Method for producing metal hydroxide fine particle

一种氢氧化物、细粒的技术，应用在稀土金属氧化物/氢氧化物、氧化物/氢氧化物制备、氢氧化镁等方向，能够解决高成本等问题，达到小粒度、有利结晶性的效果

Inactive Publication Date: 2011-10-12
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, halogen-based flame retardants have many environmental problems, such as halogen gas from combustion, generation of black smoke, and generation of dioxins during incineration
In addition, flame retardants of the phosphorus series also have environmental problems such as generation of phosphine gas, and additionally have problems such as high cost and concern for the supply of phosphate rock as a raw material

Method used

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  • Method for producing metal hydroxide fine particle
  • Method for producing metal hydroxide fine particle
  • Method for producing metal hydroxide fine particle

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preparation example Construction

[0067]

[0068] Next, referring to an embodiment of the method for producing metal hydroxide fine particles according to the present invention, the case of producing magnesium hydroxide from a sodium hydroxide solution and a magnesium chloride solution will be described as an example.

[0069] in reference figure 1 In the case of explanation, a mixed solution of a magnesium chloride solution and a silane coupling agent (3-aminopropyltrimethoxysilane) is supplied to the flow path 126 , and a sodium hydroxide solution is supplied to the flow path 124 . The solutions supplied to the flow path 126 and the flow path 124 are mixed in the mixing portion 128 and discharged to the outside of the microreactor through the perforation 130 as a discharge flow path. Thus, a reaction is induced in the mixing portion 128 and the perforations 130, thereby providing a slurry of magnesium hydroxide.

[0070] Next, the method for producing metal hydroxide fine particles according to the presen...

Embodiment 1-1

[0093] In a microreactor, at room temperature, an aqueous solution of magnesium chloride preadjusted to 0.5 mol / L and hydrogen adjusted to 3 mol / L were mixed with 3.2 mol% of 3-aminopropyltrimethoxysilane relative to magnesium ions. The sodium oxide aqueous solutions were mixed with each other at flow ratios of 200 cc / min and 100 cc / min, respectively, to obtain slurries of magnesium hydroxide. The resulting slurry was purified by washing with water until the salt concentration reached 0.00%, thereby providing a dispersion of magnesium hydroxide fine particles in water. The resulting dispersion in water to which 3-aminopropyltrimethoxysilane was added at 10% by weight relative to the magnesium hydroxide particles was heated at 120° C. for 2 hours while stirring, dried, and then redispersed to obtain hydrogen Magnesium Oxide a.

Embodiment 1-2

[0095] In a microreactor, at room temperature, an aqueous magnesium chloride solution adjusted to 0.5 mol / L and hydrogen adjusted to 3 mol / L were mixed with 6.5 mol % of 3-aminopropyltrimethoxysilane relative to magnesium ions. The sodium oxide aqueous solutions were mixed with each other at flow ratios of 200 cc / min and 100 cc / min, respectively, to obtain slurries of magnesium hydroxide. The resulting slurry was purified by washing with water until the salt concentration reached 0.00%, thereby providing a dispersion of magnesium hydroxide fine particles in water. The resulting dispersion in water to which 3-aminopropyltrimethoxysilane was added at 10% by weight relative to the magnesium hydroxide particles was heated at 120° C. for 2 hours while stirring, dried, and then redispersed to obtain hydrogen Magnesium oxide b.

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Abstract

An object of the present invention is to provide a method for producing a metal hydroxide fine particle, which can produce metal hydroxide fine particles with favorable crystallinity and small particle sizes. The present invention provides a method for producing a metal hydroxide fine particle by reacting a metal ion with a hydroxide ion in a solvent, which includes a mixing and reacting step of supplying the metal ion, the hydroxide ion, and a silane coupling agent to a reaction field 128 to mix and react the ions.

Description

technical field [0001] The present invention relates to a method for producing metal hydroxide fine particles, and more particularly, to a method for producing metal hydroxide fine particles that allows control of crystallinity and particle size. Background technique [0002] In general, polymer materials, thermoplastic resins have been used as materials in a wide range of fields such as electric and electronic device parts and materials for chassis. When polymer materials are used for exterior materials of office automation equipment such as televisions and personal computers, the polymer materials require flame retardancy in terms of safety. [0003] As a method for providing flame retardancy to polymer materials, addition of flame retardants to polymer materials has been performed. Typical flame retardants include halogen series, phosphorus series and inorganic particle series flame retardants. However, halogen-based flame retardants have many environmental problems, su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B13/14C01B13/36C01F17/229
CPCB82Y30/00C01B13/36C01F5/22C01F11/02C01P2004/64C09K21/02C01F17/229
Inventor 三好良幸小池诚市川靖典
Owner FUJIFILM CORP
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