28 results about "Anion exchanger" patented technology

The invention discloses an ion exchange washing alkaline water recycling system, and relates to the field of water treatment. The system comprises an anion exchanger, a washing alkaline water collection pipeline, an online monitoring unit, a shunting switching unit, a weak acid cation exchange treatment unit, an acid liquid regeneration unit, a pipeline conveying pump, a decarburization unit, an intermediate water tank, a recycling unit and a control unit. The online monitoring unit is arranged at the washing drainage end of the anion exchanger, the water quality of the washing alkaline water is detected in real time, and graded recovery of the washing alkaline water is achieved in combination with the shunt switching unit; the recycled washing alkaline water enters a weak acid cation exchange treatment unit to be subjected to ion exchange treatment so as to reduce the alkalinity of the water body; meanwhile, the weak-acid cation exchange resin is regenerated by utilizing acidic waste liquid generated by regeneration of the cation exchange bed, so that synergistic utilization of acid and alkali resources is realized; the treated water body sequentially passes through the decarburization unit and the middle water tank and then is reused for the pure water preparation system.

A process for preparing a modified latex particle wherein the particle comprises a polycondensate bonded to a functional group on the latex particle and the process for forming a polycondensate comprises reacting an amino group present on the latex particle with (i) at least a first polyfunctional compound, or (ii) at least a first multifunctional compound having at least two functional groups that react with said functional groups of the latex, and at least a first amine compound comprising an amino group selected from the group consisting of ammonia, primary amines and secondary amines, or (ii) at least a second multifunctional compound having at least two functional groups that react with said functional groups of the latex, and at least a second amine compound comprising an amino group selected from the group consisting of ammonia, primary amines and secondary amines, to form a first polycondensate reaction product comprising ion exchange sites and a first unreacted excess of functional groups.

A bipolar electrodialysis method using an electrodialysis apparatus with a bipolar membrane (BP) and a cation exchange membrane (C) disposed between an anode (10) and a cathode (11) to generate acid and alkali from salt, characterized in that when the electrodialysis apparatus is de-energized, the alkali chamber facing the anion exchanger (a) of the bipolar membrane (BP) is acid-washed with an acidic aqueous solution with a pH of less than 3.5.

1. A method for producing modified latex particles, the particles comprising condensation polymers attached to functional groups on the latex particles, and the method for forming the condensation polymer comprises reacting amino groups present on the latex particles with either (i) at least a first multifunctional compound having at least two functional moieties reactive with the functional groups of the latex, or (ii) at least a first multifunctional compound having at least two functional moieties reactive with the functional groups of the latex, and at least a first amine compound comprising an amino group selected from the group consisting of ammonia, primary, and secondary amines, to form a first condensation polymer reaction product comprising ion exchange sites and a first excess of unreacted functional moieties.

A method for making modified latex particles, wherein the particles comprise condensation polymers bonded to functional groups on the latex particles and the method for forming the condensation polymer comprises reacting the amino groups present on the latex particles with (i) at least a first polyfunctional compound, having at least two functional moieties reactive with said functional groups of the latex, or (ii) at least a first polyfunctional compound, having at least two functional moieties reactive with said functional groups of the latex and at least a first amine compound, comprising amino groups selected from the group consisting of ammonia, a primary and a secondary amine to form a first condensation polymer reaction product comprising ion exchanging sites and a first unreacted excess of functional moieties.

The application belongs to the field of coolant purification of nuclear power plants, and particularly relates to a coolant circulating purification system and method applied to nuclear power plants. The system comprises: a primary coolant storage system cation exchanger, a primary coolant storage system anion exchanger, a primary coolant storage system resin collector, a primary coolant treatment system cation exchanger, a primary coolant treatment system anion exchanger, and a primary coolant treatment system resin collector. A third bypass is arranged in front of the inlet of the primary coolant treatment system cation exchanger, and a valve is arranged in the third bypass to connect to a position after the inlet of the primary coolant storage system cation exchanger. The application can effectively improve the reliability of the primary coolant treatment system in purifying the coolant, and can switch the primary coolant storage system ion exchanger to operate in the case of failure of the primary coolant treatment system ion exchanger.

Provided is a method for purifying an organic solvent and a device for purifying an organic solvent, with which it is possible to reduce the amount of impurities such as metal impurities of as many kinds as possible from the organic solvent. The method for purifying an organic solvent includes an anion exchanger contact step for bringing an organic solvent to be purified into contact with an anion exchanger A and an anion exchanger B, wherein: the anion exchanger A is an anion exchanger having at least one ionic form that is selected from the group consisting of an OH form, a free base form, a carbonate form, and a bicarbonate form; and the anion exchanger B is a chelate resin that contains a glucamine-type ion exchange group.

