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Method for producing liquid of barium chloride by using mineral powder of Duyingshi in low grade

A technology of witherite and low-grade is applied in the field of producing liquid barium chloride from low-grade witherite ore powder, which can solve the problem of high production cost, achieve good economic and environmental benefits, and avoid the effects of environmental pollution.

Inactive Publication Date: 2007-12-26
河北盛华化工有限公司
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  • Application Information

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Problems solved by technology

BaCO 3 +2HCl→BaCl 2 +CO 2 ↑+H 2 O This method mainly uses high-grade witherite ore powder as raw material, and the production cost is relatively high
And produce barium chloride solution with low-grade witherite powder (content about 68%) completely, do not see report yet at present

Method used

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  • Method for producing liquid of barium chloride by using mineral powder of Duyingshi in low grade

Examples

Experimental program
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Effect test

Embodiment 1

[0008] Embodiment 1: 3000Kg of witherite powder with a content of 68% is dropped into the reaction tank, and the hydrochloric acid with a concentration of 30% is added, stirred while adding, and the reaction is completed in 3 hours. When the value is 4-5, continue to stir for 30 minutes, add a NaOH solution with a concentration of 42%, and adjust the pH value to 9. At this time, some Ca 2+ Precipitation occurs, Ca 2+ +2OH→Ca(OH) 2 ↓. Stir for 20 minutes, then add concentration and be 42% NaOH, adjust pH value to be 11, this moment Ca 2+ , Mg 2+ The precipitation is basically completed, and there is a small amount of Sr 2+ Precipitate, stir for 20 minutes, then add NaOH solution with a concentration of 42%, adjust the pH value to 13, and now there are most of the Sr 2+ Precipitation, Sr 2+ +2OH→Sr(OH)↓After stirring for 20 minutes, the reaction solution is pumped into the plate and frame filter press, the clear liquid is the product, the filter cake is washed and filtered...

Embodiment 2

[0010] Embodiment 2: 3200Kg of witherite powder with a content of 68% is dropped into the reaction tank, and a concentration of 33.7% hydrochloric acid is added, stirred while adding, and the reaction is completed in 3 hours. When the value is 4-5, continue to stir for 30 minutes, add a concentration of 32% NaOH solution, adjust the pH value to 9, the following process is the same as Example 1, and the concentration of NaOH solution used is 32%. The results of the serum test are as follows:

[0011] BaCl 2 209.9g / l Mg 2+ +Ca 2+ 13.69g / l.Sr 2+ 0.75g / l.

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Abstract

This invention relates to a method for producing liquid BaCl2 by using low-grade-toxicity barite powder. Traditional BaCl2 production methods include barite reduction method and HCl leaching method of high-grade-toxicity barite powder. The barite reduction method can obtain high-purity product, yet has such problems as high apparatus cost and heavy environmental pollution. The HCl leaching method of high-grade-toxicity barite powder added with a small amount of low-grade-toxicity barite powder has a high cost. The method in this invention utilizes low-grade-toxicity barite powder (68%) only to produce liquid BaCl2. Besides, the method adds NaOH solution intermittently to adjust the pH value to remove Mg2+, Ca2+ and Sr2+ while minimize Ba2+ loss. The product is qualified.

Description

technical field [0001] The invention relates to the technical field of fine chemicals, in particular to a method for producing liquid barium chloride with low-grade witherite ore powder. Background technique [0002] At present, there are two production methods of barium chloride, one is the barite reduction method, and the other is the high-grade witherite powder hydrochloric acid method. The barite reduction method is to use barium sulfate (barite), add reducing agent raw coal, and pass through a high-temperature melting furnace to generate barium sulfide, BaSO 4 +2C→BaS+2CO 2 ↑Barium sulfide reacts with hydrochloric acid to form barium chloride BaS+2HCl→BaCl 2 +H 2 S↑This process has high product purity, but the equipment investment is large, and hydrogen sulfide gas is discharged, which causes serious environmental pollution. Another method is to use high-grade witherite powder containing more than 95% barium carbonate or add a small amount of low-grade witherite pow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/24
Inventor 马玉莲王会昌郭桂花郝毅军李东霞杨伟李瑞军
Owner 河北盛华化工有限公司
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