Method for producing less-barium fine strontium salts from celestite

A production method and technology of celestite, applied in the direction of calcium/strontium/barium nitrate, calcium carbonate/strontium/barium, calcium/strontium/barium halide, etc., can solve the problem of high raw material cost, high production cost, and inability to be put into industry. Production and other problems, to achieve the effect of low cost of raw materials

Active Publication Date: 2012-07-25
CHONGQING YUANHE FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The purity of strontium carbonate produced by this method is acceptable, but the cost of raw materials is relatively high, and ammonium nitrate is a dangerous product and the main component of civil explosives, and the control is relatively strict. There is a large safety risk as a raw material for production, and the approval, transportation, and storage of procurement It is also relatively troublesome; so at present, there are only experimental reports in China and cannot be put into industrial production
[0006] The productio...

Method used

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  • Method for producing less-barium fine strontium salts from celestite
  • Method for producing less-barium fine strontium salts from celestite
  • Method for producing less-barium fine strontium salts from celestite

Examples

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Effect test

Embodiment 1

[0046] a, refinement: crush the lapis lazuli and then grind it to pass through a 200-mesh sieve;

[0047]b. Pickling: react with dilute hydrochloric acid with a concentration of 12% and ground lapis lazuli;

[0048] c. Metathesis: add refined lapis lazuli to 10% ammonium carbonate aqueous solution and stir evenly; then under airtight conditions, the reaction pressure is 0.2Mpa, the reaction material temperature is 110±2°C, and the reaction is taken after 5 hours , when the strontium carbonate content of the solid part in the material is 81%, stop heating, after filtering, the gained solid is washed with clear water to obtain the strontium carbonate crude product;

[0049] e: react the strontium carbonate crude product with nitric acid, control the pH value of the reaction end point to be 3, and obtain a strontium nitrate solution with a concentration of 30Be;

[0050] f: Add 3 liters / cubic hydrogen peroxide and 2 kg / cubic activated carbon to the strontium nitrate solution, ad...

Embodiment 2

[0055] a, refinement: crush the lapis lazuli and then grind it to pass through a 200-mesh sieve;

[0056] b. Pickling: react with dilute hydrochloric acid with a concentration of 15% and ground lapis lazuli;

[0057] c. Metathesis: add refined lapis lazuli to 10% ammonium carbonate aqueous solution, and stir evenly; then under airtight conditions, the reaction pressure is 0.26Mpa, the reaction material temperature is 110±2°C, and the reaction is taken after 5 hours , when the strontium carbonate content of the solid part in the material is 78%, stop heating, after filtering, the gained solid is washed to obtain the strontium carbonate crude product;

[0058] e: react the strontium carbonate crude product with nitric acid, control the pH value of the reaction end point to 4.5, and obtain a strontium nitrate solution with a concentration of 35Be;

[0059] f: Add 2 liters / cubic hydrogen peroxide and 1 kg / cubic activated carbon to the strontium nitrate solution, add strontium hyd...

Embodiment 3

[0065] a, refinement: crush the lapis lazuli and then grind it to pass through a 200-mesh sieve;

[0066] b. Pickling: react with dilute hydrochloric acid with a concentration of 10% and ground lapis lazuli;

[0067] c. Metathesis: add refined lapis lazuli to 10% ammonium carbonate aqueous solution, and stir evenly; then under airtight conditions, the reaction pressure is 0.3Mpa, the reaction material temperature is 115±2°C, and the reaction is taken after 5 hours , when the strontium carbonate content of the solid part in the material is 76%, stop heating, after filtering, the gained solid is washed to obtain the strontium carbonate crude product;

[0068] j: reacting the strontium carbonate crude product with hydrochloric acid, controlling the pH value at the end of the reaction to be 4, and obtaining a strontium chloride solution with a concentration of 30Be;

[0069] k: Add 1 liter / cubic hydrogen peroxide with a concentration of 27% and 1.5 kg / cubic activated carbon to th...

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Abstract

The invention mainly aims to provide a method for producing less-barium fine strontium salts from celestite, and the method is low in cost, which comprises the steps: refining: crushing or grinding the celestite to particles of less than 200 mesh; acid washing: reacting diluted hydrochloric acid with the levigated celestite, and removing a carbonate component in the celestite to obtain high-purity refined celestite; and double decomposition: adding the refined celestite to an ammonium carbonate aqueous solution, uniformly stirring, then reacting in an airtight condition at a reaction pressure of 0.2-0.3MPa and a reaction material temperature of 100-115 DEG C, stopping heating after the reaction is finished, filtering and washing obtained solid to obtain a strontium carbonate crude product, and further refining the strontium carbonate crude product to obtain a product. The method has the advantages that during the double decomposition reaction, when reacting with the celestite, ammonium carbonate only reacts with strontium sulfate in the celestite without reacting with barium sulfate, so that the barium content of the obtained strontium carbonate crude product is very low and lower than 0.05%; and the method is low in production cost and has wide market prospect.

Description

technical field [0001] The invention relates to inorganic chemical industry, in particular to a production process of strontium salt. Background technique [0002] Minerals containing strontium mainly include: lapis lazuli: the main components are: strontium sulfate 50-80%, barium sulfate 1-4%, strontium carbonate 5-15%, calcium carbonate 8-15%, calcium sulfate 3-8%, other 5% or so. Strontium: The main component is strontium carbonate with a content of 40-70%. Mixed ore: The main components are strontium sulfate and strontium carbonate, the content of strontium sulfate is 30-45%, and the content of strontium carbonate is 30-40%. [0003] Among them, strontium ore is a secondary ore with few reserves; lapis lazuli is a primary ore with abundant reserves, lower price and wide application. There are also more reserves of mixed ore, but because the composition is more complex than the first two, it is difficult to produce high-purity refined products. Therefore, the producti...

Claims

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Application Information

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IPC IPC(8): C01F11/18C01F11/24C01F11/36
Inventor 王永范
Owner CHONGQING YUANHE FINE CHEM
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