CN1006298B - Method of making schoenite or mixture of schoenite and potassium chloride - Google Patents
Method of making schoenite or mixture of schoenite and potassium chlorideInfo
- Publication number
- CN1006298B CN1006298B CN87103934A CN87103934A CN1006298B CN 1006298 B CN1006298 B CN 1006298B CN 87103934 A CN87103934 A CN 87103934A CN 87103934 A CN87103934 A CN 87103934A CN 1006298 B CN1006298 B CN 1006298B
- Authority
- CN
- China
- Prior art keywords
- mother liquor
- schoenite
- eventually
- salt
- evaporative crystallization
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/133—Renewable energy sources, e.g. sunlight
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Abstract
The present invention relates to a method for directly producing schoenite or the mixture of schoenite and potassium chloride in a salt field from sulfate type salt lake brine so that kalium in the brine is entirely converted into schoenite or the mixture of schoenite and potassium chloride. The weight percentage content of sodium ions which are harmful impurities in a product obtain by the present invention is lower than 1%. In the whole technical process, no chemical additives are added without pollution of waste water, waste gases and waste slag or waste placement, and the solar energy is sufficiently utilized. A product provided by the present invention causes potassium sulfate to be chemically processed easily, and the obtained product has high grade. The present invention is not limited by region and climatic conditions and has a wide application scope.
Description
The invention belongs to salt pan evaporation is separated and produces the technology of schoenite or schoenite and potassium chloride mixture.
Utilize the sulfate type salt lake resource to produce vitriolate of tartar at present in the world, have only the U.S. " Great Salt lake's mineral and chemical company " to obtain success.The said firm uses the salt pan novel process and produces high-grade kainite ore deposit, then chemical processing plant (CPP) is delivered in this ore deposit, and kainite is converted into schoenite, and the flotation schoenite adds and adds water decomposition again behind the Repone K and produce vitriolate of tartar.The Soviet Studies personnel once did number of research projects to the utilization of sulfate type salt lake resource, and explored the method for multiple production high quality schoenite, but all belong to conversion method, promptly with Repone K and saltcake conversion, Repone K and sal epsom transform, and thick sylvite and sal epsom transform or the like.In a word, the U.S. and Russia two family and other be national directly to obtain high-quality schoenite so far as yet from Bittern of Salt Pan, and well-known, the mixture of high-grade schoenite or schoenite and Repone K is the optimal raw material of production vitriolate of tartar.The present invention has obtained success at the mixture that utilizes sulfate type salt lake bittern directly to obtain higher-grade schoenite or schoenite and Repone K from the salt pan produces.Overcome in the prior art and just can obtain the not shortcoming of very high schoenite of quality by complicated chemical processing conversion method.And the salt field process of the U.S. " Great Salt lake's mineral and chemical company " also is only applicable to the area that summer temp is higher and height above sea level is lower, produces restricted by weather.The present invention is not subjected to above condition restriction, has taked a new operational path, realized many, fast, good, utilize the purpose of sulfate type salt lake resource with economizing.
Figure (one) is the process flow sheet of production higher-grade schoenite or schoenite and potassium chloride mixture from sulfate type salt lake bittern.Salt lake brine (L among the figure
0) enter evaporative crystallization pond (1), anhydrate through spontaneous evaporation, separate out NaCl crystal (S
1), obtain mother liquor (1); Mother liquor (1) enters mixing pit (1), mother liquor (1) can mix with certain proportion with saturated magnesium chloride bittern (L eventually) in mixing pit (1), its ratio (L eventually): mother liquor (1) is 0～0.4: the 1(weight ratio, below all together), when ratio is 0, mother liquor (1) directly enters evaporative crystallization pond (2), salts out NaCl crystal (S during other ratio
1), obtain mother liquor (2); Mother liquor (2) enters evaporative crystallization pond (2), anhydrates through spontaneous evaporation, separates out NaCl and MgSO
47H
2O crystal (S
2), obtain mother liquor (3); Mother liquor (3) enters evaporative crystallization pond (3), anhydrates through spontaneous evaporation, obtains first section potassium mixed salt (S
3) and mother liquor (4); Mother liquor (4) enters evaporative crystallization pond (4), anhydrates through spontaneous evaporation, obtains second section potassium mixed salt (S
4) and mother liquor (5); Mother liquor (5) is saturated magnesium chloride bittern (L eventually); Enter back bath after first section potassium mixed salt and second section potassium mixed salt mix and add water Hui Rong, water: the potassium mixed salt is 1.2～1.4: 1, enters evaporative crystallization pond (5) behind the Hui Rong, anhydrates through spontaneous evaporation, separate out the mixture of higher-grade schoenite or schoenite and Repone K, obtain mother liquor (6); Mother liquor (6) enters mixing pit (2), with saturated magnesium chloride bittern (L eventually) and salt lake brine (L
0) mix, ratio of mixture is (L is eventually): mother liquor (6) is 0.0546: 1～1: 1, (L
0): ((L is eventually)+mother liquor (6)) is 0.546: 1～0.75: 1, salts out the NaCl crystal, obtains mother liquor (7); Mother liquor (7) enters evaporative crystallization pond (2).
