CN1371864A - Novel method for preparing potassium nitrate by utilizing salt lake potassium resource and nitratine - Google Patents
Novel method for preparing potassium nitrate by utilizing salt lake potassium resource and nitratine Download PDFInfo
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- CN1371864A CN1371864A CN 01115275 CN01115275A CN1371864A CN 1371864 A CN1371864 A CN 1371864A CN 01115275 CN01115275 CN 01115275 CN 01115275 A CN01115275 A CN 01115275A CN 1371864 A CN1371864 A CN 1371864A
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- potassium
- saltpetre
- water
- salt lake
- mother liquor
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Abstract
The method for extracting potassium nitrate by utilizing potassium resource of salt lake and natural nitratire includes the following steps: mixing salt lake potassium resource ore and natural nitratire and water and/or potassium nitrate mother liquor together; regulating mass ratio of potassium, nitrate radical and water in the mixture to make the above-mentioned mixed material implement thermal solvation and conversion reaction to form solid-liquid mixed slurry; and separating to obtain thermosolved saturated clear liquor; cooling said clear liquor to room temp. and separating out potassium nitrate, then returning the potassium nitrate mother liquor back into thermal solvation section for reuse. Its yield rate is up to above 90%.
Description
The present invention relates to a kind of technology of producing saltpetre, belong to the salt-water system phase detachment technique.
At present, the processing method of producing saltpetre is to be that raw material mixes with SODIUMNITRATE and carries out heat of solution conversion, solid-liquid separation with Repone K.The mother liquor crystallisation by cooling is separated out saltpetre, and solid-liquid separation is separated sodium chloride content height in the product of back, also need wash, and the Recycling Mother Solution batching is utilized again.This method weak point is that Repone K and SODIUMNITRATE raw material all need be used higher-grade, and product need wash, and operating process is more loaded down with trivial details, long, high, the complex process of cost of production cycle.
The objective of the invention is in order to provide a kind of natural potassium resource, sodium nitre resource utilized to produce the saltpetre product, yield up to more than 90%, technological process is simple, separate back mother liquor reusable edible, utilize salt lake potassium resource and sodium nitre that production cost is low are produced the novel method of saltpetre.
Purpose of the present invention can realize by following measure:
A kind of novel method of utilizing salt lake potassium resource and sodium nitre to produce saltpetre is that potassium resource ore deposit, salt lake and natural sodium nitre and water and/or saltpetre mother liquor are mixed together, the mass ratio of regulating potassium, nitrate radical and water in the mixture is 1: (1.30-3.60): (1.0-4.00), make mixture under 30-100 ℃, carry out the heat of solution conversion reaction, reaction times is 15-60 minute, reaction back forms the solid-liquid mixed slurry, separate after filtration the saturated clear liquid of rubble salt, water-insoluble and thermosol; The saturated clear liquid of thermosol through being cooled to room temperature, is separated out saltpetre; Then the saltpetre mother liquor is returned thermosol stage batching.
The present invention has following advantage compared to existing technology:
1, the present invention utilizes natural potassium resource ore deposit and saliter stone ore to make raw material, has overcome in the existing technology defective that needs the higher-grade raw material, makes that raw material sources in the technology are abundant, cost is low; And the present invention makes full use of the climatic characteristic of the mining area temperature difference, reduces cost, and simplifies production process, need not to evaporate in the salt pan or in equipment, get final product saltpetre, with short production cycle, required fresh water amount is few, the product crystalline particle is moderate.
2, the yield of the single potassium of technology of the present invention can be up to more than 85%, the mother liquor reusable edible after the separation, and economic benefit is obvious.
3, the saltpetre produced of the present invention need not washing, and its grade is greater than 95%, and sodium chloride content is less than 1%, and water insoluble matter content is less than 0.1%.
The present invention also will be described in further detail in conjunction with the embodiments:
Embodiment one:
Get thick potash fertilizer 100g, wherein consist of KCl70%, MgCl
21.53%, NaCl22.31%, water-insoluble 3.85%, H
2O2.31%; SODIUMNITRATE 99%, 103.16g; H
2O 49.56g mixes above-mentioned three kinds of raw materials, and the mass ratio of the potassium in the mixture, nitrate radical and water is 1: 2.05: 1.35; Mixture is 100 ℃ of stirring and dissolving conversion reactions, and the reaction times is 50 minutes, isolates NaCl and water-insoluble, and the saturated clear liquid of thermosol is cooled to 5 ℃, isolates 87.2g saltpetre, and it forms KNO
3Be 98.10%; The single transformation efficiency of potassium is 90.11%, and the saltpetre mother liquor after separating is returned the thermosol batching, and mother liquor is formed NaCl16.46%, KNO
37.92%, NaNO
321.44%, H
2O54.18%.
