CN108046270A - A kind of recovery and treatment method of nitration mixture - Google Patents
A kind of recovery and treatment method of nitration mixture Download PDFInfo
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- CN108046270A CN108046270A CN201711339884.3A CN201711339884A CN108046270A CN 108046270 A CN108046270 A CN 108046270A CN 201711339884 A CN201711339884 A CN 201711339884A CN 108046270 A CN108046270 A CN 108046270A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/08—Compounds containing halogen
- C01B33/10—Compounds containing silicon, fluorine, and other elements
- C01B33/103—Fluosilicic acid; Salts thereof
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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
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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
- C01D9/08—Preparation by double decomposition
- C01D9/14—Preparation by double decomposition of salts of potassium with sodium nitrate
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/20—Halides
- C01F11/22—Fluorides
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Abstract
The present invention relates to a kind of recovery and treatment method of nitration mixture, the nitration mixture includes hydrofluoric acid, fluosilicic acid, nitric acid and hydrochloric acid, and this method includes：After nitration mixture is added in into a reaction kettle, nitration mixture is stirred, then sodium carbonate is at the uniform velocity added in after the reaction was complete, first time separation of solid and liquid is carried out to the mixed solution in reaction kettle to obtain the first supernatant and be stirred, barium carbonate is added in the reaction was complete, second of solid-liquid separation is carried out to the mixed solution in synthesis reactor to obtain the second supernatant；Sodium carbonate is added in, corresponding acid-base value is adjusted to default pH value, stirs until the reaction is complete to obtain mixing salt solution；Potassium chloride is added in into mixing salt solution, after being concentrated by evaporation and isolating sodium chloride crystal, mother liquor is diluted and potassium nitrate crystals are precipitated after being cooled to preset temperature.The recovery and treatment method of nitration mixture proposed by the present invention, Green-pollution, and a variety of crystalline products have been obtained, meet the growth requirement of Green Chemistry.
Description
Technical field
The present invention relates to chemical production technical field, more particularly to a kind of recovery and treatment method of nitration mixture.
Background technology
In photovoltaic industry, the production of polysilicon solar cell is an important step of the industrial chain.Polysilicon is too
The performance quality of positive energy battery will directly influence it in the status in market.Therefore, more and more enterprises just input is more
Resource is in the research and development operation of polysilicon solar cell.
At present, the preparation process of polysilicon solar cell generally comprises the conventional steps such as making herbs into wool, pickling and etching.And
It is both needed to use larger amount of nitration mixture in the production processes such as making herbs into wool, pickling and etching.Generally, it is wrapped in used nitration mixture
Hydrofluoric acid, fluosilicic acid, nitric acid and hydrochloric acid are included.
Polysilicon solar cell preparation after the completion of, in the waste water discharged still comprising hydrofluoric acid, fluosilicic acid, nitric acid with
And hydrochloric acid etc..If directly discharged without recovery processing, very big destruction can be caused to environment, is unfavorable for the hair of Green Chemistry
Exhibition.
The content of the invention
Based on this, the purpose of the present invention is to solve in the prior art, after the completion of polysilicon solar cell preparation,
Contain hydrofluoric acid, fluosilicic acid, nitric acid and hydrochloric acid etc. in the waste water of discharge, the problem of being damaged to environment.
The present invention proposes a kind of recovery and treatment method of nitration mixture, and the nitration mixture includes hydrofluoric acid, fluosilicic acid, nitric acid and salt
Acid, wherein, described method includes following steps：
After the nitration mixture is added in into a reaction kettle, the nitration mixture is stirred, then at the uniform velocity adds in sodium carbonate
To after the reaction was complete, first time separation of solid and liquid is carried out to the mixed solution in the reaction kettle to obtain the first supernatant；
After first supernatant is transferred in a synthesis reactor, first supernatant is stirred, it is then even
Speed adds in barium carbonate to second of solid-liquid separation after the reaction was complete, is carried out to the mixed solution in the synthesis reactor to obtain the
Two supernatants；
Sodium carbonate is added in into second supernatant, corresponding acid-base value is adjusted to default pH value, stirring is until anti-
Should mixing salt solution be obtained completely；
Potassium chloride is added in into the mixing salt solution, after being concentrated by evaporation and isolating sodium chloride crystal, mother liquor is carried out
It dilutes and potassium nitrate crystals is precipitated after being cooled to preset temperature.
