Application of box-type extraction tank in extracting boron in salt lake brine

A box-type extraction tank and salt lake brine technology, applied in the direction of boron oxyacids, boron oxide compounds, etc., can solve the problems of unsatisfactory mixing effect and layering effect, high equipment price, high operating cost, etc., and achieve low maintenance cost , easy operation and less investment

Inactive Publication Date: 2016-12-14
青海柴达木兴华锂盐有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the domestic enterprises that extract boric acid in brine by extraction method use brine after acidification and extraction of crude boric acid. Among them, some enterprises use centrifugal extractors, which are expensive in equipment, high in operating costs, and poor in economic benefits. stop boron extraction
The equipment used by some enterprises is an extraction tower, and the mixing effect and layering effect are not ideal

Method used

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  • Application of box-type extraction tank in extracting boron in salt lake brine
  • Application of box-type extraction tank in extracting boron in salt lake brine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Such as figure 1 As shown in the flow chart, hydrochloric acid is added to acidify the brine after pressure filtration. After acidification, the pH of the brine is 2.0. The extractant used is 2-hexyldecanol, and the diluent is sulfonated kerosene. The volume ratio of the two is 1:5. (O / A)=2:1, the number of extraction stages is 2, the single-stage extraction time is 5min, and the clarification time is 15min. The extraction time was 5 minutes, the acidity value of the back-extraction aqueous phase was pH=0.05, the extraction temperature was 50°C, and the back-extraction temperature was room temperature, all of which were countercurrent extractions. The obtained stripping solution was evaporated, cooled, filtered (including washing), and dried to measure Na in the product. + 、K + , Mg 2+ , Ca 2+ , SO 4 2- , Cl - , Fe 3+ The percentage content of boric acid is 0.0032%, 0.0014%, 0.0045%, 0.0013%, 0.0050%, 0.009%, 0.0005%, respectively, and the boric acid content is ...

Embodiment 2

[0023] After the old brine is filtered, add sulfuric acid to acidify. After acidification, the pH of the brine is 1.0. The extractant used is mixed alcohol (isooctanol: n-dodecyl alcohol = 5:1), and the diluent is aviation kerosene. The volume ratio of the two is 1. : 1, extraction ratio (O / A)=1:1, extraction stages 5 stages, single-stage extraction time 3min, clarification time 10min, stripping ratio (O / A)=3:1, stripping stages 5 stages, single-stage back extraction time 6min, acidity value of back extraction aqueous phase pH = 1, extraction temperature 40°C, back extraction temperature at room temperature, all countercurrent extraction. The obtained stripping solution was evaporated, cooled, filtered (including washing), and dried to measure Na in the product. + 、K + , Mg 2+ , Ca 2+ , SO 4 2- , Cl - , Fe 3+ The percentage content of boric acid is 0.0033%, 0.0015%, 0.0040%, 0.0013%, 0.0045%, 0.01%, 0.0005%, respectively, and the content of boric acid is 99.9%, reaching...

Embodiment 3

[0025] After filtering the old brine plate, add hydrochloric acid to acidify. After acidification, the pH of the brine is 0.5. The extractant used is mixed alcohol (pentyl alcohol: n-heptanol = 10:1), and the diluent is solvent gasoline. The volume ratio of the two is 2:1, extraction ratio (O / A)=1:5, extraction stages 10, single-stage extraction time 8min, clarification time 12min, stripping ratio (O / A)=10:1, stripping stage The number of stages is 10, the single-stage back-extraction time is 8 minutes, the acidity value of the back-extraction aqueous phase is pH=0.01, the extraction temperature is 30°C, and the back-extraction temperature is room temperature, all of which are countercurrent extractions. The obtained stripping solution was evaporated, cooled, filtered (including washing), and dried to measure Na in the product. + 、K + , Mg 2+ , Ca 2+ , SO 4 2- , Cl - , Fe 3+ The percentage content of boric acid is 0.0030%, 0.0015%, 0.0045%, 0.0014%, 0.0044%, 0.01%, 0.00...

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Abstract

The invention provides an application of a box-type extraction tank in extracting boron in salt lake brine. The application includes two mainly sections of extraction and reverse extraction. The extraction tank is low in price, convenient in operation and easy to maintain, large-scale production is easy to control, simpleness in entire process and short circulation are achieved, boric acid products more than 99.9% in purity can be obtained via simple evaporating, cooling and crystallizing of obtained reverse extraction liquid, and promotion and application in Qinghai Chaidamu areas are facilitated.

Description

technical field [0001] The invention relates to the application of a box-type extraction tank in extracting boron from salt lake brine. Background technique [0002] Boric acid is an important inorganic salt product, which is widely used in agriculture, glass, ceramics, metallurgy and pharmaceutical industries. With the rapid development of building materials, ceramics and other industries, the amount of boric acid is increasing, and the contradiction between supply and demand is very serious. protrude. At present, the main raw material for producing boric acid in China is boronite, which accounts for 9% of the boron reserves; complex boron ores that are difficult to develop and utilize account for about 50% of the total boron ore reserves. In recent years, with the increasing depletion of boronite resources, research results on boron extraction from brine have emerged, but there are not many processes that are actually used in actual production. [0003] The methods for e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B35/10
CPCC01B35/109C01P2006/80
Inventor 孟庆芬赵朋龙王延风陈念魏廷祥李燕清
Owner 青海柴达木兴华锂盐有限公司
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