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Production method for alkali metal iodide or alkaline earth iodide

A technology for alkali metal iodide and alkali metal compound, which is applied in the field of preparing alkali metal iodide or alkaline earth metal iodide, and can solve problems such as lithium iodide that cannot be made into powder.

Active Publication Date: 2015-06-10
NIPPON CHEMICALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In addition, the solid lithium iodide sold on the market is generally made by pressing lithium iodide in a trihydrate state into a sheet using a roller (non-patent document 1), but this method cannot produce powdered iodide lithium
[0006] In addition, the use of strontium iodide in the field of electronic materials is still under study

Method used

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  • Production method for alkali metal iodide or alkaline earth iodide
  • Production method for alkali metal iodide or alkaline earth iodide
  • Production method for alkali metal iodide or alkaline earth iodide

Examples

Experimental program
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Effect test

Embodiment 1

[0095] Lithium iodide aqueous solution was produced according to the production example. 5L capacity and inner diameter are prepared in advance × A container with a depth of 160 mm, and a crushing type concentration dryer (manufactured by Mie Daishi, Shinagawa Kogyo) equipped with a revolving wing (rotating in the container), a kneading wing, and a crushing wing. Among them, the revolving blade is a rotary blade for scraping off the solidified matter adhering to the inside of the container, the kneading blade is a rotary blade with a shearing force, and the crushing blade is a rotary blade for pulverizing the solidified matter. 4.0 kg of the produced lithium iodide aqueous solution was dropped into the container of the crushing type concentration dryer. When concentrating, it is 26rpm that the rotational speed of the revolving wing is set, and the rotational speed of the mixing wing is 45rpm, and the rotational speed of the pulverizing wing is 2000rpm; when drying, the rotat...

Embodiment 2

[0098] Lithium iodide aqueous solution was produced according to the production example. Prepare a thin-film evaporator with a cylindrical container (inner heat transfer area 0.14㎡, diameter 150mm, height 300mm), equipped with a rotating movable blade wing (in this container, it can scrape off the inside of the container (heat transfer surface) Cured product) thin-film evaporative dryer (advanced evaporator, manufactured by Sakura Seisakusho). The movable blade wings can evenly disperse the temperature on the heat transfer surface and apply the treatment liquid on the heat transfer surface to evaporate the solvent, and knock off the solidified matter attached to the heat transfer surface for pulverization. Under the condition of 240°C / 14kPa, set the rotation speed of the blade to 1200rpm, and the liquid delivery flow rate to 5L / h, and use the thin-film evaporative dryer to dry the generated 2.3kg lithium iodide aqueous solution for 20 minutes , to obtain powdery crystals (rem...

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Abstract

The invention provides a production method for powder-like alkali metal iodide or alkaline earth iodide in industry. An alkali metal iodide solution, an alkaline earth iodide solution, an alkali metal iodide turbid liquid or an alkaline earth iodide turbid liquid are prepared by solving the alkali metal iodide or alkaline earth iodide or suspending the alkali metal iodide or alkaline earth iodide in a solvent, and the alkali metal iodide or alkaline earth iodide are smashed while removing the solvent of the solution or the turbid liquid.

Description

technical field [0001] The present invention relates to a method for preparing alkali metal iodide or alkaline earth metal iodide. Background technique [0002] For various reaction reagents or additives, etc., alkali metal iodide or alkaline earth metal iodide is a very useful compound. [0003] Lithium iodide can be used in the production process of acetic acid as a cocatalyst in addition to being used in the absorption liquid of the absorption refrigerator. In addition, the use of lithium iodide in the fields of secondary lithium batteries, dye-sensitized solar cells, organic EL and other electronic materials is also under active research and development. [0004] In general, solid lithium iodide has the following production methods: the lithium iodide solution is concentrated until a predetermined amount of water is left, then placed in an evaporation vessel, and then cooled in a desiccator; The method of its anhydrous (non-patent document 1); the method in which the l...

Claims

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Application Information

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IPC IPC(8): C01B9/06
CPCC01B9/06
Inventor 藤原直树大高佑介原口由生小仓尚人塩满沙耶加
Owner NIPPON CHEMICALS CO LTD
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