CN109570194A - A kind of full recycling processing method of sodium sulfate salt slag - Google Patents
A kind of full recycling processing method of sodium sulfate salt slag Download PDFInfo
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- CN109570194A CN109570194A CN201811421459.3A CN201811421459A CN109570194A CN 109570194 A CN109570194 A CN 109570194A CN 201811421459 A CN201811421459 A CN 201811421459A CN 109570194 A CN109570194 A CN 109570194A
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- sodium sulfate
- sulfate salt
- solution
- treatment method
- salt slag
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- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 title claims abstract description 76
- 239000002893 slag Substances 0.000 title claims abstract description 38
- 238000004064 recycling Methods 0.000 title abstract description 17
- 238000003672 processing method Methods 0.000 title abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 41
- 229910052938 sodium sulfate Inorganic materials 0.000 claims abstract description 21
- 235000011152 sodium sulphate Nutrition 0.000 claims abstract description 21
- 239000003575 carbonaceous material Substances 0.000 claims abstract description 15
- 238000001704 evaporation Methods 0.000 claims abstract description 14
- 230000008020 evaporation Effects 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 239000007787 solid Substances 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000001953 recrystallisation Methods 0.000 claims abstract description 5
- 238000011084 recovery Methods 0.000 claims description 14
- 150000003839 salts Chemical group 0.000 claims description 14
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 11
- 238000000605 extraction Methods 0.000 claims description 5
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 10
- 238000000746 purification Methods 0.000 abstract description 7
- 238000012545 processing Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000013517 stratification Methods 0.000 abstract description 3
- 239000002910 solid waste Substances 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 description 11
- QPILZZVXGUNELN-UHFFFAOYSA-M sodium;4-amino-5-hydroxynaphthalene-2,7-disulfonate;hydron Chemical compound [Na+].OS(=O)(=O)C1=CC(O)=C2C(N)=CC(S([O-])(=O)=O)=CC2=C1 QPILZZVXGUNELN-UHFFFAOYSA-M 0.000 description 9
- 239000005416 organic matter Substances 0.000 description 7
- 239000002245 particle Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000001354 calcination Methods 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 229910021392 nanocarbon Inorganic materials 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 238000012824 chemical production Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 230000007096 poisonous effect Effects 0.000 description 2
- PANBYUAFMMOFOV-UHFFFAOYSA-N sodium;sulfuric acid Chemical compound [Na].OS(O)(=O)=O PANBYUAFMMOFOV-UHFFFAOYSA-N 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- ZZZCUOFIHGPKAK-UHFFFAOYSA-N D-erythro-ascorbic acid Natural products OCC1OC(=O)C(O)=C1O ZZZCUOFIHGPKAK-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 229930003268 Vitamin C Natural products 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000000729 antidote Substances 0.000 description 1
- 159000000009 barium salts Chemical class 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- 239000008141 laxative Substances 0.000 description 1
- 230000002475 laxative effect Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000004630 mental health Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- XDTRNDKYILNOAP-UHFFFAOYSA-N phenol;propan-2-one Chemical compound CC(C)=O.OC1=CC=CC=C1 XDTRNDKYILNOAP-UHFFFAOYSA-N 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007363 ring formation reaction Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 235000019154 vitamin C Nutrition 0.000 description 1
- 239000011718 vitamin C Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/80—Destroying solid waste or transforming solid waste into something useful or harmless involving an extraction step
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
- C01D5/16—Purification
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Nanotechnology (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention belongs to Industrial Solid Waste processing technology fields, disclose a kind of full recycling processing method of sodium sulfate salt slag.Sodium sulfate salt slag is handled in 250~600 DEG C of roasting temperatures, water stirring and dissolving is then added；Extractant and interface adjusting control agent is added under stirring condition into acquired solution, is stirred rear stratification, isolated upper and lower level solution；Upper solution obtained by step is centrifugally separating to obtain solid carbonaceous material, surplus solution evaporation recycling extractant；Lower layer's solution evaporation recrystallization recycling sodium sulphate.The method of the present invention simple process, at low cost, quick, treating capacity is big, purification is thorough, can be with full resource utilization sodium sulfate salt slag.
Description
Technical field
The invention belongs to Industrial Solid Waste processing technology fields, and in particular to a kind of full recycling treatment side of sodium sulfate salt slag
Method.
