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Rod-like magnesium hydroxide particle and rod-like magnesium oxide particle each having high specific surface area, and methods respectively for producing said particles

A technology of magnesium oxide particles and magnesium hydroxide, applied in magnesium hydroxide, magnesium oxide and other directions, can solve the problems of low reactivity, low specific surface area, mixed and other problems, and achieve the effect of easy production

Active Publication Date: 2015-10-28
TATEHO CHEM IND CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the method described in Patent Document 1 cannot stably form spherical magnesium hydroxide, and plate-shaped and columnar magnesium hydroxide will be mixed. Such magnesium hydroxide particles have insufficient dispersibility to resins, etc., and are used in catalysts. When isochronous, there are problems such as low specific surface area and low reactivity

Method used

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  • Rod-like magnesium hydroxide particle and rod-like magnesium oxide particle each having high specific surface area, and methods respectively for producing said particles
  • Rod-like magnesium hydroxide particle and rod-like magnesium oxide particle each having high specific surface area, and methods respectively for producing said particles
  • Rod-like magnesium hydroxide particle and rod-like magnesium oxide particle each having high specific surface area, and methods respectively for producing said particles

Examples

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Effect test

Embodiment 1

[0097] 50% particle size (D 50 ) is 1.12μm, and the specific surface area is 10.64m 2 / g of magnesium oxide is placed in a constant temperature and humidity machine with a temperature of 80°C and a humidity of 90% for 3 hours to partially hydrate the surface and obtain a specific surface area of ​​13.46m 2 Partially hydrated acicular magnesia / g, Ig-loss is 9.08%, wherein, described magnesia is the acicular magnesium carbonate that will make magnesium sulfate solution and sodium carbonate react and make under calcination temperature 1200 ℃. made by calcination.

[0098] 0.5% by mass of aluminum chloride in terms of metal elements was added to an ion-exchange aqueous solution containing 0.5% by mass of zinc oxide in terms of metal elements and 1 liter of ion-exchanged water relative to the partially hydrated acicular magnesium oxide used in the reaction - Hexahydrate and 0.02 mol of propionic acid with respect to 100 g of partially hydrated acicular magnesia to prepare a react...

Embodiment 2

[0101] Except having used aluminum sulfate instead of aluminum chloride, it carried out similarly to Example 1.

Embodiment 3

[0103] Place needle-shaped magnesium oxide in a constant temperature and humidity machine with a temperature of 60°C and a humidity of 90% for 12 hours to partially hydrate the surface and set the specific surface area to 10.18m 2 / g and Ig-loss were set to 21.42%, and it carried out similarly to Example 1.

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Abstract

Provided are: a magnesium hydroxide particle and a magnesium oxide particle, each of which has a high specific surface area; and methods respectively for producing the particles. A magnesium hydroxide particle and a magnesium oxide particle, each of which has a rod-like shape formed by the aggregation of scale-like primary particles, also has a volume cumulative 50% particle diameter (D50) of 1.0 to 10.0 μm as measured by a laser diffraction scattering particle size distribution measurement method, and also has a specific surface area of 10 m2 / g or more.

Description

technical field [0001] The present invention relates to rod-shaped magnesium hydroxide particles and rod-shaped magnesium oxide particles having a high specific surface area, and their production methods. Background technique [0002] Magnesium hydroxide particles and magnesium oxide particles are used in various fields. Examples of uses of magnesium hydroxide particles include coating agents for inkjet paper, flame retardants, thermal storage materials, catalysts, and electronic materials, and examples of uses of magnesium oxide particles include optical materials, inkjet Paper coating agents, catalysts and electronic materials, etc. [0003] When magnesium hydroxide particles are used in coating agents for inkjet paper, flame retardants, heat storage materials, catalysts, and electronic materials, the following expectations are expected. In the coating agent, magnesium hydroxide particles are required to have OH groups with a high affinity for a large number of OH groups...

Claims

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Application Information

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IPC IPC(8): C01F5/16C01F5/08
CPCC01F5/08C01F5/16C01P2004/10C01P2004/50C01P2004/61C01P2006/12
Inventor 黑田明
Owner TATEHO CHEM IND CO
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