CN110408999A - A method of calcium sulfate crystal whiskers are produced using soda ash evaporated waste ammonia liquid - Google Patents
A method of calcium sulfate crystal whiskers are produced using soda ash evaporated waste ammonia liquid Download PDFInfo
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- CN110408999A CN110408999A CN201810400823.1A CN201810400823A CN110408999A CN 110408999 A CN110408999 A CN 110408999A CN 201810400823 A CN201810400823 A CN 201810400823A CN 110408999 A CN110408999 A CN 110408999A
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- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/10—Inorganic compounds or compositions
- C30B29/46—Sulfur-, selenium- or tellurium-containing compounds
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- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/60—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape characterised by shape
- C30B29/62—Whiskers or needles
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- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B7/00—Single-crystal growth from solutions using solvents which are liquid at normal temperature, e.g. aqueous solutions
- C30B7/14—Single-crystal growth from solutions using solvents which are liquid at normal temperature, e.g. aqueous solutions the crystallising materials being formed by chemical reactions in the solution
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- Crystallography & Structural Chemistry (AREA)
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- Organic Chemistry (AREA)
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- General Chemical & Material Sciences (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
A method of calcium sulfate crystal whiskers being produced using soda ash evaporated waste ammonia liquid, are related to calcium sulfate crystal whiskers production field.The present invention is not handled by for excessively high to pH value in evaporated waste ammonia liquid processing method, solid slag deposition, phenomena such as water resource waste, provide a kind of method using soda ash evaporated waste ammonia liquid production calcium sulfate crystal whiskers: by evaporated waste ammonia liquid cooled and filtered, the liquid to be processed for obtaining solid content < 100mg/L, is passed through CO thereto2Kiln gas, reaction obtain the salting liquid containing calcium carbonate；Then it is handled through concentrate, the clear liquid by the solid content of acquisition less than 100mg/L is mixed with sodium sulphate saturated solution, keeps the temperature 6-8 hours under the conditions of 100-105 DEG C, and obtained suspension obtains hemihydrate calcium sulfate crystal whisker through cooling, filtering, washing, drying.The present invention is suitable for the recycling and reusing of evaporated waste ammonia liquid, and has expanded the production method of calcium sulfate crystal whiskers.
Description
Technical field
The present invention relates to calcium sulfate crystal whiskers production fields, and in particular to a kind of brilliant using soda ash evaporated waste ammonia liquid production calcium sulfate
The method of palpus.
Background technique
The features such as ammonia-soda process soda ash is with a long history, technology maturation, product purity are high, high-quality.To China coast and
Salt Lake Area has huge advantage, but the waste liquid of the enormous amount that can generate of ammonia-soda process soda ash, waste residue, carbon dioxide are useless
Gas.Wherein evaporated waste ammonia liquid contains a large amount of calcium chloride, sodium chloride, and ammonia nitrogen, pH > 11, has a strong basicity at calcium hydroxide, corrosivity,
Salt-soda soil is caused to harden, the hardening soil threatens surrounding enviroment.A large amount of solid slags are precipitated in waste liquid library front end, and enormous amount causes to give up
Liquid Kuku, which holds, to be reduced, and tail library liquid level is continuously improved, and lagoon capacity is caused to reduce, and safe-guard line constantly reduces, to periphery ecology
Environment causes potential threat, and causes the waste of mineral resources.For the processing in evaporated waste ammonia liquid, at the existing place in coastal area
Reason method is to mix seawater largely to dilute the pH value in waste liquid and reduce direct emission after waste liquid temperature after natural sedimentation；Inland
The processing method in salt lake producing region is then to build large-scale waste liquid storage pool storage waste liquid and reduce by natural evaporation.Evaporated waste ammonia liquid is certainly
So contain alkalinity in the salts such as remaining solid slag, sodium chloride, calcium chloride after sunning evaporation, causes alkalization of soils.
Whisker is the important reinforcing component in composite material, in the material that metal, ceramics, rubber, plastics, resin etc. are matrix
Whisker is added in material, and the metal whisker reinforced composite haveing excellent performance can be made.Pole is shown when whisker is as modified reinforcing material
Good physics, chemical property and excellent mechanical performance.
Calcium sulfate crystal whiskers are typically referred to using gypsum as raw material, by artificially controlling, with single crystal form growth, are had equal
Even cross section, complete shape, the threadiness of perfect internal structure (must shape) monocrystal.There are Dihydrate gypsum whiskers, half
Point of H 2 O calcium sulphate whisker and anhydrous calcium sulfate whisker, their appearance is white fluffy solid.
