CN101544399B - Method for directly producing potassium stannate by using tin raw material - Google Patents
Method for directly producing potassium stannate by using tin raw material Download PDFInfo
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- CN101544399B CN101544399B CN2009100476214A CN200910047621A CN101544399B CN 101544399 B CN101544399 B CN 101544399B CN 2009100476214 A CN2009100476214 A CN 2009100476214A CN 200910047621 A CN200910047621 A CN 200910047621A CN 101544399 B CN101544399 B CN 101544399B
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- potassium stannate
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Abstract
The invention discloses a method for directly producing potassium stannate by using a tin raw material, which comprises the following steps: (1) performing chemical reaction on tin, a tin alloy potassium hydroxide and an oxidizing agent in a reaction kettle at a temperature of between 300 and 600 DEG C to obtain granular crude potassium stannate, and during reaction, gradually adding the potassium hydroxide and the oxidizing agent into the melted tin and the tin alloy until the reaction is complete; (2) dissolving the granular crude potassium stannate with water; (3) refining and purifying the dissolved solution; and (4) condensing, separating and drying the potassium stannate solution obtained by refining and purificating to obtain a finished product. The method is used for directly producing the potassium stannate by using the tin raw material.
Description
Technical field
The present invention relates to a kind of production method of inorganic salt, particularly a kind of method of utilizing tin raw material direct production potassium stannate.
Technical background
Producing potassium stannate both at home and abroad at present all is to be raw material production with the refined tin, could obtain potassium stannate with technology such as transforming after the reaction of refined tin and concentrated nitric acid, can produce a large amount of nitrogen peroxide toxic gases in this production technique reaction process, production stage is many, big for environment pollution.Patent Office of the People's Republic of China is in disclosed application number a kind of novel method of producing potassium stannate that has been the disclosure of the Invention of 2006100109457 denominations of invention " new process for producing of potassium stannate " on December 6th, 2006, though this method than existing technical transform rate height, carries out not producing in the chemical reaction process two nitrogen oxide obnoxious flavoures; But it is many that this invention still exists production stage, as: earlier with chlorine reaction, again with alkali in and generate stannic acid, the stannic acid that generates is reacted with potassium hydroxide again; Special tin is that the reaction conditions with chlorine requires height, and chlorine itself belongs to hazardous substance and is difficult for taking place easily in transportation, the reaction interval toxic gas leakage.Therefore, press for a kind of method of effectively utilizing tin raw material direct production potassium stannate now.
Summary of the invention
The objective of the invention is to be to overcome the shortcoming of prior art, a kind of method of utilizing tin raw material direct production potassium stannate that a kind of production cost is low, technical process is few, the rate of recovery is high is provided.
For this reason, the invention provides a kind of method of utilizing tin raw material direct production potassium stannate, adopt tin raw material to produce, it may further comprise the steps: (1) is carried out chemical reaction with potassium hydroxide, oxygenant with tin and tin alloy and is made granular thick potassium stannate under 300 ℃ to 600 ℃ temperature in reactor; Reaction process is that potassium hydroxide and oxygenant are joined in the tin raw material of fusing step by step until reacting completely; (2) water dissolves granular thick potassium stannate; (3) solution is made with extra care purification; (4) the potassium stannate solution that will make with extra care the purification gained concentrates, separates, dries and make finished product.
Utilize in the method for tin raw material direct production potassium stannate at another kind provided by the invention, described oxygenant is a solid nitric acid potassium.The temperature of reaction of described tin and tin alloy and potassium hydroxide, saltpetre is 450 ℃ to 500 ℃, and is best in this temperature range internal reaction effect.In order to guarantee carrying out smoothly of chemical reaction, described chemical reaction under agitation carries out, institute is generated thick potassium stannate separate from mixture by stirring, the potassium stannate that reaction is generated by stirring is and floats to the surface on the particulate state, with the thick potassium stannate of the particulate state on surface take out potassium stannate slightly.In order to guarantee carrying out smoothly of chemical reaction, reduce and bring new impurity, described reactor is an iron pan, iron pan has the corrosion resistant advantage of heatproof.
Utilize in the method for tin raw material direct production potassium stannate at another kind provided by the invention, the described tin raw material that contains comprises that also the stanniferous amount is in the Sn-containing alloy more than 10 except that refined tin.Adopting Sn-containing alloy to produce potassium stannate helps the recovery of tin and reduces the raw materials for production cost.
Utilize in the method for tin raw material direct production potassium stannate at the another kind that invention provides, the dissolving of described thick potassium stannate is to grind dissolved with water in ball mill.Described refining purification is that granular thick potassium stannate is ground with water in ball mill, and process of lapping is not only a dissolution process efficiently, effective ways of removing impurity when going back simultaneously; The gained material be will grind and filtering and impurity removing, clarification carried out; Clear liquor is concentrated, dries separation, obtains finished product after drying in the chamber type electric resistance furnace by whizzer.
