CN106629784A - Process for producing rice-shaped crystalline potassium nitrate by brine mixing method - Google Patents
Process for producing rice-shaped crystalline potassium nitrate by brine mixing method Download PDFInfo
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- CN106629784A CN106629784A CN201611058700.1A CN201611058700A CN106629784A CN 106629784 A CN106629784 A CN 106629784A CN 201611058700 A CN201611058700 A CN 201611058700A CN 106629784 A CN106629784 A CN 106629784A
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- potassium nitrate
- rice
- cooling
- shaped
- crystallization
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D9/00—Nitrates of sodium, potassium or alkali metals in general
- C01D9/04—Preparation with liquid nitric acid
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D9/00—Nitrates of sodium, potassium or alkali metals in general
- C01D9/16—Purification
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D9/00—Nitrates of sodium, potassium or alkali metals in general
- C01D9/18—Preparation in the form of shaped products, e.g. granules
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- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses a process for producing rice-shaped crystalline potassium nitrate by a brine mixing method. The process comprises the following steps: reacting nitric acid, magnesium oxide and potassium chloride serving as raw materials; cooling for crystallization to obtain crude potassium nitrate; mixing a high-temperature solution and a low-temperature solution of the potassium nitrate according to a certain proportion by the brine mixing method; adding a potassium nitrate seed crystal at the same time; controlling the temperature and stirring speed of a mixed solution; crystalizing to obtain the rice-shaped crystalline potassium nitrate. In the production process, a reaction solution is heated by heat produced in a reaction of the nitric acid and the magnesium oxide, so that the reaction speed is high, and energy is saved; cooling crystallization is performed in a way of mixing brine and adding the seed crystal, so that the crystallization speed is high, the efficiency is high, and the obtained potassium nitrate product is an elliptical rice-shaped crystal, and has the advantages of high purity, low impurity content, large crystal particle size, uniform granularity, high fluidity, no tendency to agglomeration, convenience in use and wide application.
Description
Technical field
Present invention relates particularly to chemical products production technical field, and in particular to a kind of adding halogen method production rice-shaped crystallization nitre
The technique of sour potassium.
Background technology
In existing process for producing potassium nitrate, more using direct water-cooling or it is air-cooled by the way of crystallisation by cooling, gained potassium nitrate
Crystal is thinner, mostly powder, easily caking, in-convenience in use.Convention resolution method is addition anticaking agent, but have impact on product
Product purity, limits the purposes of product.
The content of the invention
In order to solve the deficiencies in the prior art, the present invention's produces rice-shaped crystallization potassium nitrate there is provided a kind of adding halogen method
Technique.
The present invention adopt technical solution be：A kind of adding halogen method production rice-shaped crystallizes the technique of potassium nitrate, including
Following steps：
（1）Nitric acid, magnesia and potassium chloride are pressed into mass fraction 5：1：3 ratio, input retort is reacted, after having reacted
It is filtered to remove insoluble matter impurity；
（2）By the filtrate crystallisation by cooling for obtaining, centrifugation, potassium nitrate crude product is obtained；
（3）Gained potassium nitrate crude product is added water, heating for dissolving is filtered, and obtains the pyrosol of potassium nitrate；（4）Potassium nitrate is high
Warm solution is proportionally added in crystallizer with the potassium nitrate cryogenic fluid after cooling, while potassium nitrate crystal seed is added, by control
The solution temperature freezed in but water rate control crystallizer is at 30～50 DEG C, and stirring, the potassium nitrate that crystallisation by cooling obtains rice-shaped is brilliant
Body；
（5）Centrifugation, drying obtains rice-shaped crystallization potassium nitrate product, and centrifugation gained filtrate returns to step（4）Followed
Ring.
Described step（4）The mass ratio of the middle potassium nitrate cryogenic fluid by after potassium nitrate pyrosol and cooling is 1:
1～3.
Described step（4）Middle mixing speed is 30～60 turns per minute.
The invention has the beneficial effects as follows：The invention provides a kind of adding halogen method production rice-shaped crystallizes the technique of potassium nitrate,
By being reacted as raw material with nitric acid, magnesia, potassium chloride, crystallisation by cooling obtains potassium nitrate crude product, then by adding halogen method, i.e.,
The pyrosol and cryogenic fluid of potassium nitrate are mixed by a certain percentage, while adding potassium nitrate crystal seed, mixeding liquid temperature is controlled
And mixing speed, crystallize the production technology of the potassium nitrate crystals for obtaining rice-shaped.The production technology is anti-using nitric acid and magnesia
The heat that should be produced is heated to reaction solution, and reaction speed is fast, and energy saving；Carry out by the way of halogen plus crystal seed using being converted
Crystallisation by cooling, crystallization rate is fast, efficiency high, and gained potassium nitrate product is a kind of oval rice-shaped crystal, and purity is high, impurity
Few, crystal particle diameter is larger and epigranular, and good fluidity is prevented from caking, easy to use, of many uses.
Description of the drawings
Fig. 1 is present invention production rice-shaped crystallization potassium nitrate process chart.