Background technique
The largely by-product Waste Sulfuric Acid sodium containing poisonous and harmful substances such as organic matter, tar is generated in many chemical production process
Salt slag, such as production phenol-acetone, formic acid, vitamin C, H acid device end can generate a large amount of sodium sulfate salt slags.And since it contains
It is high, easy to harden there are the poisonous and harmful substances such as organic matter tar, moisture content, and cannot be used directly as the raw material of industry, and its
Disposition is difficult, somewhat expensive, and many enterprises use warehouse stockpiling, outdoor placement or directly place to rivers and other places, causes warehouse
It occupies a large amount of soils or destroys soil, deteriorates water quality, pollution environment, living environment and physical and mental health to people around cause sternly
Weight is dangerous.Therefore how Low investment, low cost harmlessness disposing dangerous waste sodium sulfate salt slag and can efficiently high yield by its resource
Change and utilize, becomes industry significant problem urgently to be solved.
Substantially there is following four to the processing method of chemical production process by-product sodium sulfate salt slag at present: 1. desalinization of soil by flooding or leaching method: will
Waste salt dregs are washed with solvent, remove the toxic and harmful substance in desalination slag as far as possible, and the method scope of application is small, cost of investment
High, cleaning solvent can generate secondary pollution and processing waste effect is not thorough.2. high-temperature process method: the single use of abraum salt is returned
The Thermal Equipments such as rotary kiln, fluidized bed furnace carry out 800 DEG C or more high-temperature calcination processing, make the organic matter objectionable impurities in abraum salt in high temperature
Lower decomposition is oxidized to gaseous component.This method is insoluble be sodium sulfate salt slag at 600 DEG C or more as temperature increases, there is pole
Strong caking property, and the severe phenomenons such as melting, ring formation, agglomeration occur when being higher than salt fusing point, cause rotary kiln or fluidized bed furnace to set
It is standby to be unable to operate normally, it is difficult to realize industrialization.3. molten state facture: salt slag being heated to fusing point 884 by Thermal Equipment
DEG C or more, in the case where molten state, thermally decompose oxidation processes organic matter objectionable impurities.This method has equipment investment height, work
The disadvantages of skill is complicated.4. middle low-temperature treatment method: this method handles sodium sulfate salt slag by 600 DEG C of pyrolysis ovens below, generally
Residence time was at 4~10 hours.Organic matter objectionable impurities is thermally decomposed into volatile tail gas and is detached from solid salt under middle low temperature condition,
Reach harmless treatment, but the solid component after decomposition remains in solid salt surface, it is more difficult to produce pure white sodium sulfate crystal.It should
Treatment process is slow, and when industrialized production has the shortcomings that big cost of investment, low efficiency, yield are small.
Summary of the invention
In place of the above shortcoming and defect of the existing technology, the purpose of the present invention is to provide a kind of sodium sulfate salts
The full recycling processing method of slag.Organic matter is tentatively converted to small size nano-carbon material by low-carbon in the method for the present invention utilization
Or carbon quantum dot, carbon and sodium sulphate separation and recovery then will be obtained by surface and interface adjusting control agent in a two-phase system, it is creative
The method that ground has developed a kind of carbonizatin method and interface control method combination high added value full resource utilization sodium sulfate salt slag.
The object of the invention is achieved through the following technical solutions:
A kind of full recycling processing method of sodium sulfate salt slag, includes the following steps:
(1) sodium sulfate salt slag is handled in 250~600 DEG C of roasting temperatures, water stirring and dissolving is then added；
(2) extractant and interface adjusting control agent is added under stirring condition into step (1) acquired solution, is stood after being stirred
Layering, isolated upper and lower level solution；
(3) gained upper solution in step (2) is centrifugally separating to obtain solid carbonaceous material, surplus solution evaporation recycling extraction
Agent；Lower layer's solution evaporation recrystallization recycling sodium sulphate.
Further, the time of calcination process described in step (1) is 2~4h.
Further, extractant described in step (2) is n-hexane, the additional amount of extractant and the volume of institute's extraction solution
Than for 1:(1~10).
Further, interface adjusting control agent described in step (2) is enuatrol, and the additional amount of interface adjusting control agent is sodium sulfate salt
The 0.02%~0.2% of slag amount.
Further, centrifugal rotational speed described in step (3) is 6000~8000r/min, and centrifugation time is 5~8min.
Further, the temperature of the extractant of evaporation recycling described in step (3) is 50~100 DEG C.
