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Method for producing anion exchange resin, anion exchange resin, method for producing cation exchange resin, cation exchange resin, mixed bed resin, and method for producing ultra-pure water for cleaning electronic parts/or materials

A technology of cation exchange and exchange resin, applied in cation exchange materials, ion exchange water/sewage treatment, anion exchange, etc.

Active Publication Date: 2013-03-13
KURITA WATER INDUSTRIES LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this document refers only to a technique for preventing entanglement, and is not an improved technique for producing an ion exchange resin that suppresses the influence on the surface flatness of a silicon wafer.

Method used

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  • Method for producing anion exchange resin, anion exchange resin, method for producing cation exchange resin, cation exchange resin, mixed bed resin, and method for producing ultra-pure water for cleaning electronic parts/or materials
  • Method for producing anion exchange resin, anion exchange resin, method for producing cation exchange resin, cation exchange resin, mixed bed resin, and method for producing ultra-pure water for cleaning electronic parts/or materials
  • Method for producing anion exchange resin, anion exchange resin, method for producing cation exchange resin, cation exchange resin, mixed bed resin, and method for producing ultra-pure water for cleaning electronic parts/or materials

Examples

Experimental program
Comparison scheme
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preparation example Construction

[0176] Specific methods for preparing the deoxidizing monomer include a method of bubbling the monomer with an inert gas, a method of membrane degassing, a method of circulating an inert gas to the upper gas phase of the monomer storage tank, and a column using a silica gel or the like. The method of processing. Alternatively, a commercially available deoxygenating monomer can also be used. Among them, the method of bubbling the monomer with an inert gas is preferable, and the inert gas used in this case is preferably nitrogen, carbon dioxide, or argon. In addition, deoxygenated monomers are stored in an inert gas atmosphere.

[0177] The amount of the deoxygenating monomer added is usually 10% by weight or more, preferably 50% by weight or more, more preferably 80% by weight or more, based on the total amount of the monomer mixture. When the amount of deoxygenated monomer added is too small, insufficiently polymerized oligomer components (dimers, trimers, oligomers), free p...

experiment example A

[0444] [Experimental example A: Experimental example showing the effect of the anion exchange resin of the first aspect of the present invention]

Embodiment 1

[0446] 590g of styrene (industrial grade, manufactured by Idemitsu Corporation) and 85g (8% by weight relative to the total monomer amount) of divinylbenzene (industrial grade, purity 63% by weight, non-polymerizable impurity content 0.09% by weight, Dow Co., Ltd.), and nitrogen gas was passed through the monomer mixture at 1 L / min for 1 hour to prepare a deoxygenated monomer mixture with an oxygen concentration of 1 mg / L. 1.8 g of dibenzoyl peroxide (purity 75% by weight, wet product, manufactured by NOF), 1.4 g of tert-butyl peroxybenzoate (purity 99% by weight, manufactured by NOF) were mixed with this mixture, and Suspended in 2025 g of 0.1% polyvinyl alcohol (for industrial use, manufactured by Nippon Synthetic Chemicals Co., Ltd., grade GH-20) aqueous solution. While stirring the suspension, it was kept at 80° C. for 5 hours, and then reacted at 120° C. for 4 hours to obtain a crosslinked copolymer.

[0447] The obtained crosslinked copolymer was subjected to a dissolut...

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Abstract

Disclosed is a method for producing an anion exchange resin comprising the steps (1-a)-(1-e) below, wherein residual impurities and formation of decomposed products are suppressed and dissolution of amaterial is also suppressed. (1-a) a step for obtaining a crosslinked copolymer by copolymerizing a monovinyl aromatic monomer and a crosslinkable aromatic monomer (1-b) a step for setting the content of a specific dissolvable compound to 400 ¢mu!g or less per 1 g of the crosslinked copolymer (1-c) a step for introducing 80% by mole or less of a haloalkyl group relative to the monovinyl aromaticmonomer by haloalkylating the crosslinked copolymer (1-d) a step for removing the specific dissolvable compound from the haloalkylated crosslinked copolymer (1-e) a step for reacting the haloalkylatedcrosslinked copolymer with an amine compound. The present invention also relates to a method of producing an anion exchange resin, an cation exchange resin and a method of producing an cation exchange resin, a mixed bed resin and ultra-pure water for cleaning electronic device and / or material.

Description

technical field [0001] The present invention relates to an anion exchange resin with less elution, a method for producing the same, a mixed bed resin using the anion exchange resin, and a method for producing ultrapure water for cleaning electronic components and / or materials. [0002] The present invention also relates to a cation exchange resin with less leached matter, a method for producing the same, a mixed bed resin using the cation exchange resin, and a method for producing ultrapure water for cleaning electronic components and / or materials. Background technique [0003] Conventionally, ion exchange resins have been used not only for water purification, but also in a wide range of industrial fields such as medicine, food, and chemical industry. In general, ion exchange resins can be classified into anion exchange resins and cation exchange resins, each having a chemical structure in which anion exchange groups or cation exchange groups are introduced into a crosslinke...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J41/14B01J39/20C02F1/42C08F8/24C08F8/32
Inventor 福井长雄水庭哲夫德永和彦安冨雅子
Owner KURITA WATER INDUSTRIES LTD
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