EP4065519A1 - Cartouche pour traiter de l'eau potable et procédé pour enrichir de l'eau potable au silicium - Google Patents

Cartouche pour traiter de l'eau potable et procédé pour enrichir de l'eau potable au silicium

Info

Publication number
EP4065519A1
EP4065519A1 EP20815762.8A EP20815762A EP4065519A1 EP 4065519 A1 EP4065519 A1 EP 4065519A1 EP 20815762 A EP20815762 A EP 20815762A EP 4065519 A1 EP4065519 A1 EP 4065519A1
Authority
EP
European Patent Office
Prior art keywords
cartridge
water
silicon
cartridge according
silica
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
EP20815762.8A
Other languages
German (de)
English (en)
Inventor
Jürgen JOHANN
Thomas Schmidt
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
Priority claimed from DE102019132319.3A external-priority patent/DE102019132319B4/de
Application filed by BWT Holding GmbH filed Critical BWT Holding GmbH
Publication of EP4065519A1 publication Critical patent/EP4065519A1/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
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C02F1/003—Processes for the treatment of water whereby the filtration technique is of importance using household-type filters for producing potable water, e.g. pitchers, bottles, faucet mounted devices
    • 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
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
    • 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
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • 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
    • 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
    • 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
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • 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
    • C02F2201/006—Cartridges
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/08—Corrosion inhibition
    • 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
    • C02F2307/04—Location of water treatment or water treatment device as part of a pitcher or jug