Disclosed herein is an anion exchanger, a method for manufacturing an anion exchanger, anion exchange devices, and a system comprising the anion exchanger, wherein the anion exchanger comprises a polyDADMAC polymer, and wherein the anion exchanger is suitable for purifying and concentrating [18F]fluoride.

A water treatment method includes: adding a chemical to water to be treated to obtain water to be treated which contains iodine and is provided with oxidizing power; and supplying the water to be treated that has undergone the chemical addition to an electrodeionization device (EDI device) to treat the water to be treated in the EDI device. At least a part of an ion exchanger filled in a deionization chamber of the EDI device is an anion exchanger.

The utility model discloses a device for recovering condensate water generated by a salt-making MVR (mechanical vapor recompression) device, which belongs to the technical field of condensate water recovery and is characterized by comprising a condensate water tank, the condensate water tank is connected with a filter through a pipeline, and the filter is connected with a cation exchanger through a pipeline. The cation exchanger is connected with a carbon remover through a pipeline, the carbon remover is connected with an anion exchanger through a pipeline, the anion exchanger is connected with a mixed ion exchanger through a pipeline, the mixed ion exchanger is connected with a desalting water tank through a pipeline, and a backwashing water pump is connected between the condensate water tank and the filter. The device can keep the original shape of incoming water, the water production rate is improved, and the stable operation of the system is ensured.

The disclosure relates to a process for producing magnesium hydrogen carbonate and / or calcium hydrogen carbonate. An anion exchanger loaded with bicarbonate ions is provided, and a solution containing magnesium salt and / or calcium salt is then passed through the anion exchanger.

A method for making modified latex particles, wherein the particles comprise condensation polymers bonded to functional groups on the latex particles and the method for forming the condensation polymer comprises reacting the amino groups present on the latex particles with (i) at least a first polyfunctional compound, having at least two functional moieties reactive with said functional groups of the latex, or (ii) at least a first polyfunctional compound, having at least two functional moieties reactive with said functional groups of the latex and at least a first amine compound, comprising amino groups selected from the group consisting of ammonia, a primary and a secondary amine to form a first condensation polymer reaction product comprising ion exchanging sites and a first unreacted excess of functional moieties.

The invention discloses a method for preparing an electrolyte precursor through fluorine anion exchange and application of the electrolyte precursor in a solid electrolyte. MXa and LiF are used as raw materials, a mixed product of fluoride and a nano LiX phase is generated in situ through mechanical mixing, the fluoride is Li MF type or MF type, and the mixed product is a solid electrolyte precursor; x in MXa is Cl, Br or I, and a is 2, 3, 4 or 5. The solid electrolyte composite precursor is prepared by utilizing a fluorine anion exchange method, and the high-performance halide or sulfide solid electrolyte is prepared by utilizing the complementary synergistic effect of a nano LiX phase and fluoride in the precursor and is applied to an all-solid lithium ion battery. The preparation method disclosed by the invention is simple in preparation process and high in repeatability, and is favorable for preparing a high-performance solid electrolyte material which is high in stability to lithium metal, wide in electrochemical window and high in ionic conductivity.

The invention discloses a clean-up and split-flow white water recovery system and method. The clean-up and split-flow white water recovery system comprises a pretreatment unit, an ion treatment unit and a post-treatment unit, wherein the ion treatment unit and the post-treatment unit are connected with the pretreatment unit in series; delivering the white water containing cations or anions to a white water collection tank, the white water input stream flowing through an anion exchanger containing anions / cations and a cation exchanger; the cation exchanger and the anion exchanger are connected in series to remove at least part of the anions / cations from the white water input flow so as to generate high-quality water subjected to ion exchange, the white water can be effectively recycled, treated and reused, energy consumption is reduced, and the production cost is reduced.

This invention discloses a low-temperature high-conductivity composite solid electrolyte membrane, its preparation method, and its applications, relating to the field of solid-state lithium battery materials technology. The low-temperature high-conductivity composite solid electrolyte membrane comprises: a polymer matrix composed of poly(1,3-dioxolane) and polyvinylidene fluoride-hexafluoropropylene copolymer; an ion-conducting network composed of a metal-organic framework filler with surface-modified -SO3Li groups and lithium sulfonate carbon nanotubes arranged axially along the polymer matrix; and a first antifreeze interface layer and a second antifreeze interface layer disposed on opposite sides of the polymer matrix, wherein the first and second antifreeze interface layers are respectively succinic anion exchanger-glutaronitrile eutectic plastic crystal layers composed of succinic anion exchanger, glutaronitrile, lithium salt, and nano-reinforcing agents. It is suitable for low-temperature environments such as polar scientific research equipment and spacecraft, solving the industrial problems of drastic increase in low-temperature grain boundary impedance and interface contact failure in traditional solid electrolytes.

