Method for preparing nano strontium carbonate

A nano-carbonic acid, a technology for preparation steps, applied in the directions of strontium carbonate, calcium carbonate/strontium/barium, nanotechnology, etc., can solve the problems of high impurity content of strontium carbonate, high production cost, large particle size, etc., and achieves reduced production cost, The effect of small particle size and simple preparation steps

Active Publication Date: 2016-11-16
重庆庆龙新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention: aiming at the disadvantages of high impurity content, poor activity, large particle size and high production cost of strontium carbonate obtained by the current method, a kind of celestite is provided as raw material, after pulverization, with excessive Dissolve dilute sulfuric acid to remove the calcium carbonate component, then dissolve strontium sulfate with dilute hydrochloric acid, filter to remove insoluble matter such as barium sulfate, and then mix the obtained strontium chloride solution with self-cu...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] First weigh 80kg of lapis lazuli, pulverize it with a universal pulverizer for 15 minutes, pass through a 150-mesh sieve to obtain fine lapis lazuli powder, then transfer it to 160 mL of sulfuric acid with a mass concentration of 2%, and stir with a magnetic stirrer at 200 r / min 20min, filter to get the filter residue, wash the filter residue with deionized water 3 times, and dry for 2h to get the pretreated lapis lazuli powder; Stir at 300r / min for 30min, filter to obtain the filtrate, and set aside; then weigh 8g of beef extract, 3g of peptone, 3g of potassium chloride, 0.5g of calcium chloride, 1g of magnesium sulfate and 15g of agar, dissolve them in 1L of deionized water, and use The mass concentration is 12% ammonia water to adjust the pH to 8.0, then transfer the mixture to a pressure steam sterilizer, and sterilize it under the condition of 0.06MPa for 30 minutes to obtain a culture medium; weigh 50g of the surface soil of lapis lazuli, and spread it evenly on th...

example 2

[0019]First weigh 115kg of lapis lazuli, crush it with a universal pulverizer for 18 minutes, pass through a 175-mesh sieve to obtain fine lapis lazuli powder, then transfer it to 180 mL of sulfuric acid with a mass concentration of 3%, and stir with a magnetic stirrer at 300 r / min 25min, filter to get the filter residue, wash the filter residue with deionized water 4 times, dry for 3h, and get the pretreated celestite powder; Stir at 400r / min for 35min, filter to obtain the filtrate, and set aside; then weigh 9g of beef extract, 4g of peptone, 4g of potassium chloride, 0.7g of calcium chloride, 2g of magnesium sulfate and 18g of agar, dissolve them in 2L of deionized water, and use The mass concentration is 13% ammonia water to adjust the pH to 8.3, then transfer the mixture to a pressure steam sterilizer, and sterilize it for 35 minutes under the condition of 0.07MPa to obtain a culture medium; weigh 55g of the surface soil of lapis lazuli, and spread it evenly on In the abo...

example 3

[0021] First, weigh 150kg of lapis lazuli, pulverize it with a universal pulverizer for 20 minutes, and pass through a 200-mesh sieve to obtain fine lapis lazuli powder, then transfer it to 200 mL of sulfuric acid with a mass concentration of 5%, and stir it with a magnetic stirrer at 400 r / min 30min, filter to get the filter residue, wash the filter residue with deionized water for 5 times, and dry for 3h to get the pretreated lapis lazuli powder; Stir at 500r / min for 40min, filter to obtain the filtrate, and set aside; then weigh 10g of beef extract, 5g of peptone, 5g of potassium chloride, 0.8g of calcium chloride, 2g of magnesium sulfate and 20g of agar, dissolve them in 2L of deionized water, and use The mass concentration is 15% ammonia water to adjust the pH to 8.6, then transfer the mixture to a pressure steam sterilizer, and sterilize it under the condition of 0.08MPa for 40 minutes to obtain the culture medium; weigh 60g of the surface soil of lapis lazuli, and spread...

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PUM

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Abstract

The invention discloses a method for preparing nano strontium carbonate and belongs to the technical field of strontium carbonate preparation. Celestite serves as the raw material and is smashed and then dissolved with an excessive amount of diluted sulphuric acid to move calcium carbonate therein, then strontium sulfate in the celestite is dissolved with diluted hydrochloric acid, filtering is conducted to remove insoluble substances like barium sulfate, then the obtained strontium chloride solution is mixed with automatically cultured microorganism colonies on the surface of the celestite, and organic matter, with negative charges, on the surface of microorganism cell surfaces is chelated with strontium ions in the solution; urea serves as the carbon source of microorganisms, the urea is continuously decomposed so that the concentration of carbanions in the solution around the microorganisms can be increased continuously, accordingly the concentration of part of carbanions and strontium ions in the solution is increased, the carbanions and the strontium ions are combined into strontium carbonate crystal precipitate, and then the precipitate is filtered and dried to obtain the nano strontium carbonate. The method has the advantages that preparation steps are simple, the impurity content of the obtained product is reduced by 70-80%, and activity is improved by 25-30%.

Description

technical field [0001] The invention relates to a preparation method of nano strontium carbonate, which belongs to the technical field of strontium carbonate preparation. Background technique [0002] Strontium carbonate, white powder or granules, odorless and tasteless. Mainly used in glass shell glass, magnetic materials, metal smelting, strontium salt preparation, electronic components, fireworks. It is used in the manufacture of color TV cathode ray tubes, electromagnets, strontium ferrite, pyrotechnics, fluorescent glass, signal flares, etc. It is also a raw material for the production of other strontium salts, and is used as a special PTC thermistor element (switch start, degaussing, current limiting protection, The basic powder produced by constant temperature heating, etc.) is the basic raw material for the production of strontium salt. As a carrier of palladium, it can be used for hydrogenation. In addition, it is also used in the production of pyrotechnics, fluo...

Claims

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Application Information

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IPC IPC(8): C01F11/18B82Y30/00
CPCC01F11/187C01P2002/60C01P2006/10C01P2006/12C01P2006/80
Inventor 梅庆波盛海丰许博伟
Owner 重庆庆龙新材料科技有限公司
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