CN110422903A - The processing method for the ammonium chloride waste-water that rare earth extraction separation generates - Google Patents
The processing method for the ammonium chloride waste-water that rare earth extraction separation generates Download PDFInfo
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- CN110422903A CN110422903A CN201910745499.1A CN201910745499A CN110422903A CN 110422903 A CN110422903 A CN 110422903A CN 201910745499 A CN201910745499 A CN 201910745499A CN 110422903 A CN110422903 A CN 110422903A
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
- B01J20/265—Synthetic macromolecular compounds modified or post-treated polymers
- B01J20/267—Cross-linked polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
- B01J20/28004—Sorbent size or size distribution, e.g. particle size
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
- B01J20/28011—Other properties, e.g. density, crush strength
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28016—Particle form
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
- B01J20/28057—Surface area, e.g. B.E.T specific surface area
- B01J20/28066—Surface area, e.g. B.E.T specific surface area being more than 1000 m2/g
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/12—Halogens or halogen-containing compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention discloses the processing methods for the ammonium chloride waste-water that a kind of separation of rare earth extraction generates, and include the steps that ammonium chloride waste-water passing through the resin column filled with cross-linked polymer；Wherein, the cross-linked polymer is formed by styrene and divinyl benzene polymer；Oil content in the ammonium chloride waste-water is 5~50mg/L；The flow velocity that ammonium chloride waste-water passes through resin column is 1~10m3/h.Oil content in this method treated ammonium chloride waste-water is low.
Description
Technical field
The present invention relates to the processing methods for the ammonium chloride waste-water that a kind of separation of rare earth extraction generates.
Background technique
Preparing rare earth element by Rare Earth Mine need to be by techniques such as ore dressing, water logging, precipitating and extractions.It can make in precipitation process
The precipitating reagent of the ammonium salts class such as ammonium carbonate or ammonium hydrogen carbonate is used, the waste water containing ammonium chloride is generated；It can pass through in extraction process
The saponification section of ammonia saponification, can also generate the waste water containing ammonium chloride.Currently, these to be contained to the Waste water concentrating of ammonium chloride, to return
Receive ammonium chloride.But oily would generally can be precipitated in concentration process containing a large amount of oil in the technique waste water containing ammonium chloride
Particulate matter blocks concentrator, influences normal operating.These oil are from hydroximic acid collecting agent used in ore dressing process
The organic compound generated under highly acid or hot conditions, extractant and diluent used in extraction process, precipitating
Surfactant etc. in agent.
CN102531025A discloses a kind of processing method of rare earth ammonium chloride wastewater: (1) dissolving rare earth chloride, filter
Rare earth chloride liquid is obtained after removal of impurities；(2) dilution agent will be extracted with kerosene, then will be saponified with ammonium hydroxide；(3) chlorination after removal of impurities is dilute
Earth material liquid is mixed, is stood with organic after saponification, makes ammonium chloride raffinate and the organic phase separation containing rare earth element；(4)
Obtained ammonium chloride raffinate is returned into step (1), repeats step (1)~(3), is recycled 2~5 times；(5) with hydrochloric acid to step
(3) organic phase isolated is stripped, and rare earth chloride back extraction extraction raffinate is obtained；(6) more than the rare earth chloride back extraction obtained to step (5)
Ammonium hydrogen carbonate or ammonium carbonate precipitating reagent are added in liquid, obtains carbonated rare earth precipitating, carbonated rare earth precipitates return step (1)；(7) it uses
Water washing carbonated rare earth precipitating, cleaning solution return step (6)；(8) 1/ of ammonium chloride raffinate volume made from extraction step (4)
3~1/2, through oil removing, it is concentrated by evaporation；(9) by the liquid crystallisation by cooling after evaporation and concentration, ammonia chloride crystal is precipitated through centrifugation point
From, it is dry after chlorination ammonium product, crystal mother liquor return step (8).This method is using oil water separator to ammonium chloride raffinate
Carry out oil removal treatment, oil content is higher in the ammonium chloride waste-water after oil removing, influence to be concentrated by evaporation and etc. progress.