The recovery and treatment method of nitration mixture proposed by the present invention is firstly added sodium carbonate and is carried out instead with the hydrofluoric acid in nitration mixture
Should, to remove the hydrofluoric acid in nitration mixture；Then adding in barium carbonate makes it be reacted with the hydrofluoric acid in nitration mixture, to remove nitration mixture
In hydrofluoric acid；Sodium carbonate is added in again, the hydrochloric acid in nitration mixture and nitric acid are removed, and is eventually adding potassium chloride and is carried out instead
Should, potassium nitrate and sodium chloride are obtained, is separated by way of evaporative crystallization, has been finally completed at the recycling to nitration mixture
Reason.The recovery and treatment method of nitration mixture proposed by the present invention, entire recovery processing process does not generate any pollution, and obtains
A variety of crystalline products have good organic efficiency, meet the demand of green chemistry.
The recovery and treatment method of the nitration mixture, wherein, it is described the nitration mixture is added in into a reaction kettle after, to institute
It states nitration mixture to be stirred, then at the uniform velocity adds in sodium carbonate into the step of the reaction was complete, the sodium carbonate and the fluorine of addition
The equivalent proportion of silicic acid is 2.05：1.
The recovery and treatment method of the nitration mixture, wherein, the solid obtained after the first time separation of solid and liquid is carried out as fluorine silicon
Sour sodium.
The recovery and treatment method of the nitration mixture, wherein, it is described that first supernatant is stirred, then at the uniform velocity add in
Barium carbonate is into the step of the reaction was complete, the barium carbonate of addition and the equivalent proportion 1.95~2.05 of the hydrofluoric acid：1.
The recovery and treatment method of the nitration mixture, wherein, obtained solid is fluorine after carrying out second of separation of solid and liquid
Change barium.
The recovery and treatment method of the nitration mixture, wherein, the pH range of the default pH value is 6.5~7.5.
The recovery and treatment method of the nitration mixture, wherein, in described the step of adding in potassium chloride into the mixing salt solution
In, the potassium chloride of addition is 2.05~2 with the equivalent proportion of the nitric acid:1.
The recovery and treatment method of the nitration mixture, wherein, the temperature range of the preset temperature is 4.5~5.5 DEG C.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
It obtains substantially or is recognized by the practice of the present invention.
Specific embodiment
For the ease of understanding the present invention, the present invention is described more fully below.The present invention can be with many differences
Form realize, however it is not limited to embodiment described herein.On the contrary, the purpose for providing these embodiments is made to this hair
Bright disclosure more thorough and comprehensive.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention
The normally understood meaning of technical staff is identical.Term used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein " and/or " include one or more phases
The arbitrary and all combination of the Listed Items of pass.
Polysilicon solar cell preparation after the completion of, in the waste water discharged still comprising hydrofluoric acid, fluosilicic acid, nitric acid with
And hydrochloric acid etc..If directly discharged without recovery processing, very big destruction can be caused to environment, is unfavorable for the hair of Green Chemistry
Exhibition.
In order to solve this technical problem, the present invention proposes a kind of recovery and treatment method of nitration mixture, and the nitration mixture includes
Hydrofluoric acid, fluosilicic acid, nitric acid and hydrochloric acid, wherein, described method includes following steps：
(1) after nitration mixture is added in into a reaction kettle, start mixer and nitration mixture is stirred, then at the uniform velocity add in carbon
Sour sodium carries out separation of solid and liquid to obtain the first supernatant to after the reaction was complete, to the mixed solution in reaction kettle.
Wherein, the equivalent proportion of the sodium carbonate of addition and fluosilicic acid is 2.05：1.It is obtained solid after separation of solid and liquid is carried out
Body is prodan, and prodan is cleaned, can do prodan sale of finished goods after drying.In this step, it is involved
Reaction equation be：
H2SiF6+Na2CO3→Na2SiF6↓+H2O+CO2↑
(2) after the first supernatant obtained above is transferred in a synthesis reactor, start mixer and be stirred, then
Barium carbonate is at the uniform velocity added in after the reaction was complete, separation of solid and liquid is carried out to the mixed solution in synthesis reactor to obtain the second supernatant.
