CN1843916A - Method for preparing high-purity potasium fluoride - Google Patents
Method for preparing high-purity potasium fluoride Download PDFInfo
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- CN1843916A CN1843916A CN 200510136327 CN200510136327A CN1843916A CN 1843916 A CN1843916 A CN 1843916A CN 200510136327 CN200510136327 CN 200510136327 CN 200510136327 A CN200510136327 A CN 200510136327A CN 1843916 A CN1843916 A CN 1843916A
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- repone
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- hydrogen fluoride
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Abstract
The invention relates to a method for conversing potassium chloride or mixture of potassium chloride and potassium fluoride to potassium fluoride of high purity by using HF gas under a certain temperature and pressure.
Description
Technical field:
A kind of new method for preparing Potassium monofluoride.
Background technology:
Potassium monofluoride is the mixture of a kind of Repone K and Potassium monofluoride as the Repone K that fluorizating agent participates in producing after the reaction, and conventional separation method separation difficulty finally can cause the waste of resource.The present invention utilizes principle from resource circulation, has invented a kind of utilization HF gas at this problem design, under certain temperature, pressure, the mixture of Repone K or Repone K and Potassium monofluoride is converted into the method for high-purity potasium fluoride.The mixture that the present invention promptly can be applied in Repone K and Potassium monofluoride is converted on the Potassium monofluoride, also can be applied in pure Repone K is converted on the Potassium monofluoride, not only solved the separation problem of Repone K and Potassium monofluoride mixture, also found a more economical route for the production of Potassium monofluoride.
Summary of the invention:
Characteristics of the present invention are that the mixture with Repone K or Repone K and Potassium monofluoride is raw material (logical refer to mention in the literary composition raw material), and the utilization hydrogen fluoride gas reacts, and comprising:
A, will be through the hydrogen fluoride gas of preheating, under negative pressure, constantly feed by the raw material bottom, keep temperature of reaction at 40～120 ℃, in tail gas, detects to go out chlorion, i.e. reaction end;
B, raw material is joined in the above-mentioned reactant in proportion, temperature control stage by stage, up to can not detecting chlorion, i.e. reaction finishes;
C, the reactant of above-mentioned b is carried out heat, hydrogen fluoride is decomposed, deviate to temperature at 300～600 ℃, obtains the high-purity potasium fluoride product.
The hydrogen fluoride gas of deviating from the reaction recycles under negative pressure.Hydrogen chloride gas becomes hydrochloric acid after water absorbs.
The present invention has really realized recycling of material, and the potassium ion total amount remains unchanged before and after the reaction, does not need additionally to add potassium hydroxide, salt of wormwood etc. again, has avoided accumulation of material, expansion, has saved production cost greatly.Simultaneously, also found a new path for the production of Potassium monofluoride.
The present invention is applicable to continous way production.
Embodiment:
The present invention is done the description in a step below by specific embodiment.
Embodiment one,
1000 gram raw materials (Potassium monofluoride content is 23%) are put in the tetrafluoro reactor of diameter 80mm, long 1200mm, be heated to 40 ℃, under negative pressure, by the hydrogen fluoride gas of reactor bottom feeding through preheating, tail gas directly enters another reactor and absorbs.Constantly detect the chloride ion content in the tail gas, be the reaction end up to can not detecting.Material is put in the special second reactor of diameter 80mm, long 1500mm by reactor bottom, add raw material in proportion, controlled temperature 120 ℃ three hours, be warmed up to 160 ℃ then and kept two hours, being warmed up to 200 ℃ again kept one hour, after being warmed up to 300 ℃ at last, reaction finishes, and material is directly transferred in the special high-temperature reactor, under negative pressure, continue to be warmed up to 500 ℃, stirring under the pulverizing, keep temperature to finish in two hours.Discharging promptly obtains high-purity potasium fluoride after the heat exchange cooling.Tail gas directly circulates and raw material reaction uses.
Embodiment two,
1000 gram raw materials (Potassium monofluoride content is 17%) are put in the tetrafluoro reactor of diameter 80mm, long 1200mm, be heated to 60 ℃, under negative pressure, by the hydrogen fluoride gas of reactor bottom feeding through preheating, tail gas directly enters another reactor and absorbs.Constantly detect the chloride ion content in the tail gas, be the reaction end up to can not detecting.Material is put in the special second reactor of diameter 80mm, long 1500mm by reactor bottom, add raw material in proportion, controlled temperature 120 ℃ three hours, be warmed up to 160 ℃ then and kept two hours, being warmed up to 200 ℃ again kept one hour, after being warmed up to 300 ℃ at last, reaction finishes, and material is directly transferred in the special high-temperature reactor, under negative pressure, continue to be warmed up to 450 ℃, stirring under the pulverizing, keep temperature to finish in two hours.Discharging promptly obtains high-purity potasium fluoride after the heat exchange cooling.Tail gas directly circulates and raw material reaction uses.
