or medium and/or strongly basic ion exchanger, preferably from the chloride form is converted into the hydrogen carbonate form.
  • the hydrogen carbonate solution can consist, for example, of sodium or potassium hydrogen carbonate.
  • the concentration of the hydrogen carbonate solution can be between 5 and 10 g/1 with sodium hydrogen carbonate.
  • the solution can also be more concentrated, for example 15 - 25 g/1.
  • the starting solution of the ion exchanger therefore predominantly contains Na or KCl.
  • the concentration of the calcium and/or magnesium hydrogen carbonate draining from the ion exchanger can be adjusted via the concentration of the calcium and/or magnesium chloride in the feed.
  • the concentration of the magnesium hydrogen carbonate produced in this way can be almost up to the solubility limit, usually up to 25 g/1 Mg(HCO 3 ) 2 .
  • the anion exchanger is back in the chloride form (R-Cl) and the process can be carried out according to Eq. (6) and Eq. (7) or Eq. (8) must be carried out again.
  • the solution is filled into a pressure vessel.
  • This preferably has 0.5 bar to 10 bar overpressure.
  • the concentrated solution is metered from a pressure vessel.
  • the water can be demineralized using demineralization, such as reverse osmosis, a mixed bed exchanger, or membrane distillation.
  • demineralization such as reverse osmosis, a mixed bed exchanger, or membrane distillation.
  • the solution from the pressure tank can then be metered into the salt-free or almost salt-free demineralization process via an adjustable valve, for example a ball valve, a needle valve, etc., without a metering pump.
  • an adjustable valve for example a ball valve, a needle valve, etc.
  • Fig. 1 shows schematically the loading of the anion exchanger with hydrogen carbonate ions.
  • Fig. 2 shows the production of the concentrate.
  • Fig. 3 shows schematically the use of the concentrate for water treatment.
  • Fig. 4 is a flowchart according to an embodiment of the invention.
  • Fig. 1 shows a schematic view of a cartridge 1 with an anion exchanger.
  • a solution containing sodium hydrogen carbonate is passed over the anion exchanger in chloride form.
  • the ion exchanger is then almost completely converted into the hydrogen carbonate form.
  • magnesium chloride is then passed over the cartridge 1 with the anion exchange material.
  • the pressure vessel 10 is designed as a membrane expansion vessel and includes a membrane 11 which separates the gas volume from the liquid.
  • a solution containing magnesium chloride and/or magnesium sulfate or magnesium chloride and/or calcium chloride can also be added to the pressure vessel via the inlet 14.
  • Fig. 3 shows an installation system
  • the salt-containing concentrate is fed to the drain, while the permeate is almost salt-free and continues to flow via line 3.
  • the pressure vessel 10 with the concentrate is coupled to the line 3 via a valve 4.
  • the valve 4 is controlled via the electrical conductance of the output water measured by the conductivity sensor 5.
  • the water can then be used for a coffee machine 6, in this exemplary embodiment a portafilter machine, to prepare coffee.
  • the control ensures that the coffee prepared always tastes just as good. In particular, once the coffee machine settings (pressure temperature, grinding degree) have been optimized, they do not need to be changed.
  • Fig. 4 is a flowchart of an exemplary embodiment of the method according to the invention.
  • an anion exchanger loaded with chloride is converted into the bicarbonate form by introducing a solution containing sodium bicarbonate.
  • a magnesium chloride solution is then passed over the anion exchanger.
  • the resulting magnesium bicarbonate concentrate is filled into an expansion vessel.
  • a solution containing magnesium chloride and/or magnesium sulfate or magnesium chloride and/or calcium chloride can be metered into the pressure vessel via the inlet 14
  • the expansion tank is pressurized by introducing carbon dioxide.
  • the concentrate is then added in a controlled manner via the conductivity.
  • the water is then used, for example, to make coffee.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Geology (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Hydrology & Water Resources (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Non-Alcoholic Beverages (AREA)
  • Tea And Coffee (AREA)

Abstract

L'invention concerne un procédé de production d'hydrogénocarbonate de magnésium et/ou d'hydrogénocarbonate de calcium, un échangeur d'anions chargé d'ions bicarbonate étant fourni et une solution contenant un sel de magnésium et/ou un sel de calcium étant ensuite passée à travers l'échangeur d'anions.
EP23768797.5A 2022-09-08 2023-09-05 Procédé de production d'une solution aqueuse pure hautement concentrée d'hydrogénocarbonate de magnésium ou d'hydrogénocarbonate de calcium et récipient sous pression pour stocker et/ou doser la solution dans l'eau à optimiser Pending EP4584219A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022122779.0A DE102022122779A1 (de) 2022-09-08 2022-09-08 Verfahren zur Herstellung einer hochkonzentrierten reinen wässrigen Lösung aus Magnesiumhydrogencarbonat bzw. Calciumhydrogencarbonat sowie Druckbehälter zum Speichern und/oder Dosieren der Lösung in das zu optimierende Wasser
PCT/EP2023/074258 WO2024052313A1 (fr) 2022-09-08 2023-09-05 Procédé de production d'une solution aqueuse pure hautement concentrée d'hydrogénocarbonate de magnésium ou d'hydrogénocarbonate de calcium et récipient sous pression pour stocker et/ou doser la solution dans l'eau à optimiser

Publications (1)

Publication Number Publication Date
EP4584219A1 true EP4584219A1 (fr) 2025-07-16

Family

ID=88021050

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23768797.5A Pending EP4584219A1 (fr) 2022-09-08 2023-09-05 Procédé de production d'une solution aqueuse pure hautement concentrée d'hydrogénocarbonate de magnésium ou d'hydrogénocarbonate de calcium et récipient sous pression pour stocker et/ou doser la solution dans l'eau à optimiser

Country Status (4)

Country Link
US (1) US20260022025A1 (fr)
EP (1) EP4584219A1 (fr)
DE (1) DE102022122779A1 (fr)
WO (1) WO2024052313A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3812413A1 (de) * 1988-04-14 1989-10-26 Aquachem Ind Wasserbehandlung Verfahren zur gewinnung von wasser mit karbonathaerte aus kondensat- oder permeatwasser
IL147222A0 (en) * 1999-06-25 2002-08-14 Abiogen Pharma Spa Preparation and metering of components with co2
US11191290B2 (en) * 2013-12-18 2021-12-07 Societe Des Produits Nestle S.A. Process for supplying magnesium and/or calcium enriched water based beverage and associated manufacturing apparatus
US10703656B2 (en) * 2016-05-11 2020-07-07 Pentair Filtration Solutions, Llc Water ionization system and method
EP3711641A1 (fr) * 2019-03-21 2020-09-23 Riprup Company S.A. Procédé de préparation d'eau pour infusion de café

Also Published As

Publication number Publication date
US20260022025A1 (en) 2026-01-22
WO2024052313A1 (fr) 2024-03-14
DE102022122779A1 (de) 2024-03-14

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