The method of utilizing tin raw material direct production potassium stannate that invention provides has the following advantages with respect to existing technology:
1. technology is simple: produce potassium stannate with the inventive method, save and earlier tin is made the tin flower, again with chlorine reaction, with the process of alkali neutralization reaction, reduced production stage, simplified production technique;
2. cost is low: because the present invention has reduced the technological process of production, and the concentration height of the potassium stannate that generates, shortened concentration time, thereby reduced production cost, the cost that adopts the present invention to produce potassium stannate has only about 70 percent of prior art production cost.
Description of drawings
Fig. 1 is the process flow diagram of an embodiment of a kind of method of utilizing tin raw material direct production potassium stannate provided by the invention.
Embodiment
With reference to Fig. 1, Fig. 1 is the process flow diagram of an embodiment of a kind of method of utilizing tin raw material direct production potassium stannate provided by the invention: stanniferous 80%, plumbous 20% tin raw material 1 are put into iron pan reactor 4, progressively add saltpetre 3 in the iron pan reactor 4, potassium hydroxide 2 carries out chemical reaction with the tin raw material 1 that has melted, stir in the reaction process the thick potassium stannate 5 of generation is floated to the top of iron pan reactor 4.Thick potassium stannate 5 is pulled out from the top of iron pan reactor 4; The thick potassium stannate 5 that will take out from iron pan reactor 4 is placed into and adds entry 7 in the abrasive roller 6 and grind, make thick potassium stannate 5 dissolvings by grinding, lysate after the dissolving is made with extra care purification 8, described refining purification 8 is that lysate is filtered, clarifies, with clarified liq concentrate, whizzer dries, the resulting potassium stannate of centrifuge dripping is placed in the drying baker 9 dries, obtain potassium stannate finished product 10.
Above-mentioned described embodiment is that the present invention will be described, is not that the present invention is limited.Design that the present invention is claimed and scope all are documented in claims of the present invention.
Claims (9)
1. method of utilizing tin raw material direct production potassium stannate, it comprises tin and tin alloy, it is characterized in that: it may further comprise the steps: (1) is melted the back with tin and tin alloy and is carried out chemical reaction with potassium hydroxide, oxygenant under 300 ℃ to 600 ℃ temperature and make granular thick potassium stannate in reactor; (2) water dissolves granular thick potassium stannate; (3) solution is made with extra care purification; (4) the potassium stannate solution that will make with extra care the purification gained concentrates, separates, dries and make finished product.
2. the method for utilizing tin raw material direct production potassium stannate according to claim 1 is characterized in that: described oxygenant is a solid nitric acid potassium.
3. the method for utilizing tin raw material direct production potassium stannate according to claim 1 is characterized in that: the temperature of reaction of described tin and tin alloy and potassium hydroxide, oxygenant is 450 ℃ to 500 ℃.
4. the method for utilizing tin raw material direct production potassium stannate according to claim 1 is characterized in that: described tin alloy is meant that the stanniferous amount is at the alloy more than 10.
5. the method for utilizing tin raw material direct production potassium stannate according to claim 1 is characterized in that: described chemical reaction under agitation carries out.
6. the method for utilizing tin raw material direct production potassium stannate according to claim 1 is characterized in that: described reactor is an iron pan.
7. the method for utilizing tin raw material direct production potassium stannate according to claim 1 is characterized in that: the dissolving of described thick potassium stannate is to grind dissolved with water in ball mill.
8. the method for utilizing tin raw material direct production potassium stannate according to claim 1 is characterized in that: described separation is to use the whizzer centrifugation.
9. the method for utilizing tin raw material direct production potassium stannate according to claim 1 is characterized in that: described oven dry is to carry out in chamber type electric resistance furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100476214A CN101544399B (en) | 2009-03-16 | 2009-03-16 | Method for directly producing potassium stannate by using tin raw material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100476214A CN101544399B (en) | 2009-03-16 | 2009-03-16 | Method for directly producing potassium stannate by using tin raw material |
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| Publication Number | Publication Date |
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| CN101544399A CN101544399A (en) | 2009-09-30 |
| CN101544399B true CN101544399B (en) | 2011-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100476214A Expired - Fee Related CN101544399B (en) | 2009-03-16 | 2009-03-16 | Method for directly producing potassium stannate by using tin raw material |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106882836A (en) * | 2017-02-17 | 2017-06-23 | 云南锡业股份有限公司化工材料分公司 | Application of the tin hemisphere in tin chemical products are prepared |
| CN108483484B (en) * | 2018-06-09 | 2021-04-13 | 赣州白塔金属材料有限公司 | Processing technology of potassium stannate |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101348276A (en) * | 2008-09-02 | 2009-01-21 | 云南锡业集团（控股）有限责任公司 | Alkali metal stannate production method |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101348276A (en) * | 2008-09-02 | 2009-01-21 | 云南锡业集团（控股）有限责任公司 | Alkali metal stannate production method |
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Granted publication date: 20110720 Termination date: 20140316 |