Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing Ba(OH)2.8H2O

A liquid phase, manganese dioxide ore technology, applied in the direction of calcium/strontium/barium oxide/hydroxide, etc., can solve the problems of staying in the laboratory stage, separation and removal difficulties, and achieve low cost, low energy consumption, and high-quality products The effect of stable quality

Inactive Publication Date: 2010-07-14
GUIZHOU REDSTAR DEVING
View PDF1 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This means that the manganese oxide is excessive (because the manganese oxide ore also has iron impurities), which makes it difficult for subsequent separation and removal
Also, according to the description of Example 5 of this publication, what it uses is pure manganese dioxide as a raw material, so the technical scheme of the above publication only stays in the laboratory stage, and it is impossible in the actual industrialized production of barium hydroxide of

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing Ba(OH)2.8H2O
  • Method for preparing Ba(OH)2.8H2O

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Put 4000ml of 195g / L BaS solution in a 5000ml beaker, add 631g of manganese oxide ore powder (MnO 2 34%, Fe 12.7%), the electric furnace is heated and kept at 65°C, and the reaction is sealed for 1 hour. After stirring is stopped, solid-liquid separation is carried out. The filter residue is rinsed with a small amount of hot deionized water, and the filtrate is sealed and cooled to 32°C for crystallization.

[0015] After the above cooling and crystallization, the system is suction filtered to obtain crude Ba(OH) 2 ·8H 2 O solid. Ba(OH) 2 ·8H 2 O according to 2.0mol / L[Ba 2+ ] The concentration is dissolved in deionized water, and 5ml / L 27.5 wt% H is added 2 O 2 Remove sulfur, boil at elevated temperature and maintain a slight boiling for 20 minutes, filter with slow speed filter paper, discard the filter residue, collect the filtrate and cool it to 45°C in a sealed manner, separate solid and liquid, and obtain Ba(OH) 2 ·8H 2 O placed in a 65 ℃ blast oven for 4 hours to dry,...

Embodiment 2

[0017] Put 4000ml of 220g / L BaS solution in a 5000ml beaker, add 771g of manganese oxide ore powder (MnO 2 38.7%, Fe 8.6%), maintain the temperature in the range of 85°C, seal the reaction for 1.5 hours and then separate the solid and liquid, rinse the filter residue with a small amount of hot deionized water, collect the filtrate and cool it to 30°C in a closed manner, separate by suction filtration, and carbonize the filtrate to recover BaCO 3 , The resulting crude Ba(OH) 2 ·8H 2 O press 2.5mol / L[Ba 2+ ] The concentration is dissolved in deionized water, and 27.5 wt% H is added at the ratio of 7ml / L 2 O 2 Desulfurize, heat and boil for 15 minutes, filter hot with slow filter paper, discard the filter residue, collect the filtrate and cool it to 40°C.

[0018] The above solution cooled to 40°C is separated by suction filtration to obtain Ba(OH) 2 ·8H 2 O, put it in a blast oven at 65°C for 4 hours and take it out to obtain Ba(OH) 2 ·8H 2 O sample 2 # .

Embodiment 3

[0020] Put 4000ml of 250g / L BaS solution in a 5000ml beaker, add 790g of manganese oxide ore powder (MnO 2 38.7%, Fe 8.6%), maintain the temperature in the range of 75°C, the solid-liquid separation after the airtight reaction for 1.5 hours, the filter residue is rinsed with a small amount of hot deionized water, the filtrate is collected and airtightly cooled to 35°C, and separated by suction filtration to obtain crude Ba (OH) 2 ·8H 2 O solid press 2.5mol / L[Ba 2+ ]The concentration is dissolved in deionized water, and 27.5% H is added according to the ratio of 7ml / L 2 O 2 Desulfurize, heat and boil for 15 minutes, filter hot with slow speed filter paper, discard the filter residue, collect the filtrate and cool it to 30°C in a sealed manner.

[0021] The above-mentioned solution cooled to 40°C was separated by suction filtration, and the obtained Ba(OH) 2 ·8H 2 O was placed in a blast oven at 65°C for 4 hours, and then taken out to obtain Ba(OH) 2 ·8H 2 O sample 3 # .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for preparing Ba(OH)2.8H2O, comprising the following steps: preparing 130-250g / L of BaS solution; quantitatively adding manganese dioxide ores according to the reaction mol ratio and hermetically stirring the mixture to react at 65-85 DEG C for 1-2.5h and carrying out solid-liquid separation to obtain the liquid phase; hermetically stirring and cooling the liquid phase to 25-40 DEG C and carrying out centrifugal separation to obtain the coarse Ba(OH)2.8H2O; dissolving the coarse Ba(OH)2.8H2O into deionized water according to 1.5-2.5mol / L of [Ba2+], adding 27.5% of H2O2 by weight according to 2.0-8.5ml / L, raising the temperature to boil the mixture and keeping slight boiling for 15-30min; and filtering the above solution, hermetically cooling the filtrate to 30-45 DEG C and then carrying out centrifugal separation to obtain the crystal Ba(OH)2.8H2O. By the method, the high purity Ba(OH)2.8H2O product can be prepared at lower cost.

Description

Technical field [0001] The present invention relates to a Ba(OH) 2 ·8H 2 O preparation method, especially the use of BaS to prepare Ba(OH) 2 ·8H 2 O's method. Background technique [0002] The method for preparing barium hydroxide mainly includes a high-temperature decomposition method. The barium carbonate is mixed with coal and then obtained by high-temperature thermal decomposition, and then leaching, purification, and crystallization. The method has high energy consumption and high cost. [0003] The publication number CN1425613 discloses a method for preparing barium hydroxide, which utilizes the reaction of barium sulfide and manganese dioxide to generate barium hydroxide and manganous oxide. However, the publication claims that the barium sulfide solution is cooled to obtain mixed crystals of barium hydroxide and barium sulfide, and that BaS is separated and removed by washing with water. Because the solubility of barium sulfide and barium hydroxide is very large and simila...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C01F11/10
Inventor 姜志光华东
Owner GUIZHOU REDSTAR DEVING