CN1974378A - Process of extracting tellurium from sea water - Google Patents
Process of extracting tellurium from sea water Download PDFInfo
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- CN1974378A CN1974378A CN 200610070685 CN200610070685A CN1974378A CN 1974378 A CN1974378 A CN 1974378A CN 200610070685 CN200610070685 CN 200610070685 CN 200610070685 A CN200610070685 A CN 200610070685A CN 1974378 A CN1974378 A CN 1974378A
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- seawater
- tellurium
- organic phase
- bittern
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Abstract
The process of extracting tellurium from sea water includes the following steps: regulating pH value of concentrated sea water or bittern to weak acidity; adding water solution of flocculant FeCl3 or LaNO3 and dropping ammonia water in the volume ratio of ammonia water, sea water and flocculant in 1000 to 5-10 to 20, heating to flocculate and vacuum sucking filtering; dissolving the obtained precipitate in hydrochloric acid, adding organic solvent into the solution and separating the organic phase and the water phase; adding nitric acid into the organic phase to reversely extract tellurium from the organic phase, and evaporating to obtain tellurate of 70-75 % purity. The present invention has rich material, simple technological process and high economic benefit.
Description
Technical field:
The present invention relates to a kind of extracting method of tellurium, particularly relate to a kind of method of from seawater, extracting tellurium.Belong to the marine chemical industry field of engineering technology.
Background technology:
Tellurium is a kind of rare and scatter element, and content is extremely low in the earth's crust, is less than 2 * 10
-7, less formation independent deposit.For a long time, tellurium element mainly be recovered as the comprehensive utilization object from some copper-nickel sulfide ore deposit or copper mine stone, thereby the output of tellurium is very low always as the association component.Add up according to STDA, the output of whole world tellurium is about 220 tons/year, but the range of application of tellurium is very extensive, it mainly is additive as the iron and steel non-ferrous metal, next is the catalyzer of oil and Chemical Manufacture, the vulcanizing agent of rubber, setting accelerator etc., and tellurium has unique purposes in glass, electronic industry.Along with the continuous expansion of range of application, worldwide supply falls short of demand for tellurium in recent years, causes its price constantly to rise violently.Therefore, the technological method of research and development extraction tellurium has wide market application prospect.
The chemical resource that is richly stored with in the seawater in 109 kinds of chemical elements having found, just contains kind more than 80 in the seawater on our earth.Every 1km
3Contain 3,500 ten thousand t solid matters in the seawater, wherein major part is a useful element, about 100,000,000 dollars of total value, and visible seawater is rated as huge liquid mineral wealth.But seawater is again an extremely complicated low-grade system, and wherein each kind of element separated or enrichment selectively effectively, all needs brand-new material and technology efficiently.This not only will have the breakthrough of single technology, also should consider the factor of comprehensive utilization aspect.In decades, the comprehensive utilization technique of seawater has received the concern of various countries.Realized directly from seawater, extracting sodium-chlor, bromine and magnesian suitability for industrialized production at present in the world, directly from seawater, extracted potassium, uranium, lithium etc. and actively stride forward to industrialization.But never have the proven technique method for from seawater, extracting tellurium both at home and abroad at present.Along with the large-scale application of coastland sea water desaltination and seawater recirculation refrigerating technology, the amount of the concentrated seawater of generation is appreciable.Because the concentration of the chemical substance in the concentrated seawater is doubled, fully utilizes this resource and will help further to reduce and extract the wherein energy expenditure and the minimizing of chemical substance and make the water cost.The amount of the bittern that produces is also considerable in salt industry in addition, but present level of comprehensive utilization is not high, if can therefrom extract tellurium again, can obviously improve overall economic efficiency.
Summary of the invention:
The object of the present invention is to provide a kind of method of from seawater, extracting tellurium, it provides a kind of new method, extract the tellurium of high value in concentrated seawater that from industry such as sea water desaltination, preparing salt by working up seawater, produces or the bittern, turn waste into wealth, effectively improve the comprehensive utilization value of seawater.
For achieving the above object, the inventive method comprises following operation steps:
(1) getting concentrated seawater or bittern, is about 6.5 with the hydrochloric acid adjust pH, adds the FeCl of 0.5～2.0mol/L
3Or the LaNO of 0.5～2.0mol/L
3The aqueous solution is as flocculation agent, dropping ammonia again, the volume ratio of seawater and flocculation agent and ammoniacal liquor is approximately 1000: 5-10: 20, heat 60～70 ℃ of flocculations 1 hour, adopt vacuum filtration to make solid-liquid separation, the precipitation of gained is the preliminary enriched products that contains tellurium behind the suction filtration;
(2) will precipitate the dissolving with hydrochloric acid of using 1mol/L, adding volume ratio in lysate is 1: 1 tetracol phenixin and the tellurium in the trichloromethane mixture extraction solution, and the organic mutual-assistance tellurium that obtains after organic phase and the aqueous phase separation is obtained further enrichment;
(3) add strippant nitric acid in organic phase, the tellurium in the reextraction organic phase obtains the higher tellurate of concentration, and can obtain purity down after the evaporation at 80～100 ℃ is 70～75% tellurate.
The concentrated seawater that the present invention adopts is meant that seawater is after desalination techniques extracts fresh water, seawater is concentrated one times part, and adopts the seawater recirculation refrigerating technology, during as industrial colling, moisture in the seawater volatilizees gradually, the part of discharging after the concentration of seawater reaches one times of enrichment; Bittern derives from salt industry.