Dihydrate gypsum whiskers are more than the humidification that whisker is not had when 110 DEG C of uses, and anhydrous and half-H 2 O calcium sulphate is brilliant
It must then intensity and use value with higher.Calcium sulfate crystal whiskers have excellent mechanical property, and good compatibility is excellent
Flatness, regenerability is good, non-toxic, and manufacturing cost is low, be mainly used for papermaking, the increase constituent element of composite material, friction material,
Environmental project filtering, asphalt modification, and improve adhesive force, temperature tolerance and the insulating properties of coating and paint.
The generation essence of calcium sulfate crystal whiskers is a dissolution → crystallization → dehydration process, and reaction equation is as follows:
CaSO4·2H2O (graininess) → Ca2++SO42-+2H2O
Ca2++SO42-+1/2H2O→CaSO4·1/2H2O (threadiness)
Summary of the invention
It is not handled by for excessively high to pH value in the existing evaporated waste ammonia liquid processing method in hinterland, solid slag deposition, water money
Phenomena such as source wastes, the present invention provides a kind of methods using soda ash evaporated waste ammonia liquid production calcium sulfate crystal whiskers, and raw material is using steaming
The gypsum of ammonia waste liquid and thenardite production, comprising the following steps:
1) it will be separated after evaporated waste ammonia liquid cooling, obtain the liquid to be processed of solid content < 5g/L；
2) the step 1) liquid to be processed filters after precipitation, and acquisition filtrate obtains solid content after concentrate is handled and is less than
The clear liquid of 100mg/L；
3) CO is passed through to the clear liquid of step 2)2Kiln gas, pH value are adjusted to 6-9, carry out carburizing reagent, and acquisition contains calcium carbonate
Salting liquid；
4) salting liquid containing calcium carbonate made from step 3) is handled through concentrate, obtains solid content less than 100mg/L's
Clear liquid is heated to 94-100 DEG C by clear liquid；
5) sodium sulphate saturated solution is heated to 80-94 DEG C；
6) clear liquid after step 4) heating is mixed with the calcium sulfate saturated solution after step 5) heating, at 100-105 DEG C,
Heat preservation 6-8 hours, obtain suspension after under the conditions of stirring rate 150rpm, are cooled to 60-70 DEG C, filtering；
7) it is dried after the filter cake washing obtained after step 6) filtering, obtains hemihydrate calcium sulfate crystal whisker.
Preferably, the mass ratio of the evaporated waste ammonia liquid and thenardite is evaporated waste ammonia liquid: thenardite=1000:140.
Preferably, the step 1) evaporated waste ammonia liquid is cooled to 40 DEG C.
Preferably, CO described in step 3)2CO in kiln gas2Volumetric concentration is 40%, the CO2With the volume of evaporated waste ammonia liquid
Than for (1.1~1.2): 1, the carburizing reagent time is 1h.
Preferably, the step 4) clear liquid is heated to 94 DEG C, and step 5) the sodium sulphate saturated solution is heated to 80 DEG C.
Preferably, the salting liquid containing calcium carbonate described in step 4) obtains the dope of solid content > 10g/L, warp after concentrate
It is concentrated, after filtering, than being rinsed for the clear water of 1:1, then under the conditions of 95 DEG C, dries 2h using with filter cake quality, obtain
Obtain nanometer calcium carbonate.
Preferably, step 5) the saturation sodium sulphate is that the anhydrous sodium sulfate for being 90% by every 200kg purity is dissolved in often
It is obtained after filtering in 410kg water.
Preferably, method for washing described in step 7) is, using 80 DEG C, with filter cake quality than being rushed for the clear water of 1:1
It washes.The drying refers under the conditions of 95 DEG C, dries 2h.The filter cake removes sodium chloride residue on filter cake after washing, obtains
The ejected wash water of sodium chloride-containing is obtained, after then mixing with the clear liquid containing residual hemihydrate calcium sulfate crystal whisker obtained after step 6) filtering
Concentrate is carried out, obtained clear liquid is the salting liquid of sodium chloride mass concentration 11%-13%.
