Method for preparing Ba(OH)2.8H2O

A 2.8H2O, solid-liquid separation technology, applied in the direction of calcium/strontium/barium oxide/hydroxide, etc., can solve the problems of high energy consumption and high cost, and achieve the effect of low energy consumption and low cost

Inactive Publication Date: 2010-07-14
GUIZHOU REDSTAR DEVING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As the parent material and plastic additive of various high-purity barium salt products, Ba(OH) 2 ·8H 2 O has been widely used, and the traditional production process is barium carbonate pyrolysis method, which consumes a lot of energy and costs high

Method used

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  • Method for preparing Ba(OH)2.8H2O
  • Method for preparing Ba(OH)2.8H2O

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Will be taken from Guizhou Red Star Development Co., Ltd. [Ba 2+ ]0.83mol / L of Ba(HS) 2 Solution 4000ml is placed in the 5000ml beaker, adds 984g manganese oxide ore powder (MnO 2 38.7%, Fe8.6%), control the reaction temperature in the range of 70±5°C, close the stirring reaction for 1.5 hours, stop stirring, keep warm and settle for 30 minutes, absorb the supernatant with a latex tube, add 1000ml hot deionization to the original beaker After dilution with water, suction filter with insulation leak head, and prepare MnSO from the filter residue 4 , and the combined filtrates were sealed and cooled to 35°C.

[0014] The above solution is separated by suction filtration, and the filtrate reclaims barium carbonate and sulfur, and the crude Ba(OH) 2 ·8H 2 O press [Ba 2+ ] 2.0mol / L ingredients were heated and dissolved with deionized water, and 27.5% H was added at a ratio of 3.5ml / L 2 o 2 Sulfur removal. Heat to boil and maintain boiling for 15 minutes, then filter...

Embodiment 2

[0017] Will be taken from Guizhou Red Star Development Co., Ltd. [Ba 2+ ]0.70mol / L of Ba(HS) 2 Solution 4000ml is placed in the 5000ml beaker, adds 1232g manganese oxide ore powder (MnO 2 25.1%, Fe7.8%), control the reaction temperature within the range of 65±5°C, and react with airtight stirring for 2.0 hours, stop stirring, keep warm and settle for 1 hour, siphon the upper part of the clear night with a latex tube, add 1000ml hot deionized water, and use a heat preservation Separation by funnel suction filtration, preparation of MnSO from filter residue 4 , and the combined filtrates were sealed and cooled to 32°C.

[0018] The above solution was separated by suction filtration, and the filtrate recovered BaCO 3 With sulfur, crude Ba(OH) 2 ·8H 2 O press [Ba 2+ ]2.2mol / L was heated and dissolved in deionized water, and 27.5% H was added at a ratio of 3.0ml / L 2 o 2 Remove sulfur, heat to boil, maintain slight boiling for 15 minutes, then filter with slow qualitative f...

Embodiment 3

[0021] Will be taken from Guizhou Red Star Development Co., Ltd. [Ba 2+ ]1.0mol / L of Ba(HS) 2 Solution 4000ml is placed in the 5000ml beaker, adds 1232g manganese oxide ore powder (MnO 2 25.1%, Fe 7.8%), control the reaction temperature within the range of 85±5°C, and react with airtight stirring for 2.0 hours, stop stirring, keep warm and settle for 1 hour, use a latex tube to siphon the upper part to clear the night, add 1000ml hot deionized water, and use a heat preservation funnel Separation by suction filtration, preparation of MnSO from filter residue 4 , and the combined filtrates were sealed and cooled to 30°C.

[0022] The above solution was separated by suction filtration, and the filtrate recovered BaCO 3 With sulfur, crude Ba(OH) 2 ·8H 2 O press [Ba 2+ ]2.5mol / L was heated and dissolved in deionized water, and 27.5% H was added at a ratio of 3.0ml / L 2 o 2 Remove sulfur, heat to boil, maintain slight boiling for 15 minutes, then filter with slow qualitative...

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Abstract

The invention relates to a method for preparing Ba(OH)2.8H2O, comprising the following steps: reacting Ba(HS)2 solution with [Ba2+] of 0.70-1.5mol/L with manganese oxide mineral powder, controlling the temperature of the reaction system between 60 DEG C and 90 DEG C and the reaction time between 1h and 2.5h and ensuring solid-liquid separation after reaction; hermetically cooling the obtained liquid phase to 30-40 DEG C to carry out solid-liquid separation to obtain the solid phase; dissolving the solid phase, namely coarse Ba(OH)2.8H2O, with deionized water according to an accessory with [Ba2+] of 1.5-3.0mol/L, proportionally adding H2O2 according to 3-8ml/L, heating to boil the mixture and ensuring solid-liquid separation after keeping slight boiling for 15-30min to obtain the filtrate; carrying out cooling crystallization on the filtrate to 35-45 DEG C and then carrying out separation, and drying the solid phase to obtain the Ba(OH)2.8H2O product. Compared with the existing pyrolysis technology, the production technology of the invention is low in energy consumption and low in cost.

Description

technical field [0001] The present invention relates to a kind of Ba(OH) 2 ·8H 2 The preparation method of O, especially relates to a kind of utilization Ba(HS) 2 solution to prepare Ba(OH) 2 ·8H 2 O's method. Background technique [0002] As the parent material and plastic additive of various high-purity barium salt products, Ba(OH) 2 ·8H 2 O is widely used, and the traditional production process is barium carbonate pyrolysis method, which consumes a lot of energy and has high cost. [0003] The main metal impurity contained in manganese dioxide ore powder is iron, so the content of manganese and iron in manganese dioxide ore powder should be calculated first when adding materials. The content of other metals is very low relative to the content of manganese and can be ignored. [0004] Red Star Co., Ltd. has been using barite ore to reduce carbon at high temperature to form barium sulfide clinker, and leaching in hot water to obtain a barium sulfide solution. The sol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/02
Inventor 姜志光华东
Owner GUIZHOU REDSTAR DEVING
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