An efficient way of isolating sialic acid from a fermentation broth is described. The sialic acid contained in the fermentation broth is produced by bacterial fermentation. The method of the invention comprises the steps of removing biomass from the fermentation broth, subjecting the resulting solution to at least one of a cation exchanger treatment and an anion exchanger treatment, and removing salts after the ion exchanger treatment. The method can provide sialic acid in the form of spray-dried sialic acid and in the form of sialic acid crystals.

The present invention provides a method and apparatus for purifying organic solvents that can reduce the amount of impurities, such as metal impurities, of as many types as possible from the organic solvent. [Solution] A method for purifying an organic solvent, comprising an anion exchanger contact step of contacting the organic solvent to be purified with anion exchanger A and anion exchanger B, wherein anion exchanger A is an anion exchanger having at least one ionic form selected from the group consisting of OH form, free base form, carbonate form, and bicarbonate form, and anion exchanger B is a chelate resin containing a glucamine-type ion exchange group.

The utility model relates to the related technical field of nylon 6 slice preparation, in particular to a nylon 6 slice extraction water purification system. Comprising a candle filter, an efficient fiber ball filter, a hot water storage bin, a pure recovery extraction water storage tank, a backwashing water collecting tank, a cation exchanger, an anion exchanger, an anti-corrosion pump, an acid solution tank, an alkaline solution tank and a water pump, the efficient fiber ball filter comprises an inlet, a fiber ball layer, a fiber ball replacement inlet, an electric stirrer, a left valve, a right valve, a hot water input port and an extracted water outlet, and a differential pressure sensor is arranged at the pipeline joint on one side of the hot water input port. According to the nylon-6 slice extraction water purification system, the extraction water purification effect can be well improved and the service life of the cation exchanger and the anion exchanger can be well prolonged by adding multiple times of filtration of extraction water, cleaning of the efficient fiber ball filter and resin regeneration of the anion-cation filter.

This utility model provides an anion exchanger backwashing system, relating to the field of chemical desalination and demineralized water production technology. The anion exchanger backwashing system includes an anion exchanger, a resin trap, a mixed ion exchanger, and a storage tank connected in sequence. A backwashing pipeline is connected to the storage tank, and a backwash pump and a backwash regulating valve are installed on the backwashing pipeline. An inlet valve is installed on the connecting pipeline between the resin trap and the mixed ion exchanger. The other end of the backwashing pipeline is connected to the connecting pipeline between the resin trap and the inlet valve. The anion exchanger backwashing system can effectively flush away broken resin stuck on the water cap during the service life, ensuring the water production capacity of the anion exchanger, reducing resin breakage, and effectively extending its service life.

Method for determining the TOC content of an aqueous sample (1) using a measuring device (2), comprising the steps: (i) Exchange of inorganic cations and anions contained in the aqueous sample by means of an ion exchanger (3) comprising a mixed bed resin containing a cation exchanger and an anion exchanger (ii) Measuring a first conductivity (LF1) of the aqueous sample (1) by the first measuring unit (M1); (iii) Oxidation of organic carbon contained in the aqueous sample (1) to CO2 and / or H + and / or HCO3 - and / or Na + + HCO3 - by the oxidation device (4); (iv) Measuring a second conductivity (LF2) of the aqueous sample (1) by the second measuring unit (M2); (v) Determining the TOC content of the aqueous sample from the difference between the measured first and second conductivities of the aqueous solution (LF1, LF2).

A method for removing nitrogen oxides and / or sulfur oxides from a gas to be treated containing nitrogen oxides and / or sulfur oxides and carbon dioxide, the method includes a gas supply step of supplying the gas to be processed to an anion exchanger filled tower filled with an anion exchanger.

Heavy metal-free, recyclable, environmentally friendly molded parts and insulating materials (1), containing carbon dioxide and / or pollutant-adsorbing materials (1), excluding silver and iron (2) at least one denatured fungal mycelium as the first component, (3) at least one particulate second component selected from the group consisting of (3.1) Alkaline earth oxides and / or hydroxides, (3.2) Mixtures of at least one alkaline earth oxide and / or hydroxide (3.1) and at least one component (3.2.1) which forms sparingly soluble carbonates with carbon dioxide and / or which adsorbs carbon dioxide, (3.3) pyrogenic biochars and (3.3) Anion exchangers in the OH form, metal-organic frameworks (MOFs), covalent organic frameworks (COFs) and porous electron-rich covalent organonitride frameworks (PECNOFs), wherein the filaments (2.2) of the denatured fungal mycelium (2) form a network (2.1) that completely or partially encloses the particles of the at least one particulate second component (3).