Definitions

  • the invention relates to a cartridge for treating drinking water, by means of which the drinking water is enriched with silicon and / or softened.
  • the invention relates to a cartridge for a table water filter, for an under-table filter or for a machine for preparing hot and / or cold beverages.
  • the invention also relates to a method for treating drinking water.
  • the invention relates to a cartridge for treating drinking water and to a method for enriching drinking water with silicon.
  • Silicon is a so-called ultra-trace element which the human body needs and which in many cases is beneficial for health.
  • a silicon deficiency can cause health consequences such as hair loss, brittle nails, impaired collagen formation and decreased elasticity of the skin and blood vessels, as well as osteoporosis.
  • a number of diseases such as diabetes, neurodermatitis,
  • Atherosclerosis, kidney stones and goiter formation are associated with a silicon deficiency. With age, the levels of silicon in some tissues, such as blood vessels, bones and skin, may decrease.
  • the taste of the water can also be improved by adding silicon.
  • Preparations containing silicon such as, for example, silica
  • silica can also be suspended in drinking water.
  • the invention is based on the object of providing a cartridge or a method for treating drinking water with which drinking water can be enriched with silicon in a simple and efficient manner.
  • the object of the invention is already achieved by a cartridge for treating drinking water and by a method for treating drinking water.
  • the invention relates to a cartridge for treating water.
  • the cartridge is designed in particular as a cartridge for a table water filter, a machine for preparing hot and / or cold beverages and / or for an under-table water filter.
  • the cartridge contains crosslinked silica, in particular polysilicic acid.
  • the cross-linked silica releases silicon when it passes through water.
  • silicon is calculated below as S1O 2.
  • a silica gel in the form of a water-containing, porous, amorphous modification of silicon dioxide (S1O 2) is preferably used as the crosslinked silica.
  • silica gel instead of crosslinked silica and silica gel, the terms “silica gel”, “amorphous silicon dioxide”, “polysilicic acid” and “silicic acid dioxide” are often used.
  • the release speed is thus of the
  • Silicic acid is a weak acid. Therefore the pH-value and the conductivity of the treated water is changed only insignificantly.
  • the crosslinked silica used for the invention can be produced, for example, as follows.
  • Possible starting materials for the crosslinked silica are aqueous solutions of alkali metal silicate, preferably sodium silicate, from which an amorphous silica is precipitated by adding an acid.
  • alkali metal silicate preferably sodium silicate
  • the precipitated silica is filtered off, washed and dried.
  • the silica is preferably not heated above 250 ° C. during drying, since otherwise the silanol groups can be split off.
  • the crosslinked silica has a loss on ignition at 1000 ° C. of 3% to 30%, preferably 5% to 25%, particularly preferably more than 6% to 15%, preferably more than 7% to 10%, in particular between 7% and 9% (analogous to FGK-AV "ignition loss” (2012-12)).
  • the ignition loss is therefore “Loss on ignition” determined according to the FGK-AV, only at a slightly lower temperature of 1000 ° C.
  • the loss on ignition is a measure of the proportion of silanol groups.
  • silicas contain a certain proportion of chemically bound water in the form of silanol groups. This is determined by the loss on ignition at 1000 ° C.
  • the loss on ignition can be determined on the basis of the original substance, but is calculated on the basis of the substance dried at 105 ° C or 110 ° C. The loss on ignition thus relates to a sample predried at 105 ° C or 110 ° C.
  • the silica preferably has a loss on drying of more than 30%, preferably more than 40%, particularly preferably more than 50%, in particular a loss on drying of 55 to 65%.
  • the loss on drying can be determined according to DIN EN ISO 787-2 - 1995-04.
  • the silica can be heated up to about 130 ° C. or even up to 145 ° C. and thereby dried without the solubility dropping significantly.
  • the silica has a specific surface area of more than 300 m 2 / g, preferably more than 700 m 2 / g, particularly preferably more than 800 m 2 / g, in particular between 820 and 1000 m 2 / g.
  • the specific surface can be determined according to the BET method according to DIN ISO 9277-2017-07.
  • Silica is preferably used which has a solubility at 25 ° C. (in deionized water) of over 80 mg / l, preferably over 100 mg / l and particularly preferably over 150 mg / l.
  • the solubility is between 140 and 180 mg / 1 (calculated as S1O2)
  • the solubility can be determined by stirring a sufficient amount of silica, which is so large that it does not completely dissolve, in water at 25 ° C until saturation is achieved.
  • the silica and / or the cation exchanger can be in the form of granules, in particular with an average grain size of 0.5 to 3.0 mm.
  • the inner structure of the silica consists of a large network of interconnected microscopic pores with a high content of silanol groups, which can attract and hold water through physisorption and capillary effects. This gives the material sufficient solubility in water.
  • silica which has a high specific surface area and a high proportion of silanol groups (characterized by a high loss on ignition at 1000 ° C).
  • the cartridge is preferably filled with synthetically produced silica. It can be used as silica in particular under the CAS no. 112926-00-8, 7631-86-9, 1343-98-2, 7699-41-4, 63231-67-4 or 10193-36-9 registered substances can be used.
  • the silicon thus precipitates and forms a protective layer on surfaces, in particular on the inner wall of metal lines.
  • the water can also be used to fill heating or cooling circuits. This applies in particular to circuits with lines made of unalloyed and low-alloy ferrous materials.
  • the cartridge preferably contains 20 to 10,000 ml, preferably 80 to 200 ml, crosslinked silica.
  • the silica is designed in particular as granules.
  • the cartridge preferably comprises both crosslinked silica and an ion exchanger, in particular a cation exchanger.
  • the cation exchanger is preferably loaded with at least hydrogen, in particular at least 10%, preferably at least 30%, of its total capacity. Furthermore, the cation exchanger can be additionally loaded with magnesium for the delivery of magnesium to the drinking water, in particular to at least 10% of its total capacity.
  • a filter cartridge can be provided which both softens the drinking water and adds silicon to the drinking water.
  • Crosslinked silica and cation exchangers can in particular be present in a volume ratio from 1:10 to 10: 1, preferably from 1: 3 to 3: 1.