Embodiment two:
Potassium chloride 171.2g, its composition: KCl99.8%, other 0.2%; SODIUMNITRATE 193.3g, its composition: NaNO
399.5%, other is 0.5% years old; Saltpetre mother liquor 300g consists of NaCl16.46%, KNO
37.92%, NaNO
321.44%, H
2O54.18%; Its three kinds of raw materials are mixed, and the mass ratio of potassium, nitrate radical and water is 1: 2.0462: 1.642 in the mixture; Mixture is 90 ℃ of stirring and dissolving conversion reactions, and the reaction times is 60 minutes, isolates undissolved NaCl, and the saturated clear liquid of heat of solution is cooled to 5 ℃, and solid-liquid separation is separated 233.4g saltpetre, and it forms KNO
396.5%, other 3.5%, the yield of potassium is 95%, the saltpetre mother liquor after the separation returns the thermosol batching.
Claims (1)
1, a kind of novel method of utilizing salt lake potassium resource and sodium nitre to produce saltpetre, it is characterized in that potassium resource ore deposit, salt lake and natural sodium nitre and water and/or saltpetre mother liquor are mixed together, the mass ratio of regulating potassium, nitrate radical and water in the mixture is 1: (1.30-3.60): (1.0-4.00), make mixture under 30-100 ℃, carry out the heat of solution conversion reaction, reaction times is 15-60 minute, reaction back forms the solid-liquid mixed slurry, separate after filtration the saturated clear liquid of rubble salt, water-insoluble and thermosol; The saturated clear liquid of thermosol through being cooled to room temperature, is separated out saltpetre; Then the saltpetre mother liquor is returned thermosol stage batching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01115275 CN1371864A (en) | 2001-05-25 | 2001-05-25 | Novel method for preparing potassium nitrate by utilizing salt lake potassium resource and nitratine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01115275 CN1371864A (en) | 2001-05-25 | 2001-05-25 | Novel method for preparing potassium nitrate by utilizing salt lake potassium resource and nitratine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1371864A true CN1371864A (en) | 2002-10-02 |
Family
ID=4661848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01115275 Pending CN1371864A (en) | 2001-05-25 | 2001-05-25 | Novel method for preparing potassium nitrate by utilizing salt lake potassium resource and nitratine |
Country Status (1)
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| CN (1) | CN1371864A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102372294A (en) * | 2010-08-20 | 2012-03-14 | 中国地质大学（北京） | Method for preparing agricultural potassium nitrate by using nitratine and potassium-rich mother liquid |
| CN102910651A (en) * | 2012-11-19 | 2013-02-06 | 冯耀礼 | Counterflow circulation washing extraction method by using nitratine |
| CN103693661A (en) * | 2013-12-12 | 2014-04-02 | 中国中轻国际工程有限公司 | Process for producing high-purity potassium nitrate with low-quality raw materials |
-
2001
- 2001-05-25 CN CN 01115275 patent/CN1371864A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102372294A (en) * | 2010-08-20 | 2012-03-14 | 中国地质大学（北京） | Method for preparing agricultural potassium nitrate by using nitratine and potassium-rich mother liquid |
| CN102372294B (en) * | 2010-08-20 | 2013-11-13 | 中国地质大学（北京） | Method for preparing agricultural potassium nitrate by using nitratine and potassium-rich mother liquid |
| CN102910651A (en) * | 2012-11-19 | 2013-02-06 | 冯耀礼 | Counterflow circulation washing extraction method by using nitratine |
| CN103693661A (en) * | 2013-12-12 | 2014-04-02 | 中国中轻国际工程有限公司 | Process for producing high-purity potassium nitrate with low-quality raw materials |
| CN103693661B (en) * | 2013-12-12 | 2016-07-27 | 中国中轻国际工程有限公司 | A kind of technique producing high-purity potassium nitrate with lower quality feedstocks |
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