Due to, still with the presence of hydrofluoric acid, adding in barium carbonate primarily to being carried out with hydrofluoric acid anti-in first supernatant
Should, to remove the hydrofluoric acid in nitration mixture.In the present invention, the equivalent proportion 1.95~2.05 of the barium carbonate of addition and hydrofluoric acid：1.
In this step, the solid for carrying out obtaining after separation of solid and liquid is barium fluoride.Reaction equation involved by this reaction step is：
2HF+BaCO3→BaF2↓+H2O+CO2↑
(3) sodium carbonate is added in into the second supernatant, corresponding acid-base value is adjusted to default pH value, stirring is until reaction
Completely to obtain mixing salt solution.
Due to still having excessive nitric acid and hydrochloric acid in the second supernatant for being obtained after separation of solid and liquid that the reaction was complete.For
Excessive nitric acid and hydrochloric acid are removed, a certain amount of sodium carbonate is added in this step and is reacted.Specific reaction end
It is subject to the pH value of mixed solution in reaction kettle.Namely the acid-base value of mixed solution in reaction kettle is adjusted to default pH value.At this
In invention, the scope of the default pH value is 6.5~7.5.When mixed solution PH in the range when, can conclude nitric acid substantially
And the reaction was complete with sodium carbonate for hydrochloric acid.Reaction equation involved by this step is：
2HNO3+Na2CO3→NaNO3+H2O+CO2↑
2HCl+Na2CO3→NaCl+H2O+CO2↑
(4) potassium chloride is added in into mixing salt solution, after being concentrated by evaporation and isolating sodium chloride crystal, mother liquor is carried out dilute
It releases and potassium nitrate crystals is precipitated after being cooled to preset temperature.
So far, the main component in mixing salt solution is sodium nitrate and sodium chloride.Since the solubility of sodium nitrate is high, it is
The two is separated, in the present invention, by adding in into the mixing salt solution potassium chloride, potassium chloride is reacted with sodium nitrate
Corresponding generation potassium nitrate and sodium chloride.Wherein, the equivalent proportion of the potassium chloride of addition and above-mentioned nitric acid is 2.05~2:1.Through evaporation
After concentrating and separating goes out sodium chloride crystal, mother liquor is diluted and potassium nitrate crystals are precipitated after being cooled to 4.5~5.5 DEG C.
The recovery and treatment method of nitration mixture proposed by the present invention is firstly added sodium carbonate and is carried out instead with the hydrofluoric acid in nitration mixture
Should, to remove the hydrofluoric acid in nitration mixture；Then adding in barium carbonate makes it be reacted with the hydrofluoric acid in nitration mixture, to remove nitration mixture
In hydrofluoric acid；Sodium carbonate is added in again, the hydrochloric acid in nitration mixture and nitric acid are removed, and is eventually adding potassium chloride and is carried out instead
Should, potassium nitrate and sodium chloride are obtained, is separated by way of evaporative crystallization, has been finally completed at the recycling to nitration mixture
Reason.The recovery and treatment method of nitration mixture proposed by the present invention, entire recovery processing process does not generate any pollution, and obtains
A variety of crystalline products have good organic efficiency, meet the demand of green chemistry.
Technical scheme is more at large illustrated with several specific embodiments below：
Embodiment one
1st, the mix acid liquor of recycling is added in a reaction kettle, starts mixer and the mix acid liquor is stirred, then
Sodium carbonate is evenly added in fully to be reacted.Wherein, the equivalent proportion of the sodium carbonate of addition and fluosilicic acid is 2.05：1.
2nd, after the reaction was complete in reaction kettle, separation of solid and liquid is carried out to the reaction solution in reaction kettle, is obtained after separation of solid and liquid
To solid it is cleaned, it is dry after can be used as prodan finished product and sold.