The inventive method is extracted tellurium by methods such as co-precipitation, extractions from concentrated seawater or bittern, abundant raw material, and technology is simple, and is with low cost, improved the seawater level of comprehensive utilization on the one hand, effectively utilized resource; Reduce the comprehensive cost of product on the other hand, increased competitiveness of product.At present, fast development along with the sea water desaltination industry, the amount of the concentrated seawater that is produced increases day by day, the bittern that is produced in traditional Salt production process utilizes degree also not high simultaneously, the recovery tellurium can be enterprise and brings bigger economic interests from these by products, reduce the comprehensive cost of product, prospect is very wide.
Embodiment:
The present invention is further described below in conjunction with embodiment.
Embodiment 1, get the concentrated seawater 1000ml that sea water desaltination produces, transferring pH with hydrochloric acid is 6.5, and adding 5ml concentration is the FeCl of 1mol/L
3The aqueous solution and 20mL strong aqua, heating keeps 60 ℃ of temperature, flocculates vacuum filtration 1 hour, the precipitation of gained behind the suction filtration is used the dissolving with hydrochloric acid of 1mol/L, the adding volume ratio is 1: 1 tetracol phenixin and trichloromethane mixture 10mL in lysate, and the tellurium in the extraction solution is with organic phase and aqueous phase separation, in the organic phase that obtains, add the 2mL concentrated nitric acid, tellurium in the reextraction organic phase obtains the higher tellurate of concentration at last, and can obtain down purity after the evaporation at 80 ℃ is 74.6% tellurate.
Embodiment 2, get the concentrated seawater 1000ml that sea water desaltination produces, transferring pH with hydrochloric acid is 6.5, and adding 10ml concentration is the LaNO of 1mol/L
3The aqueous solution and 20mL strong aqua, keep 70 ℃ of temperature, flocculated vacuum filtration 1 hour, the precipitation of gained behind the suction filtration is used the dissolving with hydrochloric acid of 1mol/L, add volume ratio and be 1: 1 tetracol phenixin and trichloromethane mixture 10mL in lysate, the tellurium in the extraction solution is with organic phase and water sepn, in the organic phase that obtains, add 2mL nitric acid, tellurium in the reextraction organic phase obtains the higher tellurate of concentration at last, and can obtain down purity after the evaporation at 100 ℃ is 73.8% tellurate.
Claims (4)
1, a kind of method of extracting tellurium from seawater, it is characterized in that getting concentrated seawater or bittern adjust pH is 6.5, adds the FeCl of 0.5～2.0mol/L
3Or the LaNO of 0.5～2.0mol/L
3The aqueous solution is as flocculation agent, dropping ammonia again, and the volume ratio of seawater and flocculation agent and ammoniacal liquor is 1000: 5-10: 20, heat 60～70 ℃ of flocculations, vacuum filtration; With the precipitation of gained behind the suction filtration dissolving with hydrochloric acid, in lysate, add volume ratio and be the tellurium in 1: 1 tetracol phenixin and the trichloromethane mixture extraction solution, with organic phase and aqueous phase separation with 1mol/L; Add strippant nitric acid in organic phase, the tellurium in the reextraction organic phase obtains the tellurate that purity is 70-75% after the evaporation down at 80～100 ℃.
2, a kind of method of from seawater, extracting tellurium according to claim 1, it is characterized in that concentrated seawater is meant that seawater is after desalination techniques extracts fresh water, seawater is concentrated one times part, and employing seawater recirculation refrigerating technology, during as industrial colling, moisture in the seawater volatilizees gradually, the part of discharging after the concentration of seawater reaches one times of enrichment; Bittern derives from salt industry.
3, a kind of method of extracting tellurium from seawater according to claim 1 is characterized in that be 6.5 with concentrated seawater or bittern with the hydrochloric acid adjust pH.
4 a kind of methods of extracting tellurium from seawater according to claim 1 after it is characterized in that adding flocculation agent and ammoniacal liquor in concentrated seawater or the bittern, heat 60～70 ℃ of flocculations 1 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100706852A CN100431947C (en) | 2006-12-07 | 2006-12-07 | Process of extracting tellurium from sea water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100706852A CN100431947C (en) | 2006-12-07 | 2006-12-07 | Process of extracting tellurium from sea water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1974378A true CN1974378A (en) | 2007-06-06 |
| CN100431947C CN100431947C (en) | 2008-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100706852A Expired - Fee Related CN100431947C (en) | 2006-12-07 | 2006-12-07 | Process of extracting tellurium from sea water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103264997A (en) * | 2013-05-28 | 2013-08-28 | 河北工业大学 | Method for extracting tellurium from low-concentration tellurium solution |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5271831A (en) * | 1989-10-30 | 1993-12-21 | The United States Of America As Represented By The Secretary Of The Interior | Selenate removal from waste water |
| CA2002154A1 (en) * | 1989-11-03 | 1991-05-03 | Tei Stewart Sanmiya | Tellurium recovery |
| JP3786293B2 (en) * | 1995-08-21 | 2006-06-14 | ミヨシ油脂株式会社 | Method for recovering selenium from a solution containing selenium |
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2006
- 2006-12-07 CN CNB2006100706852A patent/CN100431947C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103264997A (en) * | 2013-05-28 | 2013-08-28 | 河北工业大学 | Method for extracting tellurium from low-concentration tellurium solution |
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| CN100431947C (en) | 2008-11-12 |
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Granted publication date: 20081112 Termination date: 20100107 |