Main points of the present invention are based on phase chemistry, use the phase detachment technique of salt-water system in evaporative process, by the salt pan evaporation, are subordinated to Na
+, K
+, Mg
++//Cl
-, SO
4-H
2Directly obtain the mixture of high-quality schoenite or schoenite and Repone K in the sulfate type salt lake bittern of O penton system.The weight percentage of detrimental impurity sodium ion is lower than 1% in the product that the present invention obtains, and when making with this product production vitriolate of tartar, sodium-chlor is not separated out in solid phase, with the quality of raising potassium product and the yield of potassium.In this technical process, by mixing pit (1), available saturated magnesium chloride bittern (L eventually) is regulated the composition of mother liquor (1), its ratio of mixture (L eventually): mother liquor (1) is 0: 1～0.40: the 1(weight ratio), when ratio is 0: 1, the sodium-chlor of not saltouing, the sodium-chlor of then saltouing during other ratio is to reduce the content of sodium-chlor in the potassium mixed salt.By evaporative crystallization pond (3), (4), reduce content of magnesium chloride in the potassium mixed salt with fractional crystallizaton, to reduce in returning molten evaporative crystallization magnesium chloride to the salting-out effect of sodium-chlor.Ratio by water and potassium mixed salt is 1.2～1.4: 1, adds water and returns molten potassium mixed salt, makes that sodium-chlor is in undersaturated condition in solution in the process of evaporative crystallization (5), thereby the content of sodium-chlor is very little in crystallized product.By mixing pit (2), with (L eventually) and (L
0) regulate the bittern composition, its ratio of mixture (L is eventually): mother liquor (6) is 0.0546: 1～1: 1, (L
0): ((L is eventually)+mother liquor (6)) is 0.546: 1～0.75: 1, mother liquor (6) is adjusted to mother liquor (7), and mother liquor (7) is roughly the same with mother liquor (2) composition, makes that the potassium major part in the salt lake brine changes into product.
The present invention can make the potassium in the sulfate type salt lake bittern all change into the mixture of schoenite or schoenite and Repone K in fact.In whole process flow, do not add any chemical additive; Three-waste free pollution and waste dump; And make full use of sun power; The present invention is not subjected to the restriction of region and weather condition, and is widely applicable; And very not complicated in operation control, be easy to be grasped by personnel with certain state of the art.Product provided by the invention becomes simply the chemical process vitriolate of tartar, does not need work in-process to adopt complicated floatation process, the small scale of chemical processing plant (CPP), and the potassium product that processing obtains is of high grade, and sulfur acid potassium can reach 98%, and the yield of course of processing potassium reaches 90%.The invention enables and utilize the economic benefit of sulfate type salt lake resource production vitriolate of tartar fairly obvious.
The contriver once was a plurality of embodiment, lifted two examples below:
Example 1:
Referring to Fig. 1, evaporate certain sulfate type salt lake bittern (L
0) 100kg, obtain potassium mixed salt (S respectively from evaporative crystallization pond (3) and evaporative crystallization pond (4)
3) 3.29kg and (S
4) 4.62kg, add water 11.1kg after it is merged and return moltenly, obtain schoenite product (S from evaporative crystallization pond (5)
5) 1.45kg and mother liquor (6) 11.8kg, in mother liquor (6), add saturated magnesium chloride bittern (L is eventually) 2.80kg and (L
0) 10.8kg, obtaining mother liquor (7) after salting out part sodium-chlor, mother liquor (7) can obtain potassium mixed salt 5.18kg once more through evaporative crystallization, and this potassium mixed salt is participated in the above-mentioned water Hui Rong that adds, and evaporation obtains the process of schoenite.(L wherein
0), (L eventually), (S
3), (S
4) and (S
5) composition see Table (one).(table sees the literary composition back)
With (S
5) be made into compound form, then containing schoenite in the product is 99.17%, NaCl is 0.13%.Calculate by material balance, with potassium mixed salt (S
3), (S
4) in total amount be basic, a yield of potassium is 44.68%, cyclic yield is 94.05%.
Example 2:
Evaporate certain sulfate type salt lake bittern (L
0) 100kg, in mixing pit (1), add (L is eventually) 14.2kg and mix with mother liquor (1), salt out part sodium-chlor, adopt general crystallization, from evaporative crystallization pond (3), obtain potassium mixed salt (S
3) 7.87kg, add water 11.0kg and make it Hui Rong, in evaporative crystallization pond (5), obtain schoenite and potassium chloride mixture (S
3) 1.30kg and mother liquor (6) 11.4kg, in mother liquor (6), add (L is eventually) 0.623kg and (L
0) 6.57kg, obtaining mother liquor (7) after salting out part sodium-chlor, mother liquor (7) can obtain potassium mixed salt 4.17kg once more after evaporation, and this potassium mixed salt is participated in the above-mentioned water Hui Rong that adds, and evaporation obtains the process of product.(L wherein
0), (S
3) and (S
5) composition see Table (two), the composition of (L eventually) is with table ().(table two is seen the literary composition back)
With (S
5) be made into compound form, then containing schoenite in the product is 86.91%, Repone K 11.86%, sodium-chlor 0.38%.Calculate by material balance, with potassium mixed salt (S
3) in general potassium amount be the basis, a yield of potassium is 49.46%, cyclic yield is 90.82%.