Beneficial effect
For calcium sulfate crystal whiskers production aspect: existing gypsum fiber technology of preparing is belonged to using the natural gypsum as raw material
Mineral Transformation method.The gypsum fiber product purity of this method production depends on raw materials for production, and product whiteness is by raw materials for production and sets
Standby configuration influences significantly, to need to select different mineral resources according to market demands.And calcium chloride and sodium sulphate in evaporated waste ammonia liquid
Reaction can with arrive gypsum, be chemical transformation, purity is high, the good crystal whisker of gypsum of whiteness can be produced.It is useless that ammonia still process is reduced simultaneously
The discharge of liquid, the reuse with salt water.
Present invention utilizes the CO 2 waste gas generated during soda manufacture to handle evaporated waste ammonia liquid, and is produced from buying inland
Area's excess anhydrous sodium sulfate.By pretreatment, carbonization, the workshop sections such as calcium sulfate crystal whiskers reaction have respectively obtained half-H 2 O calcium sulphate crystalline substance
Must, nanometer calcium carbonate, and recycled sodium chloride, while also using CO 2 waste gas, emission reduction great amount of carbon dioxide.
It the problem of having reached the pollution of processing evaporated waste ammonia liquid improves water resource and utilizes, increase the purpose of new product.
Finally realize the effective components such as waste evaporated waste ammonia liquid, CO 2 waste gas during ammonia-soda process soda ash
Whole resource utilizations have achieved the purpose that waste recycling, have turned waste into wealth, and have opened up the production ways of calcium sulfate crystal whiskers.It improves
Low value-added gypsum is converted to the calcium sulfate whiskers of high added value by economic benefit.Industrial waste gas carbon dioxide subtracts
Row, one ton of waste water of every processing can emission reduction carbon 12g.
Specific embodiment
Heretofore described evaporated waste ammonia liquid water quality indicator is as shown in table 1:
1 evaporated waste ammonia liquid water quality of table
The method of the present invention using soda ash evaporated waste ammonia liquid production calcium sulfate crystal whiskers is detailed below.
The method of 1. soda ash evaporated waste ammonia liquid of embodiment production calcium sulfate crystal whiskers.
1) 1 ton of evaporated waste ammonia liquid is cooled to 40 DEG C from 90 DEG C.It is squeezed by pump and carries out initial gross separation in cyclone separator, removed
Sandstone particle makes solid content < 5g/L, enters settling tank afterwards；
2) clarified bucket staticly settles, and the dope of concentrate enters plate and frame filter press dehydration, output mud cake, and stacking is dried rear outer
Fortune, the filtrate of solid content < 1g/L enters tubular membrane removal impurity, when the solid content of clear liquid in tubular membrane is less than 100mg/L,
Into carbonators；
3) concentration 40%CO is passed through in the clear liquid obtained to step 2)2Kiln gas, stops 1h in carbonators, and pH value is adjusted to
6, the CO2With the volume ratio 1.2:1 of evaporated waste ammonia liquid, the salting liquid containing calcium carbonate is obtained；
4) salting liquid containing calcium carbonate made from step 3) is entered into tubular membrane concentrate, the dope of solid content > 10g/L
It into concentration tank, is concentrated into behind the 1/10 of original volume and is successively filtered by plate and frame filter press, the mud cake of acquisition uses mass ratio 1:1
Clear water be rinsed, through under the conditions of 95 DEG C dry 2h be made nanometer calcium carbonate；During clear liquid of the solid content less than 100mg/L enters
Between pond, be heated to 94 DEG C it is stand-by；
5) it takes 90% purity anhydrous sodium sulfate solid 200kg that 80 DEG C of 410kg of water is added, sulfuric acid is made after filtering
Sodium saturated solution, 80 DEG C of heat preservations；
6) it is put into simultaneously in gypsum reactor feed mouth by the clear liquid after step 4) heating and the sulfuric acid after step 5) heating
Sodium saturated solution, the CaCl in clear liquid2It is reacted with the sodium sulphate of addition and generates calcium sulfate and sodium chloride, react the suspension of acquisition
In, solid content reaches 107g/L, and sodium chloride concentration 12% guarantees temperature at 105 DEG C, stirring rate 150rpm, and heat preservation 6 is small
When；Suspension after heat preservation is discarded to pans by drain hole, is kept stirring speed 150rpm, and temperature is cooled to 70 DEG C；
Then it is filtered through plate and frame filter press and obtains hemihydrate calcium sulfate crystal whisker filter cake and the clear liquid containing a small amount of residual hemihydrate calcium sulfate crystal whisker；
7) filter cake obtained in step 6) uses 80 DEG C, and the clear water of mass ratio 1:1 is rinsed, and removal residual chloride sodium is residual
Object is stayed, the ejected wash water of sodium chloride-containing is obtained, after filter cake rinses, filter cake becomes loosely, then dries 2h under the conditions of 95 DEG C and obtains
Loose hemihydrate calcium sulfate crystal whisker.