Further, the temperature that recrystallization is evaporated described in step (3) is 80~120 DEG C, and the time is 2~4h.
The principle of the invention is as follows: under (250~600 DEG C) roasting heat treatment conditions of middle low temperature, having in sodium sulfate salt slag
The reactions such as thermal decomposition, oxidation, carbonization occur for machine object, so that organic matter converts small sized nano-carbon material or carbon quantum dot.
Then product of roasting is dissolved in two-phase solvent, then passes through the specific complexing power and oleophylic of interface adjusting control agent and carbon material
The small sized nano-carbon material of abraum salt inverted in solution and carbon quantum dot are carried out phase transfer, to realize carbon materials by hydrophobicity
The mutually separation of material and sodium sulphate, and recycle to obtain high-purity sulphuric acid sodium and high level carbon by recrystallization and physical separation in different phases
Material, and finally realize the high added value full resource utilization of sodium sulfate salt slag.
Processing method of the invention have the following advantages that and the utility model has the advantages that
(1) the method for the present invention simple process, at low cost, quick, treating capacity be big, purification thoroughly, can full recycling benefit
With sodium sulfate salt slag.
(2) using the sodium sulphate that the method for the present invention is extracted can be back to use again vulcanized sodium processed, paper pulp, glass, waterglass,
Enamel, and in the production such as antidote for being used as laxative and barium salt poisoning；Obtained carbon material resourcebility utilizes, and realizes and becomes useless
For treasured.
Detailed description of the invention
Fig. 1 is the exterior appearance figure of original sodium sulfate salt slag used in embodiment.
Fig. 2 is the exterior appearance figure of the sodium sulfate salt slag in embodiment after step (1) calcination process.
Fig. 3 is to handle stratification situation map through step (2) in embodiment.
Fig. 4 is to obtain the exterior appearance figure of black particle object carbon material through step (3) processing recycling in embodiment.
Fig. 5 is the exterior appearance figure for handling recycling purification sodium sulphate in embodiment through step (3).
Specific embodiment
Present invention will now be described in further detail with reference to the embodiments and the accompanying drawings, but embodiments of the present invention are unlimited
In this.
Embodiment 1
(1) the sodium sulfate salt slag of 5g H acid technique generation is weighed in crucible, is put into roasting 2 hours in Muffle furnace, roasting
Temperature is 250 DEG C；Solids after having roasted is dissolved in 20mL water, is all dissolved with magnetic stirrer to salt slurry；
(2) 15mL n-hexane and 0.01g enuatrol are added while stirring into the solution of step (1), continues to be stirred
For a period of time, it stands, apparent layering occurs for liquid level；
(3) it will be layered solution separation with separatory funnel, upper solution is centrifuged 8min through 6000r/min, and separation and recovery obtains
Black particle object carbon material, surplus solution recycle extractant in 50 DEG C of evaporations；Lower layer's solution is recrystallized in 80 DEG C of evaporation 4h, recycling
Purify sodium sulphate.
The present embodiment handles 5g H acid technique sodium sulfate salt slag, has recycled about 3.8g sodium sulphate, the rate of recovery 76%, product
Reach industrial anhydrous sodium sulfate (GB/T 6009-2014) II class Grade A standard after tested, the extractant rate of recovery is 88%.
Embodiment 2
(1) the sodium sulfate salt slag of 5g H acid technique generation is weighed in crucible, is put into roasting 2 hours in Muffle furnace, roasting
Temperature is 350 DEG C；Solids after having roasted is dissolved in 20mL water, is all dissolved with magnetic stirrer to salt slurry；
(2) 10mL n-hexane and 0.01g enuatrol are added while stirring into the solution of step (1), continues to be stirred
For a period of time, it stands, apparent layering occurs for liquid level；
(3) it will be layered solution separation with separatory funnel, upper solution is centrifuged 6min through 7000r/min, and separation and recovery obtains
Black particle object carbon material, surplus solution recycle extractant in 80 DEG C of evaporations；Lower layer's solution is recrystallized in 100 DEG C of evaporation 3h, is returned
Receive purification sodium sulphate.
The present embodiment handles 5g H acid technique sodium sulfate salt slag, has recycled about 4g sodium sulphate, the rate of recovery 80%, product warp
Test reaches industrial anhydrous sodium sulfate (GB/T 6009-2014) II class Grade A standard, and the extractant rate of recovery is 90%.
