CN1038252A - The method that cold process, hot legal system are got the higher-grade schoenite - Google Patents
The method that cold process, hot legal system are got the higher-grade schoenite Download PDFInfo
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- CN1038252A CN1038252A CN 88103389 CN88103389A CN1038252A CN 1038252 A CN1038252 A CN 1038252A CN 88103389 CN88103389 CN 88103389 CN 88103389 A CN88103389 A CN 88103389A CN 1038252 A CN1038252 A CN 1038252A
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- schoenite
- grade
- magnesium mixed
- water
- mixed salt
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Abstract
A kind of method with cold process, hot method production higher-grade schoenite or schoenite and potassium chloride mixture from sulfate type salt lake bittern.The present invention has made full use of the climatic characteristic that area, salt lake temperature difference per day is big, year low temperature time is long.Having does not need to return salt pan evaporation and can obtain schoenite, and the production cycle shortens, needs quality product height, crystalline particle few with the fresh water amount, that obtain moderate, is convenient to advantages such as further processing.The single transformation efficiency of potassium of the present invention is more than 50%, technological process is simple, resulting higher-grade schoenite can be directly as no chlorine potassium magnesium mixed fertilizer, and the mixture of resulting schoenite or schoenite and Repone K can be used as the raw material of producing vitriolate of tartar, and economic benefit is obvious.
Description
The invention belongs to the salt-water system phase detachment technique.
One of known method of producing schoenite from sulfate type salt lake bittern has russian patent 998,348, (1983).This method is that bittern evaporation is obtained potassium magnesium mixed salt, and water is handled potassium magnesium mixed salt at twice, and the fs, its amount of water was the 15-30% of potassium magnesium mixed salt weight when adding water treatment, and temperature is-2 ℃-30 ℃.When subordinate phase adds water treatment, be performed until potassium magnesium mixed salt and dissolve fully, separate water-insoluble, and when temperature-2 ℃-2 ℃, go out schoenite by the gained solution crystallization.This method weak point is the single transformation efficiency lower (27%-43%) that twice water treatment makes potassium, and operating process is more loaded down with trivial details.Two of currently known methods has Chinese patent, application number is 87103934, this method is that the potassium magnesium mixed salt that bittern evaporation obtains is returned molten evaporation process, can obtain the mixture of schoenite or schoenite and Repone K, potassium magnesium mixed salt returns when molten, and the weight ratio of water and potassium magnesium mixed salt is 1.4: 1, and this method weak point is that consumption fresh water amount is bigger, production cycle is longer, quality product poor slightly (mainly be contain water-insoluble high slightly).The present invention has overcome some weak point of prior art, makes the technological process simplification of producing the higher-grade schoenite from potassium magnesium mixed salt; The single transformation efficiency of potassium improves; Geographic weather condition in salt lake and natural advantage have been made full use of; Economic benefit is obvious.
The present invention carries out the processing of two kinds of methods with the different potassium magnesium mixed salt of composition that the salt lake brine evaporation obtains, a kind of is thermosol cold crystallization method (hereinafter to be referred as hot method), another kind is a cold decomposition cold crystallization method (hereinafter to be referred as cold process), and these two kinds of methods all can obtain the mixture of high-grade schoenite or schoenite and Repone K.
Hot method is the water that adds suitable potassium magnesium mixed salt amount 70%-90% in potassium magnesium mixed salt, thermosol under 40 ℃ of-70 ℃ of temperature, solution separating behind the thermosol goes out water-insoluble, again solution is cooled to naturally 0 ℃-10 ℃, isolate the mixture of higher-grade schoenite or schoenite and Repone K, quality product height, the no water-insoluble produced with this method.
Cold process is that (20 ℃) add the water that is equivalent to potassium magnesium mixed salt amount 70%-90% and carry out decomposition reaction in potassium magnesium mixed salt at normal temperatures, behind to be decomposed the finishing, naturally be cooled to 0 ℃-10 ℃, isolate the mixture of higher-grade schoenite or schoenite and Repone K then.This method is poor slightly than hot method quality product, and water-insoluble is high slightly.
The present invention has made full use of the climatic characteristic that area, salt lake temperature difference per day is big, year low temperature time is long.This law and Chinese patent 87103934 relatively, having does not need to return the salt pan evaporation and can obtain schoenite, the production cycle shortens, needs quality product height, crystalline particle few with the fresh water amount, that obtain moderate, is convenient to advantages such as further processing.With russian patent 998,348, compare (1983), and the single transformation efficiency of potassium of the present invention is more than 50%, and technological process is simple, is easy to grasp.Can be from the higher-grade schoenite that the present invention obtains directly as no chlorine potassium magnesium mixed fertilizer, the mixture of resulting schoenite or schoenite and Repone K also can be used as the raw material of producing vitriolate of tartar.
The contriver once made a plurality of embodiment, lifted three for example down.
Example one: obtain 1kg potassium magnesium mixed salt by certain sulfate type salt lake bittern of evaporation, it consists of and contains NaCl 12.94%, and KCl 16.21%, MgSO
423.84%, MgCl
212.72%, H
2O 34.29%.Under 50 ℃ of conditions, dissolve this potassium magnesium mixed salt with 800g water, hot solution is separated water-insoluble after, naturally cool to 0 ℃, isolate 247 the gram schoenites, it consists of and contains K
2SO
4MgSO
46H
2O 98.99%, and NaCl 0.63%, and the single transformation efficiency of potassium is 55.85%.Mother liquor after separating is returned evaporation stage reclaim, this mother liquor consists of and contains NaCl 7.88%, and KCl 4.37%, MgSO
45.62%, MgCl
211.57%, H
2O 70.56%.
