Method for preparing high-purity strontium carbonate

A strontium carbonate, high-purity technology, applied in the directions of strontium carbonate, calcium carbonate/strontium/barium, etc., can solve the problems of poor activity, high impurity content, secondary pollution, etc., and achieve low cost, high activity, and low impurities. Effect

Inactive Publication Date: 2016-07-20
TRUSYN CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Technical problem to be solved by the present invention: Aiming at the problems that the traditional method for producing strontium titanate has high impurity content, poor activity, and secondary pollution during the preparation process, a method for immersing calcined celestite in hydrochloric acid, Supplemented with hydrogen peroxide, extract strontium ions,...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0019] First, take 2kg of lapis lazuli and put it into a pulverizer for crushing, pass through a 150-mesh standard sieve, put the obtained lapis lazuli particles into a calcination furnace at 900°C for 40 minutes, and then cool them to room temperature with the furnace, then take out the particles and put them in a into the container, add a hydrochloric acid solution with a mass fraction of 20% to soak the granules, use a stirrer to stir at a speed of 260r / min for 25min; Stir the hydrogen peroxide with a fraction of 20% evenly, then put it into a microwave oven with a power of 650W for 15 minutes, then take out the container, let it stand until no precipitation occurs, then filter, collect the filtrate, add distilled water to it to dilute the solution, and make The pH is 7.0, set aside; then take 200g of lapis lazuli surface soil and put it into a flask filled with 900mL inorganic salt medium, then move the flask to a shaker incubator with a temperature of 30°C and a rotation s...

example 2

[0021]First, take 1 kg of lapis lazuli and put it into a pulverizer for crushing, pass through a 150-mesh standard sieve, put the obtained lapis lazuli particles into a calcination furnace at 800°C for 30 minutes, then cool them to room temperature with the furnace, and then take out the particles and put them in a into the container, add a hydrochloric acid solution with a mass fraction of 20% to soak the granules, use a stirrer to stir at a speed of 260r / min for 20min; filter after the above stirring is completed, collect the filtrate, and add 20% of the mass of the filtrate to it. Stir the hydrogen peroxide with a fraction of 20% evenly, then put it into a microwave oven with a power of 650W for 10 minutes, then take out the container, let it stand until no precipitation occurs, then filter it, collect the filtrate, add distilled water to it to dilute the solution, and make The pH is 7.0, set aside; then take 200g of lapis lazuli surface soil and put it into a flask filled w...

example 3

[0023] First, take 1 kg of lapis lazuli and put it into a pulverizer for crushing, pass through a 150-mesh standard sieve, put the obtained lapis lazuli particles into a calcination furnace at 850°C for 35 minutes, then cool them to room temperature with the furnace, and then take out the particles and put them into a container, add a hydrochloric acid solution with a mass fraction of 20% to soak the granules, use a stirrer to stir at a speed of 260r / min for 22min; Stir the hydrogen peroxide with a fraction of 20% evenly, then put it into a microwave oven with a power of 650W for 12 minutes, then take out the container, let it stand until no precipitation occurs, then filter, collect the filtrate, add distilled water to it to dilute the solution, and make The pH is 7.0, set aside; then take 200g of lapis lazuli surface soil and put it into a flask filled with 850mL inorganic salt medium, then move the flask to a shaker incubator with a temperature of 29°C and a rotation speed o...

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PUM

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Abstract

The invention relates to a method for preparing high-purity strontium carbonate, and belongs to the technical field of preparation of strontium carbonate. The method comprises the steps: firstly, soaking calcined celestite in hydrochloric acid, supplementing with hydrogen peroxide, extracting strontium ions, followed by extracting probiotics in celestite surface soil, screening, culturing, mixing with a strontium ion-containing mixed solution, supplementing with sodium carbonate, under action of probiotics self enzymes, continuously carrying out enzymatic action with surrounding media to generate carbonate ions, and carrying out a reaction with strontium ions to produce strontium carbonate crystals. The prepared strontium carbonate contains low impurity level, has high purity up to more than or equal to 99.5%, has high activity, and cannot produce secondary pollution in the process of preparation.

Description

technical field [0001] The invention relates to a method for preparing high-purity strontium carbonate, belonging to the technical field of strontium carbonate preparation. Background technique [0002] With the rapid development of the electronics industry and information industry, high-purity strontium carbonate, as an important new chemical raw material, is now widely used in green materials—strontium-based luminescent materials, liquid crystal glass substrates, ceramic capacitors, semiconductor capacitors, strontium titanate-based voltage Sensitive resistors, PTC ceramic resistors, high-performance magnetic materials, high-purity strontium manufacturing and other fields. With the continuous emergence of new materials and the continuous improvement of performance, the raw material requirements for high-purity strontium carbonate are also increasing. Purity is gradually developing from 97% in the past to 99.99%. Not only are the requirements for impurity content more and ...

Claims

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Application Information

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IPC IPC(8): C01F11/18
CPCC01F11/187C01P2004/61C01P2006/12C01P2006/80
Inventor 孙春辉薛红娟宋国
Owner TRUSYN CHEM TECH
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