3rd, the reaction clear liquid obtained after separation of solid and liquid is added in into another synthesis reactor, then into the synthesis reactor evenly
Barium carbonate is added in the reaction was complete.Wherein, the equivalent proportion of the barium carbonate of addition and hydrogen fluoride is 2：1.
4th, after the reaction was complete in kettle to be synthesized, separation of solid and liquid, separation of solid and liquid are carried out to the mixed reaction solution in synthesis reactor
The solid obtained afterwards is barium fluoride, after drying can sale of finished goods.
5th, continue to be uniformly added into sodium carbonate in the reaction clear liquid obtained after separation of solid and liquid, adjust the pH value of mixed solution
For 7, clarified solution is taken to enter subsequent processing.
6th, potassium chloride is proportionally added into, wherein the potassium chloride added in is 2 with nitric acid equivalent proportion：1, then start mixer into
Row stirring, is evaporated concentration by solution afterwards until the reaction is complete, isolates byproduct sodium chloride while hot；It is again that mother liquor is suitably dilute
Release, slowly cool to 5 DEG C or so, potassium nitrate is precipitated, through centrifugal filtration, washing, it is dry after to get to product potassium nitrate.
Embodiment two
1st, the mix acid liquor of recycling is added in a reaction kettle, starts mixer and the mix acid liquor is stirred, then
Sodium carbonate is evenly added in fully to be reacted.Wherein, the equivalent proportion of the sodium carbonate of addition and fluosilicic acid is 2.05：1.
2nd, after the reaction was complete in reaction kettle, separation of solid and liquid is carried out to the reaction solution in reaction kettle, is obtained after separation of solid and liquid
To solid it is cleaned, it is dry after can be used as prodan finished product and sold.
3rd, the reaction clear liquid obtained after separation of solid and liquid is added in into another synthesis reactor, then into the synthesis reactor evenly
Barium carbonate is added in the reaction was complete.Wherein, the equivalent proportion of the barium carbonate of addition and hydrogen fluoride is 1.95： 1.
4th, after the reaction was complete in kettle to be synthesized, separation of solid and liquid, separation of solid and liquid are carried out to the mixed reaction solution in synthesis reactor
The solid obtained afterwards is barium fluoride, after drying can sale of finished goods.
5th, continue to be uniformly added into sodium carbonate in the reaction clear liquid obtained after separation of solid and liquid, adjust the pH value of mixed solution
For 7, clarified solution is taken to enter subsequent processing.
6th, potassium chloride is proportionally added into, wherein the potassium chloride added in is 2.05 with nitric acid equivalent proportion：1, then start stirring
Machine is stirred, and solution is evaporated concentration afterwards until the reaction is complete, isolates byproduct sodium chloride while hot；Mother liquor is fitted again
Work as dilution, slowly cool to 5 DEG C or so, potassium nitrate is precipitated, through centrifugal filtration, washing, it is dry after to get to product potassium nitrate.
Embodiment three
1st, the mix acid liquor of recycling is added in a reaction kettle, starts mixer and the mix acid liquor is stirred, then
Sodium carbonate is evenly added in fully to be reacted.Wherein, the equivalent proportion of the sodium carbonate of addition and fluosilicic acid is 2.05：1.
2nd, after the reaction was complete in reaction kettle, separation of solid and liquid is carried out to the reaction solution in reaction kettle, is obtained after separation of solid and liquid
To solid it is cleaned, it is dry after can be used as prodan finished product and sold.
3rd, the reaction clear liquid obtained after separation of solid and liquid is added in into another synthesis reactor, then into the synthesis reactor evenly
Barium carbonate is added in the reaction was complete.Wherein, the equivalent proportion of the barium carbonate of addition and hydrogen fluoride is 1.99： 1.
4th, after the reaction was complete in kettle to be synthesized, separation of solid and liquid, separation of solid and liquid are carried out to the mixed reaction solution in synthesis reactor
The solid obtained afterwards is barium fluoride, after drying can sale of finished goods.
5th, continue to be uniformly added into sodium carbonate in the reaction clear liquid obtained after separation of solid and liquid, adjust the pH value of mixed solution
For 6.5, clarified solution is taken to enter subsequent processing.