Ejected wash water containing sodium chloride in the clear liquid containing residual hemihydrate calcium sulfate crystal whisker and step 7) that step 6) obtains
It is passed through tubular membrane concentrate after mixing, obtains NaCl salting liquid, soda manufacture can be back to use；The dope being obtained by filtration waits for calcium sulfate crystalline substance
Palpus solid content reaches 10% and is back to pans, reuses.
The hemihydrate calcium sulfate crystal whisker that the present embodiment obtains is shown in Table with by-product nanometer calcium carbonate, the yield of sodium chloride brine
Shown in 2.
The method of 2. soda ash evaporated waste ammonia liquid of embodiment production calcium sulfate crystal whiskers.
Embodiment 1 is repeated, is with the difference of embodiment 1:
Step 3) adjusts pH to 9, the CO2Volume mass ratio with evaporated waste ammonia liquid is 1.1:1；
Clear liquid of the solid content less than 100mg/L is heated to 100 DEG C in step 4)；
Sodium sulphate saturated solution in step 5) is heated to 94 DEG C；
Heat preservation is to keep the temperature 8 hours under the conditions of 102 DEG C described in step 6).
The hemihydrate calcium sulfate crystal whisker that the present embodiment obtains is shown in Table with by-product nanometer calcium carbonate, the yield of sodium chloride brine
Shown in 2.
The evaporated waste ammonia liquid per ton of table 2 can prepare the yield of hemihydrate calcium sulfate crystal whisker and by-product
| Hemihydrate calcium sulfate crystal whisker (kg) | Nanometer calcium carbonate (kg) | Sodium chloride brine (kg) | |
| Embodiment 1 | 167 | 2.1kg | 1280kg, NaCl concentration 11.4% |
| Embodiment 2 | 167 | 2.1kg | 1280kg, NaCl concentration 11.4% |
Claims (10)
1. a kind of method using soda ash evaporated waste ammonia liquid production calcium sulfate crystal whiskers, raw material are produced using evaporated waste ammonia liquid and thenardite
Gypsum, which comprises the following steps:
1) it will be separated after evaporated waste ammonia liquid cooling, obtain the liquid to be processed of solid content < 5g/L；
2) the step 1) liquid to be processed filters after precipitation, obtains filtrate and obtains solid content after concentrate is handled less than 100mg/
The clear liquid of L；
3) CO is passed through to the clear liquid of step 2)2Kiln gas, pH value are adjusted to 6-9, carry out carburizing reagent, obtain the salt containing calcium carbonate
Solution；
4) salting liquid containing calcium carbonate made from step 3) is handled through concentrate, obtains the clear liquid that solid content is less than 100mg/L,
Clear liquid is heated to 94-100 DEG C；
5) sodium sulphate saturated solution is heated to 80-94 DEG C；
6) clear liquid after step 4) heating is mixed with the calcium sulfate saturated solution after step 5) heating, at 100-105 DEG C, stirring
Heat preservation 6-8 hours, obtain suspension after under the conditions of rate 150rpm, are cooled to 60-70 DEG C, filtering；
7) it is dried after the filter cake washing obtained after step 6) filtering, obtains hemihydrate calcium sulfate crystal whisker.
2. a kind of method using soda ash evaporated waste ammonia liquid production calcium sulfate crystal whiskers according to claim 1, which is characterized in that
The mass ratio of the evaporated waste ammonia liquid and thenardite is evaporated waste ammonia liquid: thenardite=1000:140.
3. a kind of method using soda ash evaporated waste ammonia liquid production calcium sulfate crystal whiskers according to claim 1, which is characterized in that
Step 1) the evaporated waste ammonia liquid is cooled to 40 DEG C.
4. a kind of method using soda ash evaporated waste ammonia liquid production calcium sulfate crystal whiskers according to claim 1, which is characterized in that
CO described in step 3)2CO in kiln gas2Volumetric concentration is 40%, the CO2Volume ratio with evaporated waste ammonia liquid is (1.1~1.2):
1, the carburizing reagent time is 1h.
