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Method for preparing high-purity strontium salt

A strontium salt, high-purity technology, applied in the field of high-purity strontium salt preparation, can solve the problems of small-scale production enterprises, low technical level, and single product, and achieve the effect of low cost, high purity, and uniform particles

Inactive Publication Date: 2017-07-07
吴礼秀
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

my country is rich in strontium ore resources, mainly distributed in Chongqing, Sichuan, Qinghai and other places, but its mining technology is relatively backward, the utilization rate is low, the scale of production enterprises is small, the technical level is low, and the products produced are single, etc.

Method used

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Examples

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Effect test

preparation example Construction

[0017] A method for preparing high-purity strontium salt, comprising the steps of:

[0018] Put the high-purity strontium salt solution in an ultrasonic water bath, add a dispersant, and stir to dissolve the dispersant;

[0019] Add appropriate amount of NH 4 HCO 3 The solution was added dropwise to SrCl 2 solution, while adjusting the pH value with ammonia water to ensure a large amount of CO 3 2- exists so that Sr 2+ fully converted;

[0020] Suction filtration while it is hot, wash with distilled water and absolute ethanol several times in sequence, and jointly detect the filtrate with nitric acid and silver nitrate until there is no chloride ion in the filtrate;

[0021] The product is dried in a drying oven to obtain strontium carbonate powder.

Embodiment 1

[0023] Put 90% high-purity strontium salt solution in an ultrasonic water bath at 50°C, add 6.23g of dispersant, stir for 1 hour to dissolve the dispersant; filter while hot, wash with 100mL distilled water and 50mL absolute ethanol several times in sequence, The filtrate was tested jointly with nitric acid and silver nitrate until there was no chloride ion in the filtrate; the product was placed in a drying oven at 100°C and dried for 24 hours to obtain strontium carbonate powder.

Embodiment 2

[0025] Put the 93% high-purity strontium salt solution in an ultrasonic water bath at 60°C, add 6.78g of dispersant, stir for 2 hours to dissolve the dispersant; filter while hot, wash with 120mL distilled water and 75mL absolute ethanol several times in sequence, The filtrate was tested jointly with nitric acid and silver nitrate until there was no chloride ion in the filtrate; the product was placed in a drying oven at 110°C and dried for 28 hours to obtain strontium carbonate powder.

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Abstract

The invention relates to a preparation method of high-purity strontium salt, comprising the following steps: placing the high-purity strontium salt solution in an ultrasonic water bath, adding a dispersant, and stirring to dissolve the dispersant; adding an appropriate amount of NH4HCO3 solution dropwise into the SrCl2 solution, At the same time, adjust the pH value with ammonia water to ensure the presence of a large amount of CO32-, so that the Sr2+ conversion is complete; while it is hot, it is suction filtered, washed with distilled water and absolute ethanol several times in turn, and the filtrate is jointly detected with nitric acid and silver nitrate until there is no Sr2+ in the filtrate. Chloride ions; the product is placed in a drying oven to dry to obtain strontium carbonate powder. The method of the invention is simple, low in cost and easy to realize, and the prepared strontium carbonate powder has uniform particles and high purity.

Description

technical field [0001] The invention relates to a preparation technology of strontium salt, in particular to a preparation method of high-purity strontium salt. Background technique [0002] my country began to industrially produce strontium salts in the 1970s. Since the beginning of the 21st century, the requirements for strontium salts have gradually increased, and large-scale, refined, and specialized production has begun, and the demand for strontium salts has also continued to upgrade. Since the raw material for preparing strontium salt is mainly celestite, which is a rare mineral resource and is non-renewable. my country is rich in strontium ore resources, mainly distributed in Chongqing, Sichuan, Qinghai and other places, but its mining technology is relatively backward, the utilization rate is low, the scale of production enterprises is small, the technical level is low, and the products produced are single. Therefore, it is imminent to improve the production proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18
CPCC01F11/187C01P2006/80
Inventor 吴礼秀
Owner 吴礼秀
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