Example two: obtain 1kg potassium magnesium mixed salt by certain sulfate type salt lake bittern of evaporation, it consists of and contains NaCl 8.16%, and KCl 14.42%, MgSO
418.97%, MgCl
219.51%, H
2O 38.94%.Under 60 ℃ of conditions, dissolve this potassium magnesium mixed salt with 800 gram water, hot solution is separated water-insoluble after, naturally cool to 10 ℃, isolate 170 and restrain schoenite and potassium chloride mixtures, it consists of and contains K
2SO
4MgSO
46H
2O 89.00%, and KCl 9.62%, and NaCl 0.57%, MgSO
40.74%.The single transformation efficiency of potassium is 50.21%.Mother liquor after separating is returned evaporation stage reclaim, this mother liquor consists of and contains NaCl 4.98%, and KCl 4.65%, MgSO
46.31%, MgCl
213.93%, H
2O 70.13%.
Example three: evaporate certain salt lake brine and obtain 1kg potassium magnesium mixed salt, it consists of and contains NaCl 11.59%, and KCl 15.90%, MgSO
420.49%, MgCl
216.05%, H
2O 35.97%.Under 20 ℃ of conditions, with 800 gram water decomposition these potassium magnesium mixed salts, to be decomposedly naturally cool to 0 ℃ after fully, isolate 213 gram schoenite and potassium chloride mixtures, it consists of and contains K
2SO
4MgSO
46H
2O 84.29%, and KCl 10.62%, and NaCl 0.92%, MgSO
41.75%, H
2O 2.42%.The single transformation efficiency of potassium is 56.03%.Mother liquor after separating is returned evaporation stage reclaim, this mother liquor consists of and contains NaCl 6.98%, and KCl 4.29%, MgSO
45.49%, MgCl
213.37%, H
2O 69.87%.
Claims (4)
1, a kind ofly from sulfate type salt lake bittern, obtains potassium magnesium mixed salt through evaporation, adding water handles, separate the method for producing higher-grade schoenite or schoenite and potassium chloride mixture again, feature of the present invention is: thermosol cold crystallization method (hereinafter to be referred as hot method) is to add a certain amount of water in potassium magnesium mixed salt, thermosol at a certain temperature, solution separating is cooled to a certain temperature after going out water-insoluble naturally, isolates the mixture of higher-grade schoenite or schoenite and Repone K at last; Cold decomposition cold crystallization method (abbreviation cold process), be that (20 ℃) add a certain amount of water in the potassium magnesium mixed salt and carry out decomposition reaction at normal temperatures, complete back to be decomposed is cooled to a certain temperature naturally, isolates the mixture of higher-grade schoenite or schoenite and Repone K at last.
2, method according to claim 1 is characterized by the 70%-90% that the water yield that adds in the potassium magnesium mixed salt is equivalent to potassium magnesium mixed salt amount.
3, method according to claim 1, the solution or the solution after the cold decomposition that it is characterized by behind the thermosol are cooled to 0 ℃-10 ℃ naturally.
4, method according to claim 1, it is characterized by hot method is after potassium magnesium mixed salt adds water, solution is heated to 40 ℃-70 ℃ carry out thermosol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88103389 CN1020376C (en) | 1988-05-31 | 1988-05-31 | Prepn. of high grade picromerite by cold/hot process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88103389 CN1020376C (en) | 1988-05-31 | 1988-05-31 | Prepn. of high grade picromerite by cold/hot process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1038252A true CN1038252A (en) | 1989-12-27 |
| CN1020376C CN1020376C (en) | 1993-04-28 |
Family
ID=4832581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88103389 Expired - Fee Related CN1020376C (en) | 1988-05-31 | 1988-05-31 | Prepn. of high grade picromerite by cold/hot process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1020376C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1065213C (en) * | 1998-05-21 | 2001-05-02 | 中国科学院青海盐湖研究所 | Process for preparing soft leonite |
| CN100364891C (en) * | 2004-12-22 | 2008-01-30 | 江进兴 | Method for preparing potassium chloride by sunshine thermo solvation |
| CN105540617A (en) * | 2015-12-25 | 2016-05-04 | 茫崖兴元钾肥有限责任公司 | Potassium sulfate tail liquid recycling method |
| CN106990108A (en) * | 2016-01-20 | 2017-07-28 | 杨雪萍 | A kind of medicinal humidity color shows bottle |
| CN112047364A (en) * | 2020-09-22 | 2020-12-08 | 青海省柴达木综合地质矿产勘查院 | Method for preparing picromerite from magnesium sulfate subtype brine |
-
1988
- 1988-05-31 CN CN 88103389 patent/CN1020376C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1065213C (en) * | 1998-05-21 | 2001-05-02 | 中国科学院青海盐湖研究所 | Process for preparing soft leonite |
| CN100364891C (en) * | 2004-12-22 | 2008-01-30 | 江进兴 | Method for preparing potassium chloride by sunshine thermo solvation |
| CN105540617A (en) * | 2015-12-25 | 2016-05-04 | 茫崖兴元钾肥有限责任公司 | Potassium sulfate tail liquid recycling method |
| CN106990108A (en) * | 2016-01-20 | 2017-07-28 | 杨雪萍 | A kind of medicinal humidity color shows bottle |
| CN112047364A (en) * | 2020-09-22 | 2020-12-08 | 青海省柴达木综合地质矿产勘查院 | Method for preparing picromerite from magnesium sulfate subtype brine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1020376C (en) | 1993-04-28 |
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