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A kind of method for preparing low strontium hydroxide barium

A technology of barium hydroxide and barium polysulfide, applied in the direction of calcium/strontium/barium oxide/hydroxide, etc., can solve the problem of high process cost, low yield of barium hydroxide fractional crystallization, unable to support industrialized mass production, etc. problem, to achieve the effect of solving the high cost of preparation

Active Publication Date: 2011-12-07
GUIZHOU REDSTAR DEVING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the traditional low-strontium barium hydroxide production method, the cost of the barium chloride method is too high, and the yield of barium hydroxide fractional crystallization is extremely low, neither of which can support the requirements of industrial mass production

Method used

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  • A kind of method for preparing low strontium hydroxide barium
  • A kind of method for preparing low strontium hydroxide barium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Combining barium and manganese from Guizhou Red Star Development Co., Ltd. to crystallize crude Ba(OH) 2 ·8H 2 The remaining barium polysulfide solution is sent into the carbonization tower, and the lime kiln gas is fed into the normal temperature carbonization reaction, and the obtained barium carbonate is flashed and dried after centrifugal separation.

[0031] 2) the above obtained BaCO 3 Calcination is carried out according to the conventional process, the high temperature zone of the tunnel kiln is controlled at 1250°C, the residence time of the material is controlled at 1.5 hours, and the airtight cooling is carried out to 150°C.

[0032] 3) Add deionized water to the stainless steel leaching pot first, raise the temperature to 60°C in advance, and press 200KgBaO / m 3 Add calcined clinker in proportion, add a small amount of industrial hydrogen peroxide under stirring, heat up and boil, maintain slight boiling for about 15 minutes, press filter and separate, a...

Embodiment 2

[0036] 1) Combining barium and manganese from Guizhou Red Star Development Co., Ltd. to crystallize crude Ba(OH) 2 ·8H 2 The remaining barium polysulfide solution is sent into the carbonization tower, and the lime kiln gas is fed into the normal temperature carbonization reaction, and the obtained barium carbonate is flashed and dried after centrifugal separation.

[0037] 2) the above obtained BaCO 3 Calcination is carried out according to the conventional process, the high temperature zone of the tunnel kiln is controlled at 1350°C, the residence time of the material is controlled at 1 hour, and the airtight cooling is carried out to 180°C.

[0038] 3) Add deionized water to the stainless steel leaching pot first, raise the temperature to 70°C in advance, and press 160KgBaO / m 3 Add calcined clinker in proportion, add a small amount of industrial hydrogen peroxide under stirring, heat up and boil, maintain slight boiling for about 15 minutes, press filter and separate, and ...

Embodiment 3

[0042] 1) Combining barium and manganese from Guizhou Red Star Development Co., Ltd. to crystallize crude Ba(OH) 2 ·8H 2 2. The remaining barium polysulfide solution is sent into the carbonization tower, and the lime kiln gas is passed through to carry out the normal temperature carbonization reaction, and the barium carbonate obtained is flashed and dried after centrifugation, and the mother liquor is introduced into the leaching device of step 3), and used Recovery of H by the Claus method 2 S.

[0043] 2) the above obtained BaCO 3 Carry out calcination according to the conventional process, control the high temperature zone of the tunnel kiln at 1298°C, control the residence time of the material at 1 hour and 20 minutes, and cool it to 150°C in an airtight manner, and use the flue gas to recover SO 2 .

[0044] 3) Add deionized water to the stainless steel leaching pot first, raise the temperature to 55°C in advance, and press 350KgBaO / m 3 Add calcined clinker in propo...

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Abstract

A method for preparing low strontium barium hydroxide, including the steps of: crystallizing the barium polysulfide solution remaining after the manganese-barium combination reaction to crystallize the crude product Ba(OH)2·8H2O, carbonizing the remaining barium sulfide solution with lime kiln gas, and separating the resulting carbonic acid The barium is calcined and cooled; the resulting calcined clinker is added to the leaching device for leaching, impurity removal, and separation; the resulting filtrate is subjected to primary crystallization, and the system temperature is controlled between 60-85°C according to different [Ba2+]. After reaching this range, the solution is subjected to secondary cooling and crystallization, and the temperature is controlled to be less than 35°C before separation. The solid obtained is a low-strontium barium hydroxide product. It solves the problems of high preparation cost and low yield of traditional low-strontium barium hydroxide.

Description

technical field [0001] The invention relates to a method for preparing low strontium barium hydroxide. Background technique [0002] Low-strontium barium hydroxide, as the parent material of hydrothermal barium titanate and high-purity barium carbonate with low-strontium large specific surface, has been widely used at home and abroad in recent years, and the market demand is increasing year by year. [0003] In the traditional production method of low-strontium barium hydroxide, the process cost of barium chloride method is too high, and the yield of fractional crystallization of barium hydroxide is extremely low, neither of which can support the requirements of industrial mass production. Contents of the invention [0004] The present invention utilizes the low-strontium polysulfide barium solution after manganese-barium reaction and crystallization of barium hydroxide to carbonize to obtain low-strontium barium carbonate material, and then obtains barium oxide according ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F11/10
Inventor 姜志光华东
Owner GUIZHOU REDSTAR DEVING