CN106587108A - Method for separating and prerparing potassium chloride through temperature difference of solubility - Google Patents
Method for separating and prerparing potassium chloride through temperature difference of solubility Download PDFInfo
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- CN106587108A CN106587108A CN201611225653.5A CN201611225653A CN106587108A CN 106587108 A CN106587108 A CN 106587108A CN 201611225653 A CN201611225653 A CN 201611225653A CN 106587108 A CN106587108 A CN 106587108A
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- potassium chloride
- potassium
- dissolubility
- separates
- temperature contrast
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/04—Chlorides
- C01D3/08—Preparation by working up natural or industrial salt mixtures or siliceous minerals
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a method for separating and preparing potassium chloride through the temperature difference of solubility. The method includes the following steps that a, potassium feldspar is washed, aired and then crushed in a crusher, and passes through a 200-mesh sieve to obtain potassium feldspar powder; b, distilled water and 56% hydrochloric acid are added into the distilled water in sequence, and the obtained mixture is heated to 100-110 DEG C; c, the solution obtained in the step b is filtered and then heated to 120-130 DEG C after insoluble substances are removed, a centrifugal reaction is conducted through a centrifugal machine, and residues are separated out; d, the solution is cooled to obtain precipitated potassium chloride crystals. According to the temperature difference of solubility, potassium chloride is separated and precipitated, compared with a traditional potassium feldspar preparation process, the potassium extraction precision is higher, the economic benefit is obvious, the cost is low and the technological process is simple.
Description
Technical field
The present invention relates to mineral put forward potassium technical field, particularly a kind of separation using temperature contrast dissolubility is obtained potassium chloride
Method.
Background technology
Potassium salt is widely used in the fields such as agricultural fertilizer, chemical industry, pesticide, medicine, weaving, printing and dyeing, glass, ceramics and explosive, consumption
Money is huge, and the economic construction and resource security to country has very important significance, while and being the important ore deposit in short supply of China
Goods and materials source.At present the Fertilizer application amount of China has occupy the first in the world, and the import volume of potash fertilizer occupy the second in the world, chlorination in recent years
Potassium yield has reached more than 130 ten thousand tons, but these can only meet 15% consumption figure.
China is the not enough country of Potash Resources, and the soluble potassium ore deposit of big reserves is not yet found so far, and current potassium salt is carried
The main extraction from potassium feldspar, but the method for conventionally employed sulphuric acid are taken, a large amount of pollutions can be caused, and it is with high costs.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art, there is provided one kind is separated using temperature contrast dissolubility and is obtained
The method of potassium chloride, the present invention is separated using the temperature contrast of dissolubility and separates out potassium chloride so that traditional potassium feldspar preparation technology
Put forward potassium precision higher, economic benefit is obvious, with low cost, short flow.
The purpose of the present invention is achieved through the following technical solutions：One kind is separated using temperature contrast dissolubility and is obtained
The method of potassium chloride, comprises the following steps：
A, potassium feldspar is cleaned after dry, send into pulverizer in crush, and cross 200 mesh sieves, obtain potassium feldspar powder；
B, distilled water will be added in potassium feldspar powder, and add 56% hydrochloric acid, be heated to 100 DEG C -110 DEG C；
C, the solution obtained in step b is filtered, removes insoluble object, and be heated to 120 DEG C -130 DEG C, then by centrifuge from
The heart reacts, and isolates residue；
D, solution is cooled down, obtain the potassium chloride crystallization for separating out.
Preferably, in step a, setting potassium feldspar is crushed twice repeatedly by pulverizer.
Preferably, leaching fluid bowl is additionally provided with stepb.
Preferably, in stepb also added with flocculant.
Preferably, vacuum cooling crystallizer is provided with step d, potassium chloride crystallization is separated out by vacuum cooled.
Preferably, the surplus solution after step d pulverizes prepared potassium chloride crystallization after evaporation and drying process.
Preferably, multiple crystallizer tandems are provided with after step d to be connected.
Beneficial effects of the present invention are：
（1）Separated using the temperature contrast of dissolubility and separate out potassium chloride so that it is higher that traditional potassium feldspar preparation technology puies forward potassium precision,
Economic benefit is obvious, with low cost, short flow；
（2）Solid-liquid separation is carried out using centrifugation reaction, the residue in solution is favorably rapidly removed, it is to avoid tradition uses sulfuric acid reaction
The drawbacks of causing a large amount of thermal wastes.
Specific embodiment
Present invention is further described below by embodiment, but present disclosure be not limited to it is following
Embodiment.
Embodiment 1：
A kind of utilization temperature contrast dissolubility separates the method that potassium chloride is obtained, and comprises the following steps：
A, potassium feldspar is cleaned after dry, send in pulverizer and crush, and cross 200 mesh sieves, obtain potassium feldspar powder, and enter repeatedly
Capable crushing operation twice；
B, distilled water will be added in potassium feldspar powder, and add 56% hydrochloric acid, be heated to 100 DEG C；
C, the solution obtained in step b is filtered, remove insoluble object, and be heated to 120 DEG C, then it is anti-by centrifuge
Should, isolate residue；
D, solution is cooled down, obtain the potassium chloride crystallization for separating out, by surplus solution by after evaporation and drying process, pulverizing prepared
Potassium chloride is crystallized.