CN104140174A discloses a kind of combination treatment method of rare earth extraction separating ammonium chloride waste water: (1) by chlorination
Ammonium waste water carries out oil removal, homogeneous, Air Exposure according to different concentration respectively；Again to ammonium chloride waste-water carry out electric flocculation demulsification,
Oil removal by air bubbling and the active powdered carbon depth oil removing of addition；It is then placed in after adjusting pH in stirring pool and soluble phosphate is added, remove
The heavy metal ion such as calcium and magnesium；Ammonium salt waste water enters coagulative precipitation tank and aging tank, and sufficiently sedimentation ageing, supernatant passes through multimedium
Filtering, active carbon filtering and the pretreatment of UF ultra-filtration filters, send the waste water of above-mentioned processing into NF nanofiltration equipment and further pre-process；
(2) by treated, ammonium chloride waste-water carries out electrodialysis and seawater desalination reverse osmosis film process, is then evaporated crystallization treatment.
This method complex process, it is at high cost.
Summary of the invention
In view of this, the processing of the ammonium chloride waste-water generated the object of the present invention is to provide a kind of separation of rare earth extraction
The oil content in ammonium chloride waste-water can be effectively reduced in method, this method.The present invention adopts the following technical scheme that realization is above-mentioned
Purpose.
The present invention provides a kind of processing method of the rare earth extraction ammonium chloride waste-water that separation generates, including by ammonium chloride waste-water
By be filled with cross-linked polymer resin column the step of；
Wherein, the cross-linked polymer is formed by styrene and divinyl benzene polymer；In the ammonium chloride waste-water
Oil content be 5~50mg/L；The flow velocity that ammonium chloride waste-water passes through resin column is 1~10m3/h。
Processing method according to the present invention, it is preferable that the pH of the ammonium chloride waste-water is 2~6.5.
Processing method according to the present invention, it is preferable that the oil content in the ammonium chloride waste-water is 5~30mg/L.
Processing method according to the present invention, it is preferable that the oil content in the ammonium chloride waste-water is 5~20mg/L.
Processing method according to the present invention, it is preferable that the concentration of ammonium chloride is 1~8mol/ in the ammonium chloride waste-water
L。
Processing method according to the present invention, it is preferable that the flow velocity that ammonium chloride waste-water passes through resin column is 1~7m3/h。
Processing method according to the present invention, it is preferable that the specific surface area of the cross-linked polymer is not less than 900m2/g。
Processing method according to the present invention, it is preferable that the wet apparent density of the cross-linked polymer is 0.50~0.90g/
Ml, and wet true density is 1.00~1.50g/ml.
Processing method according to the present invention, it is preferable that the cross-linked polymer be resin particle, and partial size be 0.2~
Resin particle content within the scope of 2.00mm is 85%~100%.
Processing method according to the present invention, it is preferable that the ratio between the diameter of the resin column and height are 1:3~20.
The present invention passes through ammonium chloride waste-water filled with cross-linked polymer made of styrene and divinyl benzene polymer
Resin column can remove effectively the oil in ammonium chloride waste-water, to guarantee to recycle ammonium chloride in ammonium chloride waste-water evaporative crystallization
During will not there is a phenomenon where block evaporation equipment.Preferred technical solution according to the present invention, ammonium chloride waste-water with 1~
7m3The flow velocity of/h can be obtained in this way by the resin column of cross-linked polymer made of filling styrene and divinyl benzene polymer
To the less ammonium chloride waste-water of oil content.
Specific embodiment
The present invention is further illustrated combined with specific embodiments below, but protection scope of the present invention is not limited to
This.
The processing method of rare earth extraction separating ammonium chloride waste water, including by ammonium chloride waste-water by being filled with cross-linked polymer
Resin column the step of；Wherein, the cross-linked polymer is formed by styrene and divinyl benzene polymer.Ammonium chloride waste-water can
Think ammonium chloride waste-water and/or ammonia saponification of the precipitating reagent of the ammonium salts class such as ammonium carbonate or ammonium hydrogen carbonate generated in precipitation process
Saponification section ammonium chloride waste-water generated.