Embodiment three,
1000 gram raw materials (Potassium monofluoride content is 46%) are put in the tetrafluoro reactor of diameter 80mm, long 1200mm, be heated to 80 ℃, under negative pressure, by the hydrogen fluoride gas of reactor bottom feeding through preheating, tail gas directly enters another reactor and absorbs.Constantly detect the chloride ion content in the tail gas, be the reaction end up to can not detecting.Material is put in the special second reactor of diameter 80mm, long 1500mm by reactor bottom, add raw material in proportion, controlled temperature 120 ℃ three hours, be warmed up to 160 ℃ then and kept two hours, being warmed up to 200 ℃ again kept one hour, after being warmed up to 300 ℃ at last, reaction finishes, and material is directly transferred in the special high-temperature reactor, under negative pressure, continue to be warmed up to 550 ℃, stirring under the pulverizing, keep temperature to finish in two hours.Discharging promptly obtains high-purity potasium fluoride after the heat exchange cooling.Tail gas directly circulates and raw material reaction uses.
Claims (8)
1, a kind of utilization HF gas under certain temperature, pressure, is converted into the method for high-purity potasium fluoride with the mixture of Repone K or Repone K and Potassium monofluoride, comprising:
A, utilize hydrogen fluoride gas that the mixture of Repone K or Repone K and Potassium monofluoride is changed into the potassium hydrogen fluoride mixture;
B, in the potassium hydrogen fluoride mixture that above-mentioned reaction produces, add the mixture of Repone K or Repone K and Potassium monofluoride in proportion, stage by stage temperature control react product;
C, utilize heat, the product that above-mentioned b reaction is obtained changes into high-purity potasium fluoride.
2, according to the process of claim 1 wherein that used hydrogen fluoride is gas.
3, according to the process of claim 1 wherein that the temperature that produces the potassium hydrogen fluoride mixture is at 40～120 ℃.
4, according to the process of claim 1 wherein that the temperature of reaction of described b is at 120～300 ℃.
5, according to the process of claim 1 wherein that heat produces the temperature of high-purity potasium fluoride at 300～600 ℃.
6, according to the described method of arbitrary claim in the claim 1,2,3,5, wherein reaction is negative pressure, and unnecessary hydrogen fluoride gas recycles.
7, according to the process of claim 1 wherein that a, b, 3 of c promptly can be used as an integral body and advocate, also can distinguish separately and advocate.
8, according to the method for claim 1 to 7, in the preparation of the fluorochemical that can be applied in potassium, also should use in other the preparation of fluorochemical of metallic element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510136327 CN1843916A (en) | 2005-12-26 | 2005-12-26 | Method for preparing high-purity potasium fluoride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510136327 CN1843916A (en) | 2005-12-26 | 2005-12-26 | Method for preparing high-purity potasium fluoride |
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| Publication Number | Publication Date |
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| CN1843916A true CN1843916A (en) | 2006-10-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510136327 Pending CN1843916A (en) | 2005-12-26 | 2005-12-26 | Method for preparing high-purity potasium fluoride |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108584992A (en) * | 2018-07-12 | 2018-09-28 | 赣州有色冶金研究所 | A kind of method that vapor phase method prepares anhydrous lithium chloride |
| CN114436292A (en) * | 2022-02-21 | 2022-05-06 | 中船(邯郸)派瑞特种气体股份有限公司 | Treatment method of organic sylvite wastewater |
| CN116119684A (en) * | 2022-12-30 | 2023-05-16 | 承德莹科精细化工股份有限公司 | Preparation method of high-purity low-carbon crystalline potassium fluoride |
-
2005
- 2005-12-26 CN CN 200510136327 patent/CN1843916A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108584992A (en) * | 2018-07-12 | 2018-09-28 | 赣州有色冶金研究所 | A kind of method that vapor phase method prepares anhydrous lithium chloride |
| CN108584992B (en) * | 2018-07-12 | 2020-07-10 | 赣州有色冶金研究所 | Method for preparing anhydrous lithium chloride by gas phase method |
| CN114436292A (en) * | 2022-02-21 | 2022-05-06 | 中船(邯郸)派瑞特种气体股份有限公司 | Treatment method of organic sylvite wastewater |
| CN116119684A (en) * | 2022-12-30 | 2023-05-16 | 承德莹科精细化工股份有限公司 | Preparation method of high-purity low-carbon crystalline potassium fluoride |
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