A water treatment device according to the present invention is provided with: a regenerative double-bed ion exchange tower filled with an anion exchanger and a cation exchanger; and a catalyst tower which is located on the downstream side of the regenerative double-bed ion exchange tower and is filled with a platinum group catalyst carrier, and which removes anions from water to be treated containing hydrogen peroxide and anions.

The utility model relates to the field of hazardous waste treatment equipment, in particular to a treatment device for removing heavy metal from percolate, which comprises a cation exchanger, an anion exchanger, a mixed ion exchanger and a communication component. The leachate containing heavy metal ions can be treated by a cation exchanger and an anion exchanger and can form reclaimed water for reuse; the mixed ion exchanger is arranged on one side of the anion exchanger, the mixed ion exchanger is communicated with the anion exchanger and the cation exchanger through the communication assembly, and the mixed ion exchanger can purify water discharged by the anion exchanger. The purified water liquid can be conveyed into the cation exchanger and the anion exchanger for flushing in the regeneration process so as to facilitate in-vivo synchronous regeneration of the cation exchanger and the anion exchanger, so that the treatment effect of removing heavy metals from the leachate can be improved, and the consumption of purified water resources can be reduced.

The invention belongs to the field of fiber production, and particularly relates to a method for treating an NMMO (N-methylmorpholine-N-oxide) solvent recovered in a lyocell fiber production process. The method comprises the following steps: a) a recovered NMMO solvent is sequentially subjected to filtration and impurity removal, decoloring by an anion exchanger and metal ion removal by a cation exchanger, and a purified solvent is obtained; b) performing chromaticity detection on the purified solvent, and if a detected chromaticity value is greater than a chromaticity set value, returning the purified solvent to the step a) for circular treatment; and if the detected chromaticity value is less than or equal to the chromaticity set value, evaporating and concentrating the purified solvent. According to the method provided by the invention, the subsequent treatment path of the solvent is optimized according to the chromaticity of the NMMO solvent after cation exchange, and the high-chromaticity solvent after cation exchange is prevented from entering the next evaporation and concentration process.

A water treatment method according to the present invention comprises the steps of: removing dissolved oxygen from water to be treated, which contains dissolved oxygen and an organic substance, by means of a first deoxygenation device (33); irradiating the treated water of the first deoxygenation device (33) with ultraviolet rays by means of an ultraviolet irradiation device (34); and passing the treated water from the ultraviolet irradiation device (34) through an ion exchanger filling device (35) filled with at least an anion exchanger (A). The ion exchanger filling device (35) removes hydrogen peroxide generated by irradiation of ultraviolet rays from the ultraviolet irradiation device (34) from the water treated by the ultraviolet irradiation device (34), and the water treated by the ultraviolet irradiation device (34) is passed through the anion exchanger (A) of the ion exchanger filling device (35) at an air speed of less than 160 ( / h).

In an electrodeionization (EDI) device including a deionization chamber and a concentration chamber provided on a side to a cathode of the deionization chamber, the deionization chamber is divided into a plurality of regions aligned in a flow direction of water to be treated. A first region, which is a region located at most upstream side of flow of the water, is filled with a mixture of an anion exchanger and a cation exchanger such that a volume ratio of the cation exchanger to a total volume of the ion exchangers is more than 50% and 90% or less, and a second region, which is a region located at most downstream side, is filled with a mixture of the anion exchanger and the cation exchanger such that a volume ratio of the anion exchanger to a total volume of ion exchangers is more than 50% and 90% or less.

The present application relates to the technical field of resin regeneration, and particularly relates to a method for accurately judging the end point of anion exchanger regeneration, which comprises the following steps: injecting an ionic liquid membrane alkali into an alkali metering tank in an anion exchanger, and backwashing the anion exchanger; after resin particles in the anion exchanger sink, discharging the upper water in a resin tank; adding a regeneration liquid into the resin tank and opening an alkali outlet valve, and recording the real-time foam amount of the alkali outlet valve by using a camera; inputting the real-time foam amount into a trained neural network model, and determining the regeneration liquid feeding time corresponding to the maximum value of the real-time foam amount by using the neural network model; based on the regeneration liquid feeding time, closing the alkali outlet valve, and continuously feeding the regeneration liquid for a predetermined time, so as to accurately judge the end point of the anion exchanger regeneration. The method is more accurate in judging the successful end point of the anion exchanger regeneration, and is more efficient; and the method avoids the possibility that the poor quality of desalted water caused by unqualified regeneration affects the safe operation of a boiler.