In the present invention, the flow velocity that ammonium chloride waste-water passes through the resin column filled with cross-linked polymer is 1~10m3/h.It is excellent
Selection of land, the flow velocity that ammonium chloride waste-water passes through the resin column filled with cross-linked polymer are 1~7m3/h.It is highly preferred that ammonium chloride is useless
The flow velocity that water passes through the resin column filled with cross-linked polymer is 1~4m3/h.The oily quilt in ammonium chloride waste-water can both have been made in this way
Sufficiently absorption, diffusion, it is also ensured that oily removal efficiency more effectively reduces the oil content in ammonium chloride waste-water.
In the present invention, the oil in ammonium chloride waste-water may come from hydroximic acid collecting agent used in ore dressing process
The organic compound generated under highly acid or hot conditions, extractant and diluent or precipitating used in extraction process
One of surfactant in agent is a variety of, and the extractant can be 2- ethylhexyl phosphoric acid single 2-ethyl hexyl ester
(P507), the diluent can be kerosene.Oil content in ammonium chloride waste-water can be 5~50mg/L.Preferably, chlorination
Oil content in ammonium waste water is 5~30mg/L.It is highly preferred that the oil content in ammonium chloride waste-water is 5~20mg/L.It in this way can be with
Guarantee the removal effect of oil, the oil content in ammonium chloride waste-water made is lower.
In the present invention, the pH of ammonium chloride waste-water can be 2~6.5.Preferably, the pH of ammonium chloride waste-water is 3~6.5.
It is highly preferred that the pH of ammonium chloride waste-water is 4~6.5.It can achieve better deoiling effect in this way, the ammonium chloride waste-water made
In oil content it is lower.
In the present invention, the concentration of ammonium chloride is 1~8mol/L in ammonium chloride waste-water.Preferably, chlorine in ammonium chloride waste-water
The concentration for changing ammonium is 1~5mol/L.It is highly preferred that the concentration of ammonium chloride is 1~3mol/L in ammonium chloride waste-water.
The cross-linked polymer as made of styrene and divinyl benzene polymer in the present invention can be obtained using conventional method
.For example, styrene and divinylbenzene are obtained cross-linked polymer by the method for suspension polymerisation.Cross-linked polymeric of the invention
Object is not limited by suspension polymerisation acquisition, can also be obtained by the method for the routine such as polymerisation in solution, emulsion polymerization.
In the present invention, the specific surface area of cross-linked polymer is not less than 900m2/g.Preferably, the ratio table of cross-linked polymer
Area is not less than 1200m2/g.It is highly preferred that the specific surface area of cross-linked polymer is not less than 1500m2/g.It can guarantee to gather in this way
Close the adsorption capacity of object, the oil content in ammonium chloride waste-water reduced.
In the present invention, the wet apparent density of cross-linked polymer can be 0.50~0.90g/ml, and wet true density is 1.00
~1.50g/ml.Preferably, wet apparent density is 0.60~0.80g/ml.It is highly preferred that wet apparent density is 0.65~0.75g/ml.
Preferably, wet true density is 1.05~1.30g/ml.It is highly preferred that wet true density is 1.05~1.15g/ml.It can protect in this way
The adsorption capacity of polymer is demonstrate,proved, to reduce the oil content in obtained ammonium chloride waste-water.
In the present invention, cross-linked polymer is resin particle, and resin particle of the partial size within the scope of 0.2~2.00mm contains
Amount is 85%~100%.Preferably, resin particle content of the partial size within the scope of 0.4~1.25mm is 85%~100%.More
Preferably, resin particle content of the partial size within the scope of 0.4~1.25mm is 95%~100%.Its aperture of granular resin
It is more uniform, be conducive to adsorb the oil in middle heavy rare earth chloride solution, to reduce in obtained ammonium chloride waste-water
Oil content.