5. a kind of method using soda ash evaporated waste ammonia liquid production calcium sulfate crystal whiskers according to claim 1, which is characterized in that
Step 4) the clear liquid is heated to 94 DEG C, and step 5) the sodium sulphate saturated solution is heated to 80 DEG C.
6. a kind of method using soda ash evaporated waste ammonia liquid production calcium sulfate crystal whiskers according to claim 1, which is characterized in that
Salting liquid containing calcium carbonate described in step 4) obtains the dope of solid content > 10g/L after concentrate to be made after concentrated, filtering
With with filter cake quality, than being rinsed for the clear water of 1:1, then under the conditions of 95 DEG C, 2h is dried, obtains nanometer calcium carbonate.
7. a kind of method using soda ash evaporated waste ammonia liquid production calcium sulfate crystal whiskers according to claim 1, which is characterized in that
Step 5) the saturation sodium sulphate is that the anhydrous sodium sulfate for being 90% by every 200kg purity is dissolved in every 410kg water and passed through
It is obtained after filter.
8. a kind of method using soda ash evaporated waste ammonia liquid production calcium sulfate crystal whiskers according to claim 1, which is characterized in that
Method for washing described in step 7) is, using 80 DEG C, with filter cake quality than being rinsed for the clear water of 1:1.
9. a kind of method using soda ash evaporated waste ammonia liquid production calcium sulfate crystal whiskers according to claim 1, which is characterized in that
Step 7) the drying refers under the conditions of 95 DEG C, dries 2h.
10. a kind of method using soda ash evaporated waste ammonia liquid production calcium sulfate crystal whiskers according to claim 1, feature exist
In, the step 7) filter cake removes sodium chloride residue on filter cake after washing, obtain the ejected wash water of sodium chloride-containing, then with step
Concentrate is carried out after the clear liquid mixing containing residual hemihydrate calcium sulfate crystal whisker obtained after rapid 6) filtering, obtained clear liquid is sodium chloride
The salting liquid of mass concentration 11%-13%.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111547756A (en) * | 2020-05-22 | 2020-08-18 | 重庆盎瑞悦科技有限公司 | Treatment method of calcium chloride waste liquid containing organic matters |
| CN112877780A (en) * | 2021-01-14 | 2021-06-01 | 江西理工大学 | Method for preparing calcium sulfate hemihydrate crystal whisker by ammonia distillation waste liquid hydrothermal method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63103900A (en) * | 1986-10-17 | 1988-05-09 | Mitsubishi Metal Corp | Metal-coated anhydrous calcium sulfate whisker |
| CN101168852A (en) * | 2007-08-31 | 2008-04-30 | 武善东 | Mass production method for calcium sulfate whisker |
| CN104477962A (en) * | 2014-12-19 | 2015-04-01 | 华东理工大学 | Co-production method of calcium carbonate and hydrogen chloride gas by distilled ammonia waste liquid of sodium carbonate industry |
| CN104894650A (en) * | 2015-05-31 | 2015-09-09 | 四川理工学院 | Method for preparing calcium sulfate dihydrate whisker from mirabilite and calcium water |
-
2018
- 2018-04-28 CN CN201810400823.1A patent/CN110408999A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63103900A (en) * | 1986-10-17 | 1988-05-09 | Mitsubishi Metal Corp | Metal-coated anhydrous calcium sulfate whisker |
| CN101168852A (en) * | 2007-08-31 | 2008-04-30 | 武善东 | Mass production method for calcium sulfate whisker |
| CN104477962A (en) * | 2014-12-19 | 2015-04-01 | 华东理工大学 | Co-production method of calcium carbonate and hydrogen chloride gas by distilled ammonia waste liquid of sodium carbonate industry |
| CN104894650A (en) * | 2015-05-31 | 2015-09-09 | 四川理工学院 | Method for preparing calcium sulfate dihydrate whisker from mirabilite and calcium water |
Non-Patent Citations (1)
| Title |
|---|
| 蒋海斌等: "盐碱联合循环中制碱废液资源化利用的研究", 《中国井矿盐》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111547756A (en) * | 2020-05-22 | 2020-08-18 | 重庆盎瑞悦科技有限公司 | Treatment method of calcium chloride waste liquid containing organic matters |
| CN112877780A (en) * | 2021-01-14 | 2021-06-01 | 江西理工大学 | Method for preparing calcium sulfate hemihydrate crystal whisker by ammonia distillation waste liquid hydrothermal method |
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Application publication date: 20191105 |