Specific embodiment
The present invention is further described in conjunction with Fig. 1,
High purity magnesium hydroxide preparation technology
Comprise the following steps：
（1）Nitric acid, magnesia and potassium chloride are pressed into mass fraction 5：1：3 ratio, input retort is reacted, after having reacted
It is filtered to remove insoluble matter impurity；
（2）By the filtrate crystallisation by cooling for obtaining, centrifugation, potassium nitrate crude product is obtained；
（3）Gained potassium nitrate crude product is added water, heating for dissolving is filtered, and obtains the pyrosol of potassium nitrate；（4）Potassium nitrate is high
Warm solution is 1 with the potassium nitrate cryogenic fluid example in mass ratio after cooling:1～3 is added in crystallizer, while adding potassium nitrate
Crystal seed, by the solution temperature in control cooling water inflow control crystallizer at 30～50 DEG C, stirring, mixing speed is per minute 30
～60 turns, crystallisation by cooling obtains the potassium nitrate crystals of rice-shaped；
（5）Centrifugation, drying obtains rice-shaped crystallization potassium nitrate product, and centrifugation gained filtrate returns to step（4）Followed
Ring.
By being reacted as raw material with nitric acid, magnesia, potassium chloride, crystallisation by cooling obtains potassium nitrate crude product to the present invention,
Again by adding halogen method, will potassium nitrate pyrosol and cryogenic fluid mix by a certain percentage, while add potassium nitrate crystal seed,
Control mixeding liquid temperature and mixing speed, crystallization obtains the production technology of the potassium nitrate crystals of rice-shaped.The production technology is utilized
The heat that nitric acid and oxidation reactive magnesium are produced is heated to reaction solution, and reaction speed is fast, and energy saving；Added using halogen is converted
The mode of crystal seed carries out crystallisation by cooling, and crystallization rate is fast, efficiency high, and gained potassium nitrate product is that a kind of oval rice-shaped is brilliant
Body, purity is high, and impurity is few, and crystal particle diameter is larger and epigranular, and good fluidity is prevented from caking, easy to use, of many uses.
The above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned enforcement
Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications
Should be regarded as protection scope of the present invention.
Claims (3)
1. the technique that a kind of adding halogen method production rice-shaped crystallizes potassium nitrate, it is characterised in that comprise the following steps：
（1）Nitric acid, magnesia and potassium chloride are pressed into mass fraction 5：1：3 ratio, input retort is reacted, after having reacted
It is filtered to remove insoluble matter impurity；
（2）By the filtrate crystallisation by cooling for obtaining, centrifugation, potassium nitrate crude product is obtained；
（3）Gained potassium nitrate crude product is added water, heating for dissolving is filtered, and obtains the pyrosol of potassium nitrate；（4）Potassium nitrate is high
Warm solution presses 1 with the potassium nitrate cryogenic fluid after cooling:1～3 mass ratio is added in crystallizer, while adding potassium nitrate brilliant
Kind, by control cooling water inflow control crystallizer in solution temperature at 30～50 DEG C, stirring, mixing speed be per minute 30～
60 turns, crystallisation by cooling obtains the potassium nitrate crystals of rice-shaped；
（5）Centrifugation, drying obtains rice-shaped crystallization potassium nitrate product, and centrifugation gained filtrate returns to step（4）Followed
Ring.
2. the technique that a kind of adding halogen method production rice-shaped according to claim 1 crystallizes potassium nitrate, it is characterised in that described
The step of（4）The mass ratio of the middle potassium nitrate cryogenic fluid by after potassium nitrate pyrosol and cooling is 1:1～3.
3. the technique that a kind of adding halogen method production rice-shaped according to claim 1 crystallizes potassium nitrate, it is characterised in that described
The step of（4）Middle mixing speed is 30～60 turns per minute.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611058700.1A CN106629784B (en) | 2016-11-28 | 2016-11-28 | A kind of technique of adding halogen method production rice-shaped crystallization potassium nitrate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611058700.1A CN106629784B (en) | 2016-11-28 | 2016-11-28 | A kind of technique of adding halogen method production rice-shaped crystallization potassium nitrate |
Publications (2)
| Publication Number | Publication Date |
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| CN106629784A true CN106629784A (en) | 2017-05-10 |
| CN106629784B CN106629784B (en) | 2018-05-29 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107117634A (en) * | 2017-05-28 | 2017-09-01 | 赵家春 | A kind of Production of Potassium Nitrate method |
| CN110862101A (en) * | 2019-12-25 | 2020-03-06 | 安徽胜达化工科技有限公司 | Preparation method of potassium nitrate |
| CN112645360A (en) * | 2020-11-05 | 2021-04-13 | 浙江联大化工股份有限公司 | Potassium nitrate tablet and production equipment and production process thereof |
| CN112875728A (en) * | 2021-02-07 | 2021-06-01 | 武汉世吉药业有限公司 | Preparation method of high-purity potassium nitrate and high-purity potassium nitrate |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1461439A (en) * | 2000-03-01 | 2003-12-10 | 索尼计算机娱乐公司 | Variable-mode PC card and input/output control device of PC card |
-
2016
- 2016-11-28 CN CN201611058700.1A patent/CN106629784B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1461439A (en) * | 2000-03-01 | 2003-12-10 | 索尼计算机娱乐公司 | Variable-mode PC card and input/output control device of PC card |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107117634A (en) * | 2017-05-28 | 2017-09-01 | 赵家春 | A kind of Production of Potassium Nitrate method |
| CN110862101A (en) * | 2019-12-25 | 2020-03-06 | 安徽胜达化工科技有限公司 | Preparation method of potassium nitrate |
| CN112645360A (en) * | 2020-11-05 | 2021-04-13 | 浙江联大化工股份有限公司 | Potassium nitrate tablet and production equipment and production process thereof |
| CN112875728A (en) * | 2021-02-07 | 2021-06-01 | 武汉世吉药业有限公司 | Preparation method of high-purity potassium nitrate and high-purity potassium nitrate |
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| CN106629784B (en) | 2018-05-29 |
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