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.

Systems and methods for production of hydrogen peroxide, such as high-test peroxide, are disclosed. Representative systems and methods also include aerospace systems and space exploration missions implementing systems and methods for production of hydrogen peroxide. A representative system for making hydrogen peroxide can include: a water electrolyzer for receiving water and separating at least some of the water into hydrogen and oxygen; a proton-exchange membrane cell for receiving water, hydrogen from the water electrolyzer, and oxygen from the water electrolyzer and for combining the hydrogen, the oxygen, and the water into a first hydrogen peroxide solution having a first concentration of hydrogen peroxide in water; and a hydrogen peroxide concentrator for removing at least some of the water from the first hydrogen peroxide solution to yield a second hydrogen peroxide solution that has a second concentration of hydrogen peroxide in water that is greater than the first concentration.

Systems and methods for production of hydrogen peroxide, such as high-test peroxide, are disclosed. Representative systems and methods also include aerospace systems and space exploration missions implementing systems and methods for production of hydrogen peroxide. A representative system for making hydrogen peroxide can include: a water electrolyzer for receiving water and separating at least some of the water into hydrogen and oxygen; a proton-exchange membrane cell for receiving water, hydrogen from the water electrolyzer, and oxygen from the water electrolyzer and for combining the hydrogen, the oxygen, and the water into a first hydrogen peroxide solution having a first concentration of hydrogen peroxide in water; and a hydrogen peroxide concentrator for removing at least some of the water from the first hydrogen peroxide solution to yield a second hydrogen peroxide solution that has a second concentration of hydrogen peroxide in water that is greater than the first concentration.

A photothermal catalytic method for production of hydrogen peroxide without a sacrificial reagent on the basis of a porphyrin-based supermolecule is provided. The method includes the following steps: uniformly mixing a porphyrin-based supermolecule photocatalyst with a concentration of 0.3-1.5 g/L with ultrapure water, conducting irradiation with a visible light for a period of time under stirring at a temperature of 40-80° C. and an O.sub.2 flow rate of 50-150 mL/min, and then filtering and concentrating a reaction liquid to obtain an aqueous hydrogen peroxide solution with a high concentration. According to the new photothermal catalytic method for preparing the hydrogen peroxide provided in the present disclosure, no organic solvent (such as ethanol, isopropanol and benzyl alcohol) is used as a sacrificial reagent, and the method is environmentally friendly and free of pollution. O.sub.2 is used as an oxygen source, sunlight is used as an energy source, and the method is low in energy consumption and high in safety (compared with an industrial anthraquinone method for synthesizing hydrogen peroxide). The method is simple in operation, mild in reaction conditions and high in production of the hydrogen peroxide.

A photothermal catalytic method for production of hydrogen peroxide without a sacrificial reagent on the basis of a porphyrin-based supermolecule is provided. The method includes the following steps: uniformly mixing a porphyrin-based supermolecule photocatalyst with a concentration of 0.3-1.5 g/L with ultrapure water, conducting irradiation with a visible light for a period of time under stirring at a temperature of 40-80° C. and an O.sub.2 flow rate of 50-150 mL/min, and then filtering and concentrating a reaction liquid to obtain an aqueous hydrogen peroxide solution with a high concentration. According to the new photothermal catalytic method for preparing the hydrogen peroxide provided in the present disclosure, no organic solvent (such as ethanol, isopropanol and benzyl alcohol) is used as a sacrificial reagent, and the method is environmentally friendly and free of pollution. O.sub.2 is used as an oxygen source, sunlight is used as an energy source, and the method is low in energy consumption and high in safety (compared with an industrial anthraquinone method for synthesizing hydrogen peroxide). The method is simple in operation, mild in reaction conditions and high in production of the hydrogen peroxide.

The present invention is in the field of a method for obtaining high purity hydrogen peroxide, as well as a production unit for obtaining high purity hydrogen peroxide. It concerns a method for obtaining high purity hydrogen peroxide comprising the steps of providing an open container with an aqueous fluid comprising hydrogen peroxide, putting the open container with the aqueous fluid in a closed space, at ambient conditions providing an inert gas flow over and in contact with the aqueous fluid, removing water from the aqueous fluid at said ambient conditions by said gas flow, and thereby concentrating the hydrogen peroxide. The invention also concern a production unit for use in said method.

The present invention is in the field of a method for obtaining high purity hydrogen peroxide, as well as a production unit for obtaining high purity hydrogen peroxide. It concerns a method for obtaining high purity hydrogen peroxide comprising the steps of providing an open container with an aqueous fluid comprising hydrogen peroxide, putting the open container with the aqueous fluid in a closed space, at ambient conditions providing an inert gas flow over and in contact with the aqueous fluid, removing water from the aqueous fluid at said ambient conditions by said gas flow, and thereby concentrating the hydrogen peroxide. The invention also concern a production unit for use in said method.

A process for the purification of an aqueous hydrogen peroxide solution includes the following steps: (a) the treatment of an aqueous hydrogen peroxide solution with at least one first reverse osmosis system, (b) the treatment of the obtained hydrogen peroxide solution with at least one first stabilizer, (c) the treatment of the obtained hydrogen peroxide solution with at least one purification mean selected from adsorption resins, ion exchange resins, and combinations thereof.

An aqueous hydrogen peroxide solution obtainable thereby is described. The use of the aqueous hydrogen peroxide solution in the manufacture of microelectronic components and semiconductors is also described.

A process for the purification of an aqueous hydrogen peroxide solution includes the following steps: (a) the treatment of an aqueous hydrogen peroxide solution with at least one first reverse osmosis system, (b) the treatment of the obtained hydrogen peroxide solution with at least one first stabilizer, (c) the treatment of the obtained hydrogen peroxide solution with at least one purification mean selected from adsorption resins, ion exchange resins, and combinations thereof.

An aqueous hydrogen peroxide solution obtainable thereby is described. The use of the aqueous hydrogen peroxide solution in the manufacture of microelectronic components and semiconductors is also described.