Embodiment 3
(1) the sodium sulfate salt slag of 5g H acid technique generation is weighed in crucible, is put into roasting 2 hours in Muffle furnace, roasting
Temperature is 400 DEG C；Solids after having roasted is dissolved in 20mL water, is all dissolved with magnetic stirrer to salt slurry；
(2) 10mL n-hexane and 0.01g enuatrol are added while stirring into the solution of step (1), continues to be stirred
For a period of time, it stands, apparent layering occurs for liquid level；
(3) it will be layered solution separation with separatory funnel, upper solution is centrifuged 5min through 8000r/min, and separation and recovery obtains
Black particle object carbon material, surplus solution recycle extractant in 100 DEG C of evaporations；Lower layer's solution is recrystallized in 120 DEG C of evaporation 2h, is returned
Receive purification sodium sulphate.
The present embodiment handles 5g H acid technique sodium sulfate salt slag, has recycled about 4.3g sodium sulphate, the rate of recovery 86%, product
Reach industrial anhydrous sodium sulfate (GB/T 6009-2014) II class Grade A standard after tested, the extractant rate of recovery is 90%.
Embodiment 4
(1) the sodium sulfate salt slag of 100g H acid technique generation is weighed in crucible, is put into roasting 2 hours in Muffle furnace, roasting
Burning temperature is 400 DEG C；Solids after having roasted is dissolved in 400mL water, is all dissolved with magnetic stirrer to salt slurry；
(2) 80mL n-hexane and 0.1g enuatrol are added while stirring into the solution of step (1), continues to be stirred one
The section time stands, and apparent layering occurs for liquid level；
(3) it will be layered solution separation with separatory funnel, upper solution is centrifuged 6min through 7000r/min, and separation and recovery obtains
Black particle object carbon material, surplus solution recycle extractant in 80 DEG C of evaporations；Lower layer's solution is recrystallized in 100 DEG C of evaporation 3h, is returned
Receive purification sodium sulphate.
The present embodiment handles 100g H acid technique sodium sulfate salt slag, has recycled about 87g sodium sulphate, and the rate of recovery 87% produces
Product reach industrial anhydrous sodium sulfate (GB/T 6009-2014) II class Grade A standard after tested, and the extractant rate of recovery is 92%.
The exterior appearance figure of original sodium sulfate salt slag used is as shown in Figure 1 in above embodiments；Through step (1) calcination process
Exterior appearance figure afterwards is as shown in Figure 2；It is as shown in Figure 3 through step (2) processing stratification situation；It handles and recycles through step (3)
The exterior appearance figure for obtaining black particle object carbon material is as shown in Figure 4；The appearance shape of recycling purification sodium sulphate is handled through step (3)
Looks figure is as shown in Figure 5.
As can be seen from the above results, the full recycling of high added value of sodium sulfate salt slag may be implemented in processing method of the present invention
It utilizes.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (7)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110586615A (en) * | 2019-09-02 | 2019-12-20 | 南京格洛特环境工程股份有限公司 | Continuous preparation process of saturated brine |
| CN114014338A (en) * | 2021-10-20 | 2022-02-08 | 中新国际联合研究院 | Method for preparing doped carbon by purifying sodium chloride through pyrolysis of organic waste salt |
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| CN103979576A (en) * | 2014-05-21 | 2014-08-13 | 中国科学院生态环境研究中心 | Method for evaporating and crystallizing salt slag from ammonium sulfate-containing organic wastewater |
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| CN107803395A (en) * | 2017-12-11 | 2018-03-16 | 广州叶林环保科技有限公司 | A kind of organic abraum salt low-temperature carbonization handling process |
| CN108220604A (en) * | 2018-01-03 | 2018-06-29 | 华南理工大学 | A kind of detoxification of chromium residue and the method for waste liqouor |
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| CN110586615A (en) * | 2019-09-02 | 2019-12-20 | 南京格洛特环境工程股份有限公司 | Continuous preparation process of saturated brine |
| CN114014338A (en) * | 2021-10-20 | 2022-02-08 | 中新国际联合研究院 | Method for preparing doped carbon by purifying sodium chloride through pyrolysis of organic waste salt |
| CN114014338B (en) * | 2021-10-20 | 2024-03-22 | 中新国际联合研究院 | Method for simultaneously preparing doped carbon by pyrolyzing and purifying sodium chloride from organic waste salt |
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