An ion exchange device main body 3 includes: a tubular body 31 into which an ion exchange resin bag 5 accommodating the ion exchange resin is inserted through an opening and which has a liquid outlet 312 in which a liquid outlet port 314 for discharging an ion exchange target liquid to outside is formed; a lid 32 that is supported by the tubular body 31 and has a gas injection portion 324 in which a gas injection port 325 for injecting a to an inside 311 of the tubular body 31 is formed; a lead-out pipe 42 that is connected to the liquid outlet 312 and guides the ion exchange target liquid to the outside; and a check valve 44 that is provided in the lead-out pipe 42 and prevents the ion exchange target liquid from flowing backward from the outside to the inside.

An ion exchange device main body 3 includes: a tubular body 31 into which an ion exchange resin bag 5 accommodating the ion exchange resin is inserted through an opening and which has a liquid outlet 312 in which a liquid outlet port 314 for discharging an ion exchange target liquid to outside is formed; a lid 32 that is supported by the tubular body 31 and has a gas injection portion 324 in which a gas injection port 325 for injecting a to an inside 311 of the tubular body 31 is formed; a lead-out pipe 42 that is connected to the liquid outlet 312 and guides the ion exchange target liquid to the outside; and a check valve 44 that is provided in the lead-out pipe 42 and prevents the ion exchange target liquid from flowing backward from the outside to the inside.

A purification method for an aqueous hydrogen peroxide solution, includes passing the aqueous hydrogen peroxide solution through a first H-form strong cation exchange resin column 1, a salt-form strong anion exchange resin column 2 and a second H-form strong cation exchange resin column 3. An H-form strong cation exchange resin having crosslinking of 6% or less, an H-form strong cation exchange resin having crosslinking of 9% or more, or an H-form strong cation exchange resin produced by steps (a) and (b) is used as an H-form strong cation exchange resin packed in the second H-form strong cation exchange resin column 3: (a) copolymerizing a monovinyl aromatic monomer with a crosslinkable aromatic monomer having a non-polymerizable impurity content of 3% by weight or less therein using a predetermined amount of a specified radical polymerization initiator at a predetermined polymerization temperature to obtain a crosslinked copolymer; and (b) sulfonating the crosslinked copolymer.

A purification method for an aqueous hydrogen peroxide solution, includes passing the aqueous hydrogen peroxide solution through a first H-form strong cation exchange resin column 1, a salt-form strong anion exchange resin column 2 and a second H-form strong cation exchange resin column 3. An H-form strong cation exchange resin having crosslinking of 6% or less, an H-form strong cation exchange resin having crosslinking of 9% or more, or an H-form strong cation exchange resin produced by steps (a) and (b) is used as an H-form strong cation exchange resin packed in the second H-form strong cation exchange resin column 3: (a) copolymerizing a monovinyl aromatic monomer with a crosslinkable aromatic monomer having a non-polymerizable impurity content of 3% by weight or less therein using a predetermined amount of a specified radical polymerization initiator at a predetermined polymerization temperature to obtain a crosslinked copolymer; and (b) sulfonating the crosslinked copolymer.

The present invention relates to a system for reducing a content of 5-hydroxymethylfurfural in a high fructose syrup, including an ion exchange positive column and an ion exchange negative column for performing cation and anion removals in sequence for an F42 high fructose syrup obtained by performing isomerization and first decolorization, a heat exchanger for performing heat exchange and temperature reduction for an F55 high fructose syrup obtained by performing concentration, chromatographic separation, blending and second decolorization in sequence for the F42 high fructose syrup subjected to ion exchange, a mixed bed column for performing purification for the heat-exchanged F55 high fructose syrup, and an evaporation tank for performing concentration for the F55 high fructose syrup subjected to mixed bed treatment. The present invention further provides a method of reducing a content of 5-hydroxymethylfurfural in a high fructose syrup. In the present invention, optimization is performed for ion exchange and operation modes and parameters of the mixed bed such that the HMF content in the high fructose syrup product is reduced in a case of ensuring the quality of the high fructose syrup product, thus improving the quality of the high fructose syrup product.

The present invention relates to a system for reducing a content of 5-hydroxymethylfurfural in a high fructose syrup, including an ion exchange positive column and an ion exchange negative column for performing cation and anion removals in sequence for an F42 high fructose syrup obtained by performing isomerization and first decolorization, a heat exchanger for performing heat exchange and temperature reduction for an F55 high fructose syrup obtained by performing concentration, chromatographic separation, blending and second decolorization in sequence for the F42 high fructose syrup subjected to ion exchange, a mixed bed column for performing purification for the heat-exchanged F55 high fructose syrup, and an evaporation tank for performing concentration for the F55 high fructose syrup subjected to mixed bed treatment. The present invention further provides a method of reducing a content of 5-hydroxymethylfurfural in a high fructose syrup. In the present invention, optimization is performed for ion exchange and operation modes and parameters of the mixed bed such that the HMF content in the high fructose syrup product is reduced in a case of ensuring the quality of the high fructose syrup product, thus improving the quality of the high fructose syrup product.

A method for purifying an organic solvent has a first treatment of bringing an organic solvent to be treated into contact with an H-type cation exchanger, and a second treatment of bringing a treated liquid from the first treatment into contact with an anion exchanger and an H-type strongly acidic cation exchanger. According to the present application, the provided method and an apparatus for purifying an organic solvent remove metal impurities of both metal species of monovalent and polyvalent metals in the organic solvent.

A method for purifying an organic solvent has a first treatment of bringing an organic solvent to be treated into contact with an H-type cation exchanger, and a second treatment of bringing a treated liquid from the first treatment into contact with an anion exchanger and an H-type strongly acidic cation exchanger. According to the present application, the provided method and an apparatus for purifying an organic solvent remove metal impurities of both metal species of monovalent and polyvalent metals in the organic solvent.

A water treatment method to generate potable water and a fertilization or fertigation product is provided. The method comprises the steps of: passing a raw water stream through an anion exchange resin (14a, 14b) to generate a potable water output; regenerating the anion exchange resin (14a, 14b) using a weak potassium chloride solution to generate a product output comprising potassium sulphate, potassium bicarbonate, and preferably also potassium nitrate, suitable for use as or as a precursor to a liquid fertilization or fertigation product.

A water treatment method to generate potable water and a fertilization or fertigation product is provided. The method comprises the steps of: passing a raw water stream through an anion exchange resin (14a, 14b) to generate a potable water output; regenerating the anion exchange resin (14a, 14b) using a weak potassium chloride solution to generate a product output comprising potassium sulphate, potassium bicarbonate, and preferably also potassium nitrate, suitable for use as or as a precursor to a liquid fertilization or fertigation product.