  • a weakly acidic ion exchange material is understood to mean, in particular, a material as specified in Hartinger, Ludwig, "Handbuch der Abwasser- und Recyclingtechnik für die Metallver tode Industrie", Carl Hanser Verlag, Kunststoff, Vienna 1991, among others. According to Chapter 5.2.3.3 of this manual, a distinction is made between cation exchangers and anion exchangers for ion exchangers. Cation exchangers can be divided into strongly acidic and weakly acidic ones and anion exchangers into strongly basic ones and weakly basic exchange resins, which behave accordingly in the exchange reactions as strong or weak acids or as strong or weak bases.
  • the cation exchanger is preferably designed as a weakly acidic ion exchanger, in particular as a weakly acidic ion exchange resin.
  • Such an ion exchange material is commercially available, for example, under the trade name LEWATIT® S8229.
  • the cation exchanger is also loaded with other substances, in particular minerals such as magnesium, lithium, potassium and / or zinc, preferably to at least 5%, particularly preferably to at least 20%, of its total capacity.
  • Silica and cation exchangers are preferably in the form of a mixed bed, in particular as mixed granules.
  • the silica and / or the cation exchanger can also be used as a powder or as preferably a porous block of interconnected particles are present.
  • the water is passed over an alkalizing filter material.
  • the cartridge is also filled with an alkalizing filter material, in particular with at least one of the materials described below.
  • the amount of alkalizing filter material is preferably at least 5% by weight of the crosslinked silica.
  • the cartridge can contain, for example, at least one or a mixture of at least two of the materials selected from the group consisting of dolomites, semi-burnt dolomites,
  • Carbonates in particular calcium carbonate and / or magnesium carbonate
  • Oxides in particular metal and / or semi-metal oxides, in particular calcium oxide and / or magnesium oxide and / or magnesium hydroxide and / or alkali metal hydroxides and / or Alkaline earth hydroxides.
  • the alkalizing filter material can be present as a solid and in particular as granules.
  • the alkalizing filter material preferably increases the pH of the water by at least 0.05, particularly preferably at least 0.2 (compared to the pH of the water passed over the crosslinked silica without the alkalizing filter material).
  • the alkalizing filter material depending on the raw water, can increase the solubility of the crosslinked silica. This leads to improved silicate formation.
  • the increase in pH also has a corrosion-reducing effect.
  • alkaline drinking water can also have a positive effect on human health and some people also taste better with alkalized drinking water.
  • the alkalizing material can in particular be used as a solid.
  • it can be in the form of granules, in particular with an average grain size of 0.5 to 3.0 mm.
  • the invention also relates to a table water filter, a machine for preparing beverages, in particular hot and / or cold beverages, and an under-table water filter which comprises the cartridge described above.
  • the invention also relates to a method for treating water, in particular using a cartridge and / or a crosslinked silica, as described above.
  • the method is carried out in particular with one of the media described above.
  • the method for producing a drink is carried out.
  • the water can also be used to fill a heating or cooling system.
  • the drinking water to be treated is passed over crosslinked silica and enriched with silicon.
  • the method is preferably set with regard to the residence time and amount of the ion exchange material in such a way that 1 to 150 mg / l silicon, preferably 10 to 70 mg / l silicon, are added to the drinking water to be treated (silicon in each case calculated as SiCh).
  • the drinking water to be treated is preferably softened at the same time, in particular with one of the cation exchange materials described above.
  • the above-mentioned enrichment can therefore be achieved both with cartridges for table water filters, in which the retention time of the water to be treated is less than one minute, and with large filters, e.g. for drinking water distribution networks, with retention times of up to 30 minutes.
  • the water to be treated is passed through a reverse osmosis system before being passed over the crosslinked silica.
  • the water is first demineralized and then enriched with a defined amount of silicon.
  • Fig. 1 is a perspective view of a table water filter.
  • Figure 2 is a cut away view of a cartridge with an ion exchange material.
  • Fig. 3 shows a filter candle
  • Fig. 4 shows schematically the cartridge inserted into the tank of a machine for the preparation of beverages.
  • FIG. 1 shows a table water filter 1 in a perspective view.
  • the table water filter 1 comprises a filter cartridge 2 which is inserted into a funnel 3 which in turn is inserted into the jug 4. Drinking water can be filled into the funnel 3 via the filling opening 6, which water then passes through the cartridge 2 and collects in the water collecting space 5.
  • FIG. 2 shows a cut-away view of the cartridge 2 shown in FIG. 1.
  • the cartridge 2 comprises a housing 7, which comprises at least one chamber 9, which with a
  • Ion exchange material and crosslinked silica 8 is filled.
  • the filling of the cartridge 2 is in particular a granulate which is designed as a mixed bed with a weakly acidic ion exchanger loaded with hydrogen ions as well as cross-linked silica and optionally an alkalizing filter material.
  • the chamber 9 can also be filled with further water treatment media, in particular with activated carbon (not shown).
  • FIG. 3 shows an alternative embodiment of a device for treating water, which is designed as a filter candle 12.
  • such a filter candle 12 is not flowed through due to gravity, but is connected to a drinking water pipe via a suitable adapter.
  • the filter candle comprises a head 14 with a thread 13.
  • the head 14 includes inlet and outlet.
  • the filter candle 12 can easily be screwed in via the thread 13.
  • the basic structure of such filter cartridges is known to the person skilled in the art.
  • Fig. 4 shows schematically the tank 15 of a machine for preparing beverages, in particular a machine for preparing coffee.
  • the tank 15 comprises a suction nozzle 16, via which water is supplied to the machine via a pump.
  • a filter cartridge 17 which with a
  • Ion exchange material and crosslinked silica 8 is filled.
  • the ion exchange material is charged with hydrogen in accordance with the embodiments described above. With reference to the graph according to FIG. 5, the enrichment of the drinking water with silicon will be explained in more detail.
  • the amount of filtered water is plotted on the x-axis and the silicon content of the eluate is plotted on the y-axis.
  • the granulate shown here can be used to enrich the water with silicon over the entire service life of the filter cartridge and to soften it at the same time.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Hydrology & Water Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Treatment Of Water By Ion Exchange (AREA)
  • Water Treatment By Sorption (AREA)
  • Color Image Communication Systems (AREA)