In the present invention, the ratio between the diameter of resin column and height are 1:3~20.Preferably, the diameter of resin column and height
The ratio between be 1:5~15.It is highly preferred that the ratio between the diameter of resin column and height are 1:7~12.A specific reality according to the present invention
Mode is applied, the ratio between the diameter of resin column and height are 1:10.It can not only guarantee the rate of absorption in this way, but also tree can be made full use of
Rouge reaches maximal absorptive capacity.
Oil in following embodiment in ammonium chloride waste-water is from hydroximic acid collecting agent in highly acid or hot conditions
The organic compound of lower generation, 2- ethylhexyl phosphoric acid single 2-ethyl hexyl ester (P507), the surface-active in kerosene and precipitating reagent
Agent.
The performance for the cross-linked polymer that styrene and divinylbenzene used in the following embodiment are formed is referring to following table.
Table 1
Oil content is tested with the following method in the ammonium chloride waste-water of following embodiment:
Chlorination is measured using " the measurement infrared spectrophotometer of water-quality petroleum and animals and plants oils " (HJ637-2012)
Oil content in ammonium waste water.Under the conditions of as defined in this standard, organic impurities is referred to by carbon tetrachloride extraction and in wave number
For 2930cm-1、2960cm-1、3030cm-1There is the substance of characteristic absorption at all or part of bands of a spectrum, it is main including petroleum-type and dynamic
Plant oil.
Embodiment 1
By rare earth extraction separating ammonium chloride waste water (the concentration 2.25mol/L, pH 4 of ammonium chloride, oil content 30mg/L)
At room temperature, with 6.5m3The flow of/h passes through filled with the cross-linked polymer as made of styrene and divinyl benzene polymer
Resin column (the ratio between the diameter of resin column and height are 1:10).Detection is contained by the oil in resin column treated ammonium chloride waste-water
Amount, acquired results are shown in Table 2.
Embodiment 2
By rare earth extraction separating ammonium chloride waste water (the concentration 2.25mol/L, pH 5 of ammonium chloride, oil content 25mg/L)
At room temperature, with 6.5m3The flow of/h passes through filled with the cross-linked polymer as made of styrene and divinyl benzene polymer
Resin column (the ratio between the diameter of resin column and height are 1:10).Detection is contained by the oil in resin column treated ammonium chloride waste-water
Amount, acquired results are shown in Table 2.
Embodiment 3
By rare earth extraction separating ammonium chloride waste water (the concentration 2.25mol/L, pH 6 of ammonium chloride, oil content 15mg/L)
At room temperature, with 6.5m3The flow of/h passes through filled with the cross-linked polymer as made of styrene and divinyl benzene polymer
Resin column (the ratio between the diameter of resin column and height are 1:10).Detection is contained by the oil in resin column treated ammonium chloride waste-water
Amount, acquired results are shown in Table 2.
Embodiment 4
By rare earth extraction separating ammonium chloride waste water (the concentration 2.25mol/L, pH 6 of ammonium chloride, oil content 15mg/L)
At room temperature, with 8m3The flow of/h passes through the tree filled with the cross-linked polymer as made of styrene and divinyl benzene polymer
Rouge column (the ratio between the diameter of resin column and height are 1:10).Detection is contained by the oil in resin column treated ammonium chloride waste-water
Amount, acquired results are shown in Table 2.
Embodiment 5
By rare earth extraction separating ammonium chloride waste water (the concentration 2.25mol/L, pH 6 of ammonium chloride, oil content 40mg/L)
At room temperature, with 6.5m3The flow of/h passes through filled with the cross-linked polymer as made of styrene and divinyl benzene polymer
Resin column (the ratio between the diameter of resin column and height are 1:10).Detection is contained by the oil in resin column treated ammonium chloride waste-water
Amount, acquired results are shown in Table 2.