6th, potassium chloride is proportionally added into, wherein the potassium chloride added in is 2 with nitric acid equivalent proportion：1, then start mixer into
Row stirring, is evaporated concentration by solution afterwards until the reaction is complete, isolates byproduct sodium chloride while hot；It is again that mother liquor is suitably dilute
Release, slowly cool to 5 DEG C or so, potassium nitrate is precipitated, through centrifugal filtration, washing, it is dry after to get to product potassium nitrate.
Example IV
1st, the mix acid liquor of recycling is added in a reaction kettle, starts mixer and the mix acid liquor is stirred, then
Sodium carbonate is evenly added in fully to be reacted.Wherein, the equivalent proportion of the sodium carbonate of addition and fluosilicic acid is 2.05：1.
2nd, after the reaction was complete in reaction kettle, separation of solid and liquid is carried out to the reaction solution in reaction kettle, is obtained after separation of solid and liquid
To solid it is cleaned, it is dry after can be used as prodan finished product and sold.
3rd, the reaction clear liquid obtained after separation of solid and liquid is added in into another synthesis reactor, then into the synthesis reactor evenly
Barium carbonate is added in the reaction was complete.Wherein, the equivalent proportion of the barium carbonate of addition and hydrogen fluoride is 2.05： 1.
4th, after the reaction was complete in kettle to be synthesized, separation of solid and liquid, separation of solid and liquid are carried out to the mixed reaction solution in synthesis reactor
The solid obtained afterwards is barium fluoride, after drying can sale of finished goods.
5th, continue to be uniformly added into sodium carbonate in the reaction clear liquid obtained after separation of solid and liquid, adjust the pH value of mixed solution
For 7.5, clarified solution is taken to enter subsequent processing.
6th, potassium chloride is proportionally added into, wherein the potassium chloride added in is 2 with nitric acid equivalent proportion：1, then start mixer into
Row stirring, is evaporated concentration by solution afterwards until the reaction is complete, isolates byproduct sodium chloride while hot；It is again that mother liquor is suitably dilute
Release, slowly cool to 5 DEG C or so, potassium nitrate is precipitated, through centrifugal filtration, washing, it is dry after to get to product potassium nitrate.
In conclusion using the recovery and treatment method of above-described embodiment one to four, obtained prodan, barium fluoride,
The quality analysis results of potassium nitrate and sodium chloride product difference is as in the table below.
Table one：The prodan product quality analysis result recycled using the method for the present invention
Table two：The barium fluoride product quality analysis result recycled using the method for the present invention
Table three：The potassium nitrate product quality analysis results recycled using the method for the present invention
Table four：The sodium chloride product quality analysis result recycled using the method for the present invention
In conclusion the recovery and treatment method of nitration mixture proposed by the present invention, is firstly added sodium carbonate and the hydrogen fluorine in nitration mixture
Acid is reacted, to remove the hydrofluoric acid in nitration mixture；Then adding in barium carbonate makes it be reacted with the hydrofluoric acid in nitration mixture, with
Remove the hydrofluoric acid in nitration mixture；Sodium carbonate is added in again, and the hydrochloric acid in nitration mixture and nitric acid are removed, are eventually adding potassium chloride
It is reacted, obtains potassium nitrate and sodium chloride, separated by way of evaporative crystallization, be finally completed and nitration mixture is returned
Receipts processing.The recovery and treatment method of nitration mixture proposed by the present invention, entire recovery processing process does not generate any pollution, and obtains
A variety of crystalline products have been arrived, there is good organic efficiency, have met the demand of green chemistry.