Abstract

L'invention concerne une cartouche et un procédé pour enrichir de l'eau potable au silicium. On utilise un acide silicique réticulé qui peut être mélangé avec : un échangeur de cations qui est de préférence chargé avec de l'hydrogène ; et/ou des agents alcalinisants ; et/ou du charbon actif. Le silicium peut être libéré dans l'eau par l'intermédiaire de l'acide silicique.
EP20815762.8A 2019-11-28 2020-11-25 Cartouche pour traiter de l'eau potable et procédé pour enrichir de l'eau potable au silicium Pending EP4065519A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102019132319.3A DE102019132319B4 (de) 2019-11-28 2019-11-28 Kartusche zur Anreicherung von Trinkwasser mit Silicium sowie deren Verwendung
DE102020104962 2020-02-26
PCT/EP2020/083310 WO2021105177A1 (fr) 2019-11-28 2020-11-25 Cartouche pour traiter de l'eau potable et procédé pour enrichir de l'eau potable au silicium

Publications (1)

Publication Number Publication Date
EP4065519A1 true EP4065519A1 (fr) 2022-10-05

Family

ID=73598854

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20815762.8A Pending EP4065519A1 (fr) 2019-11-28 2020-11-25 Cartouche pour traiter de l'eau potable et procédé pour enrichir de l'eau potable au silicium

Country Status (6)

Country Link
US (1) US20220411285A1 (fr)
EP (1) EP4065519A1 (fr)
CN (1) CN114746368B (fr)
AU (1) AU2020394503B2 (fr)
IL (1) IL293311B2 (fr)
WO (1) WO2021105177A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4174032A1 (fr) * 2021-11-02 2023-05-03 BWT Holding GmbH Cartouche et procédé de traitement de l'eau potable
DE102021134546A1 (de) 2021-12-23 2023-06-29 Bwt Holding Gmbh Vorrichtung und Verfahren zur Anreicherung von Wasser mit Silizium und/oder Phosphat
US12005408B1 (en) 2023-04-14 2024-06-11 Sharkninja Operating Llc Mixing funnel

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DE1517496A1 (de) * 1963-11-07 1969-11-27 Rww Filter Gmbh Verfahren zum Schutz von kalt- und warmwasserfuehrenden Rohrleitungssystemen,insbesondere gegen Sauerstoff- und Kohlensaeurekorresion
CH569504A5 (en) * 1973-06-20 1975-11-28 Filtrabo Anstalt Drinking water filter with tap attachment - comprises housing with internal vessel contg. mixed granulate
IL122851A0 (en) * 1998-01-05 1998-08-16 Rotem Amfert Negev Ltd Optimally dispersible precipitated silica particulates process for their preparation and their use
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Also Published As

Publication number Publication date
AU2020394503B2 (en) 2025-12-18
US20220411285A1 (en) 2022-12-29
IL293311B1 (en) 2025-11-01
IL293311B2 (en) 2026-03-01
IL293311A (en) 2022-07-01
AU2020394503A1 (en) 2022-07-14
WO2021105177A1 (fr) 2021-06-03
CN114746368A (zh) 2022-07-12
CN114746368B (zh) 2023-12-19

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