Embodiment 6
By rare earth extraction separating ammonium chloride waste water (the concentration 2.25mol/L, pH 6 of ammonium chloride, oil content 15mg/L)
At room temperature, with 3m3The flow of/h passes through the tree filled with the cross-linked polymer as made of styrene and divinyl benzene polymer
Rouge column (the ratio between the diameter of resin column and height are 1:10).Detection is contained by the oil in resin column treated ammonium chloride waste-water
Amount, acquired results are shown in Table 2.
Comparative example 1
By rare earth extraction separating ammonium chloride waste water (the concentration 2.25mol/L, pH 6 of ammonium chloride, oil content 70mg/L)
At room temperature, with 6.5m3The flow of/h passes through filled with the cross-linked polymer as made of styrene and divinyl benzene polymer
Resin column (the ratio between the diameter of resin column and height are 1:10).Detection is contained by the oil in resin column treated ammonium chloride waste-water
Amount, acquired results are shown in Table 2.
Comparative example 2
By rare earth extraction separating ammonium chloride waste water (the concentration 2.25mol/L, pH 6 of ammonium chloride, oil content 30mg/L)
At room temperature, with 12m3The flow of/h passes through the tree filled with the cross-linked polymer as made of styrene and divinyl benzene polymer
Rouge column (the ratio between the diameter of resin column and height are 1:10).Detection is contained by the oil in resin column treated ammonium chloride waste-water
Amount, acquired results are shown in Table 2.
Table 2
Present invention is not limited to the embodiments described above, without departing from the essence of the present invention, this field skill
Any deformation, improvement, the replacement that art personnel are contemplated that each fall within the scope of the present invention.
Claims (10)
1. the processing method for the ammonium chloride waste-water that a kind of separation of rare earth extraction generates, which is characterized in that including by ammonium chloride waste-water
By be filled with cross-linked polymer resin column the step of；
Wherein, the cross-linked polymer is formed by styrene and divinyl benzene polymer；Oil in the ammonium chloride waste-water
Content is 5~50mg/L；The flow velocity that ammonium chloride waste-water passes through resin column is 1~10m3/h。
2. according to right want 1 described in processing method, which is characterized in that the pH of the ammonium chloride waste-water be 2~6.5.
3. processing method according to claim 1, which is characterized in that oil content in the ammonium chloride waste-water is 5~
30mg/L。
4. processing method according to claim 3, which is characterized in that oil content in the ammonium chloride waste-water is 5~
20mg/L。
5. processing method according to claim 1, which is characterized in that the concentration of ammonium chloride is in the ammonium chloride waste-water
1~8mol/L.
6. processing method according to claim 1, which is characterized in that ammonium chloride waste-water by the flow velocity of resin column be 1~
7m3/h。
7. processing method according to claim 1, which is characterized in that the specific surface area of the cross-linked polymer is not less than
900m2/g。
8. processing method according to claim 1, which is characterized in that the wet apparent density of the cross-linked polymer is 0.50
~0.90g/ml, and wet true density is 1.00~1.50g/ml.
9. processing method according to claim 1, which is characterized in that the cross-linked polymer is resin particle, and grain
Diameter is that the resin particle content within the scope of 0.2~2.00mm is 85%~100%.
10. described in any item processing methods according to claim 1~9, which is characterized in that the diameter and height of the resin column
The ratio between degree is 1:3~20.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106746114A (en) * | 2016-12-18 | 2017-05-31 | 南通江山农药化工股份有限公司 | The production method of amide-type by-product industrial ammonium chloride |
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2019
- 2019-08-13 CN CN201910745499.1A patent/CN110422903A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106746114A (en) * | 2016-12-18 | 2017-05-31 | 南通江山农药化工股份有限公司 | The production method of amide-type by-product industrial ammonium chloride |
| CN107043192A (en) * | 2017-05-05 | 2017-08-15 | 北京中科康仑环境科技研究院有限公司 | A kind of integrated conduct method of Rare-earth Ammonia soap raffinate |
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| 中国材料研究学会: "《中国战略性新兴产业 新材料 环境工程材料》", 30 November 2018, 中国铁道出版社 * |
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Application publication date: 20191108 |