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Preparing method of Sr(0H)2.8H2O

A technology of strontium hydroxide and solution, applied in the direction of calcium/strontium/barium oxide/hydroxide, etc., can solve problems such as lack of competitiveness, and achieve the effect of reducing preparation cost

Inactive Publication Date: 2010-06-30
GUIZHOU REDSTAR DEVING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of liquid crystal display and sensitive ceramics, high-quality SrCO 3 The need also increases, Sr(OH) 2 SrCO synthesized by carbonization 3 It can meet the physical and chemical quality requirements of the above industries. Sr(OH) prepared by traditional hydrochloric acid-liquid caustic route and pyrolysis leaching process route 2 No longer competitive due to cost factors

Method used

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  • Preparing method of Sr(0H)2.8H2O
  • Preparing method of Sr(0H)2.8H2O

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 0.47mol / L of Sr(HS) 2 Solution 4000ml is placed in the 5000ml beaker, adds 752g manganese oxide ore powder (MnO 2 25.1%, Fe 7.8%), heated in an electric furnace and maintained at 70 ° C, sealed and stirred for 2 hours, stopped stirring, after settling, use a latex tube to absorb the supernatant, add 1000ml hot deionized water and stir to wash after the reaction, and then separate by suction filtration , the residue was prepared from MnSO 4 Products, combined filtrates, sealed and cooled to 35 ° C.

[0015] After the above cooling, the solution is suction filtered and separated, and the filtrate is carbonized to recover SrCO 3 , crude Sr(OH) 2 ·8H 2 O according to 0.8mol / L [Sr 2+ ] Add deionized water and heat to dissolve, add 27.5% H at a ratio of 3ml / L 2 o 2 Remove sulfur, heat to boil and maintain boiling for 15 minutes, filter with slow qualitative filter paper, discard the filter residue, and cool the filtrate to 40°C.

[0016] Centrifuge the above cooled so...

Embodiment 2

[0018] 0.55mol / L Sr(HS) 2 Solution 4000ml is placed in the 5000ml beaker, adds 628g manganese oxide ore powder (MnO 2 38.7%, Fe 8.6%), heated in an electric furnace and maintained at a temperature of 80°C, closed reaction for 2 hours, stopped stirring, siphoned the supernatant after settling, added 1000ml hot deionized water to dilute and washed the residue, separated by suction filtration, and prepared the filter residue MnSO 4 , and the combined filtrates were sealed and cooled to 30°C.

[0019] After the above cooling, the solution is suction filtered and separated, and the filtrate is carbonized to recover SrCO 3 , crude Sr(OH) 2 ·8H 2 O by 0.7mol / L [Sr 2+ ] Dissolve with hot deionized water, add 3ml / L 27.5% H 2 o 2 Remove sulfur, heat to boil, and maintain for 25 minutes, filter with slow qualitative filter paper, discard the filter residue, and cool the filtrate to 45°C.

[0020] The above-mentioned cooled solution is centrifuged, and the mother liquor is recycle...

Embodiment 3

[0022] 0.40mol / L Sr(HS) 2 Solution 4000ml is placed in the 5000ml beaker, adds 474g manganese oxide ore powder (MnO 2 38.7%, Fe 8.6%), heated in an electric furnace and maintained at a temperature of 85°C, closed reaction for 2 hours, stopped stirring, siphoned the supernatant after settling, added 1000ml hot deionized water to dilute and washed the residue, separated by suction filtration, and prepared the filter residue MnSO 4 , and the combined filtrates were sealed and cooled to 32°C.

[0023] After the above cooling, the solution is suction filtered and separated, and the filtrate is carbonized to recover SrCO 3 , crude Sr(OH) 2 ·8H 2 O according to 0.7mol / L [Sr 2+ ] Dissolve with hot deionized water, add 3ml / L 27.5% H 2 o 2 Remove sulfur, heat to boil, and maintain for 25 minutes, filter with slow qualitative filter paper, discard the filter residue, and cool the filtrate to 43°C.

[0024] The above-mentioned cooled solution is centrifuged, and the mother liquor ...

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Abstract

The present invention relates to a preparing method of strontium hydroxide. In the method, quantitative manganese oxide powdered ore is added into Sr(HS)2 solution of which the concentration is 0.20 to 0.55 mol / L, and the reaction temperature is maintained within 60 DEG C to 85 DEG C ; the mixture is stirred closely for 1.5 to 3 hours to be separated in a solid-liquid way; filtered liquid is cooled closely to 25 DEG C to 35 DEG C, and is separated in the solid-liquid way to obtain crude Sr(0H)2.8H2O; the obtained solid is dissolved by de-ionized water according to concentration of 0.5 to 0.8 mol / L [Sr2+]; 27.5% of H2O2 is added according to the proportion of 2 to 5mol / L to be heated and boiled for 15 to 30 minutes, and the solution is filtered and separated; the obtained filtered liquid is closely cooled and crystallized to 35 DEG C to 45 DEG C, and is separated in a centrifugal way; and solid is dried to obtain the final product of Sr(0H)2.8H2O. The Sr(HS)2 solution generated by hydrolyzing SrS is extracted twice, which can obtain strontium hydroxide with low cost.

Description

technical field [0001] The present invention relates to a kind of Sr(OH) 2 ·8H 2 The preparation method of O, especially using Sr(HS) 2 to prepare Sr(OH) 2 ·8H 2 O's method. Background technique [0002] With the development of liquid crystal display and sensitive ceramics, high-quality SrCO 3 The need also increases, Sr(OH) 2 SrCO synthesized by carbonization 3 It can meet the physical and chemical quality requirements of the above industries. Sr(OH) prepared by traditional hydrochloric acid-liquid caustic route and pyrolysis leaching process route 2 No longer competitive due to cost factors. [0003] Manganese dioxide ore powder mainly contains manganese and iron, and the content of other metals is very low relative to the content of manganese in industrial production and can be ignored. [0004] The applicant has disclosed the initial extraction of Sr(OH) in the prior patent application number 200910158214.0 2 ·8H 2 O's method, which is quoted in its entirety h...

Claims

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Application Information

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IPC IPC(8): C01F11/02
Inventor 姜志光华东
Owner GUIZHOU REDSTAR DEVING
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