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Technique for producing magnesium hydroxide, barium choride and sulfureted hydrogen from brine water in salt lake

A technology of magnesium hydroxide and salt lake brine, applied in the directions of magnesium hydroxide, magnesium/calcium/strontium/barium sulfide/polysulfide, calcium/strontium/barium halide, etc., can solve the problem of high production cost and achieve production Low cost, high product quality and good economic benefits

Inactive Publication Date: 2003-05-07
NAFINE CHEMICAL INDUSTRY GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned production processes are separate, so the production cost is high, and the salt lake brine is not utilized

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The magnesium chloride type brine of the salt lake is passed through a sand filter to remove solid particles and suspended matter. After filtering, the brine and barium chloride are prepared according to the equivalent ratio of barium ions and sulfate ions at 1.05:1. Filter, the filtrate is the brine raw material; absorb hydrogen sulfide gas with 150g / L barium sulfide solution, after the absorption is saturated, after settling for 5hr, the clear liquid is the barium hydrosulfide raw material;

[0028] Take 1 liter of brine raw material (containing Mg 2+ 50g / l) with 2.44 liters of barium hydrosulfide (containing Ba(HS) 2 180g / l) mixed at room temperature, heated to react, control the reaction temperature rise to 3°C / min, control the reaction termination temperature at 102°C, keep the reaction for 30min when the reaction reaches the termination temperature, and recover the generated gas to obtain hydrogen sulfide Gas 69.5g, simultaneously make raw material Ba(SH) 2 415g...

Embodiment 2

[0030] The magnesium chloride type brine of the salt lake is passed through a sand filter to remove solid particles and suspended matter. After filtering, the brine and barium chloride are prepared according to the equivalent ratio of barium ions and sulfate ions at 1.08:1, and react at 60°C to form a precipitate. Filter, the filtrate is the brine raw material; absorb hydrogen sulfide gas with 145g / L barium sulfide solution, after the absorption is saturated, after settling for 7hr, the clear liquid is the barium hydrosulfide raw material;

[0031] Take 1 liter of brine raw material (containing Mg 2+ 65g / l) with 3.2 to 4 liters of barium hydrosulfide (containing Ba(HS) 2 174g / l) mixed at room temperature, heated to react, control the reaction temperature rise to 4°C / min, control the reaction termination temperature at 103°C, and keep it for 45min when the reaction reaches the termination temperature, and recover the generated gas to obtain hydrogen sulfide Gas 88.5g, make raw...

Embodiment 3

[0033] The magnesium chloride type brine of the salt lake is passed through a sand filter to remove solid particles and suspended matter. After filtering, the brine and barium chloride are prepared according to the equivalent ratio of barium ions and sulfate ions at 1.10:1, and react at 70°C to form a precipitate. Filter, the filtrate is the brine raw material; absorb hydrogen sulfide gas with 140g / L barium sulfide solution, after the absorption is saturated, after settling for 8hr, the clear liquid is the barium hydrosulfide raw material;

[0034] Take 1 liter of brine raw material (containing Mg 2+ 80g / l) with 4.2 liters of barium hydrosulfide (containing Ba(HS) 2 168g / l) mixed at room temperature, heated to react, control the reaction temperature rise to 5°C / min, control the reaction termination temperature at 105°C, and keep it for 60min when the reaction reaches the termination temperature, and recover the generated gas to obtain hydrogen sulfide Gas 111g, simultaneously...

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PUM

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Abstract

A process for preapring magnesium hydroxide, barium chloride and hydrogen sulfide from the bittern of salt lake includes such steps as filtering, reaction on barium chloride to obtain raw bittern, thermal reaction on barium hydrosulfide to obtain hydrogen sulfide gas, filter, washing deposit with deionized water to obtain magnesium hydroxide, regulating pH value of filtrate, desulfurizing, neutralizing, depositing, and evaporating the supernatant to obtain barium chloride. Its advantages are high quality of products and low cost.

Description

[0001] Field: [0002] The invention belongs to a production process for comprehensive utilization of salt lake brine, specifically a production process for producing magnesium hydroxide and co-producing barium chloride and hydrogen sulfide by using salt lake magnesium chloride type brine and barium hydrosulfide. Background technique: [0003] The existing production methods of producing magnesium hydroxide, industrial barium chloride and hydrogen sulfide gas are respectively, the production of magnesium hydroxide generally adopts the following production process; a) utilize caustic soda and soluble magnesium salt to react to produce magnesium hydroxide; b) Magnesium hydroxide is produced by ammonia water and soluble magnesium salt; c) Magnesium hydroxide is produced by hydration of low-grade magnesium oxide or lightly burned powder; d) Magnesium hydroxide is produced by directly crushing brucite. The production of industrial barium chloride generally adopts the following prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/42C01F5/14C01F11/24C01F11/46
Inventor 张喜荣郭备战陈晔
Owner NAFINE CHEMICAL INDUSTRY GROUP CO LTD
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