Embodiment described above only expresses the several embodiments of the present invention, and description is more specific and detailed, but simultaneously
Cannot the limitation to the scope of the claims of the present invention therefore be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (8)
1. a kind of recovery and treatment method of nitration mixture, the nitration mixture includes hydrofluoric acid, fluosilicic acid, nitric acid and hydrochloric acid, and feature exists
In described method includes following steps：
After the nitration mixture is added in into a reaction kettle, the nitration mixture is stirred, then at the uniform velocity adds in sodium carbonate to anti-
After answering completely, first time separation of solid and liquid is carried out to the mixed solution in the reaction kettle to obtain the first supernatant；
After first supernatant is transferred in a synthesis reactor, first supernatant is stirred, is then at the uniform velocity added
Enter barium carbonate to after the reaction was complete, second of solid-liquid separation is carried out to the mixed solution in the synthesis reactor to obtain on second
Clear liquid；
Sodium carbonate is added in into second supernatant, corresponding acid-base value is adjusted to default pH value, stirring is until reacted
Entirely to obtain mixing salt solution；
Potassium chloride is added in into the mixing salt solution, after being concentrated by evaporation and isolating sodium chloride crystal, mother liquor is diluted
And potassium nitrate crystals are precipitated after being cooled to preset temperature.
2. the recovery and treatment method of nitration mixture according to claim 1, which is characterized in that it is described by the nitration mixture add in
After in one reaction kettle, the nitration mixture is stirred, then at the uniform velocity adds in sodium carbonate into the step of the reaction was complete, addition
The equivalent proportion of the sodium carbonate and the fluosilicic acid is 2.05：1.
3. the recovery and treatment method of nitration mixture according to claim 2, which is characterized in that carry out the first time separation of solid and liquid
The solid obtained afterwards is prodan.
4. the recovery and treatment method of nitration mixture according to claim 1, which is characterized in that it is described to first supernatant into
Then row stirring at the uniform velocity adds in barium carbonate into the step of the reaction was complete, the barium carbonate of addition and working as the hydrofluoric acid
Measure ratio 1.95~2.05：1.
5. the recovery and treatment method of nitration mixture according to claim 4, which is characterized in that carry out second of separation of solid and liquid
Obtained solid is barium fluoride afterwards.
6. the recovery and treatment method of nitration mixture according to claim 1, which is characterized in that the pH range of the default pH value
For 6.5~7.5.
7. the recovery and treatment method of nitration mixture according to claim 1, which is characterized in that described to the mixing salt solution
In the step of middle addition potassium chloride, the potassium chloride of addition is 2.05~2 with the equivalent proportion of the nitric acid:1.
8. the recovery and treatment method of nitration mixture according to claim 1, which is characterized in that the temperature range of the preset temperature
For 4.5~5.5 DEG C.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1843966A (en) * | 2006-04-28 | 2006-10-11 | 常州市裕和金属材料有限公司 | Method for treating waste acid liquor |
| CN101070167A (en) * | 2007-06-14 | 2007-11-14 | 上海文通化工有限公司 | Potassium nitrate preparing technology |
| CN102432036A (en) * | 2011-09-16 | 2012-05-02 | 江苏太阳宝新能源有限公司 | Treatment method of waste molten nitrate salt for solar thermal power generation and heat storage |
| CN103213991A (en) * | 2013-04-28 | 2013-07-24 | 苏州晶瑞化学有限公司 | Recovery and cyclic utilization technology for electronic-level waste acid mixture |
| CN204981156U (en) * | 2015-07-02 | 2016-01-20 | 苏州晶洲装备科技有限公司 | Recovery system of recycling of polycrystalline silicon making herbs into wool sculpture waste liquid |
-
2017
- 2017-12-14 CN CN201711339884.3A patent/CN108046270A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1843966A (en) * | 2006-04-28 | 2006-10-11 | 常州市裕和金属材料有限公司 | Method for treating waste acid liquor |
| CN101070167A (en) * | 2007-06-14 | 2007-11-14 | 上海文通化工有限公司 | Potassium nitrate preparing technology |
| CN102432036A (en) * | 2011-09-16 | 2012-05-02 | 江苏太阳宝新能源有限公司 | Treatment method of waste molten nitrate salt for solar thermal power generation and heat storage |
| CN103213991A (en) * | 2013-04-28 | 2013-07-24 | 苏州晶瑞化学有限公司 | Recovery and cyclic utilization technology for electronic-level waste acid mixture |
| CN204981156U (en) * | 2015-07-02 | 2016-01-20 | 苏州晶洲装备科技有限公司 | Recovery system of recycling of polycrystalline silicon making herbs into wool sculpture waste liquid |
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