Embodiment 2：
A kind of utilization temperature contrast dissolubility separates the method that potassium chloride is obtained, and comprises the following steps：
A, potassium feldspar is cleaned after dry, send in pulverizer and crush, and cross 200 mesh sieves, obtain potassium feldspar powder, and enter repeatedly
Capable crushing operation twice；
B, distilled water will be added in potassium feldspar powder, and add 56% hydrochloric acid, be heated to 110 DEG C；
C, the solution obtained in step b is filtered, remove insoluble object, and be heated to 130 DEG C, then it is anti-by centrifuge
Should, isolate residue；
D, solution is cooled down, obtain the potassium chloride crystallization for separating out, by surplus solution by after evaporation and drying process, pulverizing prepared
Potassium chloride is crystallized.
Embodiment 3：
A kind of utilization temperature contrast dissolubility separates the method that potassium chloride is obtained, and comprises the following steps：
A, potassium feldspar is cleaned after dry, send in pulverizer and crush, and cross 200 mesh sieves, obtain potassium feldspar powder, and enter repeatedly
Capable crushing operation twice；
B, distilled water will be added in potassium feldspar powder, and add 56% hydrochloric acid, be heated to 105 DEG C；
C, the solution obtained in step b is filtered, remove insoluble object, and be heated to 120 DEG C, then it is anti-by centrifuge
Should, isolate residue；
D, solution is cooled down, obtain the potassium chloride crystallization for separating out, by surplus solution by after evaporation and drying process, pulverizing prepared
Potassium chloride is crystallized.
Embodiment 4：
A kind of utilization temperature contrast dissolubility separates the method that potassium chloride is obtained, and comprises the following steps：
A, potassium feldspar is cleaned after dry, send in pulverizer and crush, and cross 200 mesh sieves, obtain potassium feldspar powder, and enter repeatedly
Capable crushing operation twice；
B, distilled water will be added in potassium feldspar powder, and add 56% hydrochloric acid, be heated to 100 DEG C；
C, the solution obtained in step b is filtered, remove insoluble object, and be heated to 125 DEG C, then it is anti-by centrifuge
Should, isolate residue；
D, solution is cooled down, obtain the potassium chloride crystallization for separating out, by surplus solution by after evaporation and drying process, pulverizing prepared
Potassium chloride is crystallized.
Embodiment described above only expresses the specific embodiment of the present invention, and its description is more concrete and detailed, but and
Therefore the restriction to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, some deformations and improvement can also be made, these belong to the guarantor of the present invention
Shield scope.
Claims (7)
1. a kind of utilization temperature contrast dissolubility separates the method that potassium chloride is obtained, it is characterised in that comprise the following steps：
A, potassium feldspar is cleaned after dry, send into pulverizer in crush, and cross 200 mesh sieves, obtain potassium feldspar powder；
B, distilled water will be added in potassium feldspar powder, and add 56% hydrochloric acid, be heated to 100 DEG C -110 DEG C；
C, the solution obtained in step b is filtered, removes insoluble object, and be heated to 120 DEG C -130 DEG C, then by centrifuge from
The heart reacts, and isolates residue；
D, solution is cooled down, obtain the potassium chloride crystallization for separating out.
2. according to claim 1 a kind of utilization temperature contrast dissolubility separates the method that potassium chloride is obtained, it is characterised in that
In step a, setting potassium feldspar is crushed twice repeatedly by pulverizer.
3. according to claim 1 a kind of utilization temperature contrast dissolubility separates the method that potassium chloride is obtained, it is characterised in that
Leaching fluid bowl is additionally provided with stepb.
4. according to claim 1 a kind of utilization temperature contrast dissolubility separates the method that potassium chloride is obtained, it is characterised in that
In stepb also added with flocculant.
5. according to claim 1 a kind of utilization temperature contrast dissolubility separates the method that potassium chloride is obtained, it is characterised in that
Vacuum cooling crystallizer is provided with step d, potassium chloride crystallization is separated out by vacuum cooled.
6. according to claim 1 a kind of utilization temperature contrast dissolubility separates the method that potassium chloride is obtained, it is characterised in that
Surplus solution after step d pulverizes prepared potassium chloride crystallization after evaporation and drying process.
7. according to claim 1 a kind of utilization temperature contrast dissolubility separates the method that potassium chloride is obtained, it is characterised in that
It is provided with multiple crystallizer tandems after step d to be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611225653.5A CN106587108A (en) | 2016-12-27 | 2016-12-27 | Method for separating and prerparing potassium chloride through temperature difference of solubility |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611225653.5A CN106587108A (en) | 2016-12-27 | 2016-12-27 | Method for separating and prerparing potassium chloride through temperature difference of solubility |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106587108A true CN106587108A (en) | 2017-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611225653.5A Pending CN106587108A (en) | 2016-12-27 | 2016-12-27 | Method for separating and prerparing potassium chloride through temperature difference of solubility |
Country Status (1)
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|---|---|
| CN (1) | CN106587108A (en) |
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2016
- 2016-12-27 CN CN201611225653.5A patent/CN106587108A/en active Pending
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| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170426 |
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| WD01 | Invention patent application deemed withdrawn after publication |