Table (one) example one some material is formed
Ion weight percentage composition (%)
Numbering K
+Mg
++Na
+Cl
-SO
= 4
（L
0） 0.79 2.46 6.50 14.71 4.37
(L eventually) 0.03 3.72/24.58 2.02
（S
3） 8.07 7.13 6.03 22.41 20.31
（S
4） 7.93 8.80 2.66 26.67 13.92
（S
5） 19.40 6.00 0.053
＊0.24 47.52
* use aas determination; Other Na
+Value is minusing.
Table (two) example two some materials are formed
Ion weight percentage composition (%)
Numbering K
+Mg
++Na
+Cl
-SO
= 4
（L
0） 0.74 2.38 6.47 14.44 4.25
（S
3） 7.62 8.80 2.73 26.09 14.48
（S
5） 22.84 5.58 0.15
＊5.64 42.10
* use aas determination, other Na
+Value is minusing.
Claims (1)
1, a kind of from the method for sulfate type salt lake bittern at salt pan direct production higher-grade schoenite or schoenite and potassium chloride mixture, it is characterized in that its technical process is: salt lake brine (L
0) enter evaporative crystallization pond (1), anhydrate through spontaneous evaporation, separate out NaCl crystal (S
1), obtain mother liquor (1); Mother liquor (1) enters mixing pit (1), mother liquor (1) can mix with certain proportion with saturated magnesium chloride bittern (L eventually) in mixing pit (1), the saturated magnesium chloride bittern of its ratio (L eventually): mother liquor (1) is 0～0.4: 1 (weight ratio, below all together), when ratio is 0: 1, the sodium-chlor of not saltouing is then separated out NaCl crystal (S during other ratio
1), obtain mother liquor (2); Mother liquor (2) enters evaporative crystallization pond (2), anhydrates through spontaneous evaporation, separates out NaCl and NgSO
47H
2O crystal (S
2), obtain mother liquor (3); Mother liquor (3) enters evaporative crystallization pond (3), anhydrates through spontaneous evaporation, obtains first section potassium mixed salt (S
3) and mother liquor (4); Mother liquor (4) enters evaporative crystallization pond (4), anhydrates through spontaneous evaporation, obtains second section potassium mixed salt (S
4) and mother liquor (5); Mother liquor (5) is saturated magnesium chloride bittern (L eventually); First section potassium mixed salt and second section potassium mixed salt are mixed into back bath and add water Hui Rong, the molten ratio of returning with water after first section potassium mixed salt and second section potassium mixed salt mix is: 1: 1.2～1.4, enter evaporative crystallization pond (5) behind the Hui Rong, anhydrate through spontaneous evaporation, separate out the mixture of higher-grade schoenite or schoenite and Repone K, obtain mother liquor (6); Mother liquor (6) enters mixing pit (2) and saturated magnesium chloride bittern (L eventually) and salt lake brine (L
0) mix, saturated magnesium chloride bittern (L is eventually): mother liquor (6) is 0.0546～1: 1, (L
0): [(L is eventually)+mother liquor (6)] is 0.546～0.75: 1, salts out the NaCl crystal, obtains mother liquor (7); Mother liquor (7) enters evaporative crystallization pond (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87103934A CN1006298B (en) | 1987-05-26 | 1987-05-26 | Method of making schoenite or mixture of schoenite and potassium chloride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87103934A CN1006298B (en) | 1987-05-26 | 1987-05-26 | Method of making schoenite or mixture of schoenite and potassium chloride |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN87103934A CN87103934A (en) | 1987-11-25 |
| CN1006298B true CN1006298B (en) | 1990-01-03 |
Family
ID=4814644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN87103934A Expired CN1006298B (en) | 1987-05-26 | 1987-05-26 | Method of making schoenite or mixture of schoenite and potassium chloride |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1006298B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1044108C (en) * | 1995-11-27 | 1999-07-14 | 中国科学院青海盐湖研究所 | Method for preparing potassium sulfate with sulfate type bittern |
| CN102259899B (en) * | 2011-05-04 | 2013-08-07 | 中国科学院青海盐湖研究所 | Method for enriching micro elements in saturate magnesium chloride brine by recycling potassium chloride |
| CN107381603A (en) * | 2017-07-28 | 2017-11-24 | 中国科学院青海盐湖研究所 | The preparation method of picromerite based on adding halogen method |
-
1987
- 1987-05-26 CN CN87103934A patent/CN1006298B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN87103934A (en) | 1987-11-25 |
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