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Technique for preparing high quality boric acid from salt lake type boron ore by one-step method

A high-quality and technological technology, applied in the direction of boron oxide compounds, can solve the problems of non-compliance with the quality requirements of boric acid products, low grade and yield, secondary pollution of products, etc., to eliminate secondary pollution, simple operation, boron magnesium Complete separation effect

Inactive Publication Date: 2008-07-02
肖莹
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, tap water not only contains cationic impurities such as calcium, magnesium, and iron, but also contains anionic impurities such as sulfate, chloride, and carbonate, as well as sediment, organic and inorganic suspended matter, etc., not only the ability to wash and remove various impurities is very limited, And it will cause secondary pollution to the product
[0011] These common problems in the production of boric acid currently lead to poor product quality, extremely low grade and yield, and do not meet the quality requirements of domestic solar energy, electronics, fine boride and other industries for boric acid products.

Method used

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  • Technique for preparing high quality boric acid from salt lake type boron ore by one-step method
  • Technique for preparing high quality boric acid from salt lake type boron ore by one-step method
  • Technique for preparing high quality boric acid from salt lake type boron ore by one-step method

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Experimental program
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Effect test

Embodiment 1

[0036] Embodiment 1: as figure 1 In the process flow chart shown, after the ore is crushed and pretreated, it is acidified with sulfuric acid, and sodium chlorate is added as an iron-resistant solvent in the later stage of the reaction, so that part of the iron ions flow into the solid phase. The chemical reaction formula is ClO 3 - +Fe 2+ +6H + =CL - +Fe 3+ +3H 2 O, Fe 3+ +3H 2 O=Fe(OH) 3 ↓+3H + Afterwards, add oxidant hydrogen peroxide, heavy metal precipitant sodium sulfide or boiler ash to make iron, aluminum and heavy metal ions generate precipitation, or be adsorbed and filtered out. Adding additives in this process can precipitate and filter out. The chemical reaction formula For: 2Fe 2+ +H 2 o 2 +2H + =2Fe 3+ +2H 2 O, Fe 3+ +3H 2 O=Fe(OH) 3 ↓+3H + 、Al 3+ +3H 2 O=Al(OH) 3 ↓+3H + , Mn 2+ +Na 2 S=MnS↓+2Na + , Pb 2+ +Na 2 S=PbS↓+2Na + 、2As 3+ +3Na 2 S=As 2 S 3 ↓+6Na + ; In the filtration 1 process, the boron mud is leached and re-slurried,...

Embodiment 2

[0041] Embodiment 2: as figure 2 As shown in the process flow diagram, the present invention is to increase oxidation, vulcanization or boiler furnace ash adsorption and impurity removal process between filtration and cooling crystallization 1 process, and before cooling and crystallization after oxidation, vulcanization or boiler furnace ash adsorption and impurity removal process, The mother liquor was filtered again 3, and the filter residue (iron slime) obtained after the filtration was removed, and the filtrate was cooled and crystallized 1; the others were the same as in Example 1.

[0042] In the oxidation and impurity removal process, the present invention adds boron ore powder as a pH regulator, and any one of ammonia water, calcium carbonate powder, sodium hydroxide, and calcium hydroxide solution can also be used as a pH regulator;

[0043] In the oxidative impurity removal process, in addition to hydrogen peroxide, sodium hypochlorite can also be used as an oxidan...

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Abstract

The invention relates to the technical field of extracting boracic acid, in particular to a technological method for preparing boracic acid from a saline boron rock in one-step. On the base of preliminary treatment of ore-acidolysis-filtering-crystallization-dehydration-washing-drying- boracic acid, the invention adds a purification process, namely, impurity removal through chemical oxidation between the acidolysis and crystallization processes. The invention has beneficial effects that: compared with activated carbon absorption method, the oxidizing impurity removal and decoloring techniques of the invention has the advantages of thorough impurity removal, complete decoloring, simple flow process, low operation cost and stronger operability; the product yield is further improved by that boric sludge is leached and then treated with slurry, in which rudimental boron is collected; an independent design of a three-way counter current concentration boron and magnesium separating technique for the technical process overcomes the disadvantages of high energy consumption, inefficiency and incomplete separation in a technique of atmospheric concentrate, decompression single-effect concentration and boron and magnesium separation, which saves energy source and reduces cost. The invention can be widely applied for preparing boracic acid from a saline boron rock.

Description

technical field [0001] The invention relates to the technical field of boric acid extraction, in particular to a process method for preparing high-quality boric acid by using a salt lake type boron ore in one step. Background technique [0002] The production methods adopted by domestic boric acid industry can be divided into two-step method and one-step method. The two-step process is to combine the pretreated mineral powder with soda ash, CO 2 Reaction, first produce industrial borax, then react with sulfuric acid or nitric acid and borax solution, and then acidify to produce industrial boric acid, the by-product is mirabilite or sodium nitrate; the one-step process uses inorganic acids, such as sulfuric acid, hydrochloric acid, nitric acid, etc. as decomposition agents , The process of preparing industrial boric acid by directly reacting with boron-containing minerals, such as boron magnesium ore, borax ore, colemanite ore, and sodium borate ore. [0003] The production...

Claims

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Application Information

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IPC IPC(8): C01B35/10
Inventor 肖莹
Owner 肖莹
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