CN111057864A - Process for recovering silver from waste liquid of photosensitive material - Google Patents
Process for recovering silver from waste liquid of photosensitive material Download PDFInfo
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- CN111057864A CN111057864A CN201911355779.8A CN201911355779A CN111057864A CN 111057864 A CN111057864 A CN 111057864A CN 201911355779 A CN201911355779 A CN 201911355779A CN 111057864 A CN111057864 A CN 111057864A
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- Prior art keywords
- silver
- waste liquid
- reaction kettle
- photosensitive material
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- 229910052709 silver Inorganic materials 0.000 title claims abstract description 63
- 239000004332 silver Substances 0.000 title claims abstract description 63
- 239000002699 waste material Substances 0.000 title claims abstract description 50
- 239000007788 liquid Substances 0.000 title claims abstract description 42
- 239000000463 material Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 16
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 64
- 238000006243 chemical reaction Methods 0.000 claims abstract description 48
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims abstract description 48
- 229910021607 Silver chloride Inorganic materials 0.000 claims abstract description 30
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 claims abstract description 30
- 229910001961 silver nitrate Inorganic materials 0.000 claims abstract description 24
- 238000004065 wastewater treatment Methods 0.000 claims abstract description 19
- 229910052946 acanthite Inorganic materials 0.000 claims abstract description 17
- 239000000706 filtrate Substances 0.000 claims abstract description 17
- 238000001914 filtration Methods 0.000 claims abstract description 16
- XUARKZBEFFVFRG-UHFFFAOYSA-N silver sulfide Chemical compound [S-2].[Ag+].[Ag+] XUARKZBEFFVFRG-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229940056910 silver sulfide Drugs 0.000 claims abstract description 15
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 12
- 239000000126 substance Substances 0.000 claims abstract description 12
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 10
- 238000001556 precipitation Methods 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 7
- NWZSZGALRFJKBT-KNIFDHDWSA-N (2s)-2,6-diaminohexanoic acid;(2s)-2-hydroxybutanedioic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O.NCCCC[C@H](N)C(O)=O NWZSZGALRFJKBT-KNIFDHDWSA-N 0.000 claims abstract description 6
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 6
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 6
- IKDUDTNKRLTJSI-UHFFFAOYSA-N hydrazine monohydrate Substances O.NN IKDUDTNKRLTJSI-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000011780 sodium chloride Substances 0.000 claims abstract description 6
- 238000005086 pumping Methods 0.000 claims abstract description 4
- 238000005266 casting Methods 0.000 claims abstract description 3
- 238000001035 drying Methods 0.000 claims abstract description 3
- 238000004064 recycling Methods 0.000 claims abstract description 3
- 239000002244 precipitate Substances 0.000 claims description 9
- 150000003839 salts Chemical class 0.000 claims description 5
- 229910052979 sodium sulfide Inorganic materials 0.000 claims description 5
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 3
- 229910001385 heavy metal Inorganic materials 0.000 claims description 3
- 238000010907 mechanical stirring Methods 0.000 claims description 3
- OCWNMDUAUUAHSJ-UHFFFAOYSA-N silver;sulfanylidenesilver Chemical compound [Ag].[Ag]=S OCWNMDUAUUAHSJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 230000008021 deposition Effects 0.000 claims description 2
- 238000011084 recovery Methods 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- 238000005660 chlorination reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006396 nitration reaction Methods 0.000 description 2
- 239000010815 organic waste Substances 0.000 description 2
- FSJWWSXPIWGYKC-UHFFFAOYSA-M silver;silver;sulfanide Chemical compound [SH-].[Ag].[Ag+] FSJWWSXPIWGYKC-UHFFFAOYSA-M 0.000 description 2
- 238000005987 sulfurization reaction Methods 0.000 description 2
- ZVNPWFOVUDMGRP-UHFFFAOYSA-N 4-methylaminophenol sulfate Chemical compound OS(O)(=O)=O.CNC1=CC=C(O)C=C1.CNC1=CC=C(O)C=C1 ZVNPWFOVUDMGRP-UHFFFAOYSA-N 0.000 description 1
- 229910017611 Ag(NH3)2 Inorganic materials 0.000 description 1
- FOIXSVOLVBLSDH-UHFFFAOYSA-N Silver ion Chemical compound [Ag+] FOIXSVOLVBLSDH-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009924 canning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 239000013072 incoming material Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000010808 liquid waste Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/04—Obtaining noble metals by wet processes
- C22B11/042—Recovery of noble metals from waste materials
- C22B11/046—Recovery of noble metals from waste materials from manufactured products, e.g. from printed circuit boards, from photographic films, paper or baths
-
- 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
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/62—Heavy metal compounds
-
- 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
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/40—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture or use of photosensitive materials
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Removal Of Specific Substances (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention discloses a process for recovering silver from a photosensitive material waste liquid, which comprises the following steps: filtering the photosensitive material waste liquid and storing the filtered photosensitive material waste liquid in a raw material storage tank; silver sulfide reaction, pumping waste liquid in a raw material storage tank into a silver sulfide reaction kettle; sending the filtrate into a high-concentration organic wastewater treatment system, and sending silver sulfide into a silver nitrate reaction kettle; reacting silver nitrate, namely adding nitric acid into a silver nitrate reaction kettle, sending filtrate into a high-concentration organic wastewater treatment system, and sending silver nitrate into a silver chloride reaction kettle; carrying out silver chloride reaction, and adding a sodium chloride solution to carry out secondary silver precipitation; sending the filtrate into a high-concentration organic wastewater treatment system, and sending silver chloride into a silver forming reaction kettle; silver forming reaction, dissolving silver chloride in a silver forming reaction kettle in ammonia water, and reducing by using hydrazine hydrate to obtain simple substance silver filter mud; and (3) sending the filtrate to a high-concentration organic wastewater treatment system, and drying and ingot casting the elemental silver filter mud. The invention realizes the high-efficiency filtering of silver, effective recycling and treatment cost reduction.
Description
Technical Field
The invention belongs to the technical field of industrial wastewater treatment, and particularly relates to a process for recovering silver from a photosensitive material waste liquid.
Background
The photosensitive material waste is listed as the national hazardous waste name record HW16 photosensitive material waste (waste developing solution, waste fixing solution, photographic paper, waste film, positive and negative films), and mainly comprises liquid waste and solid waste. For liquid photosensitive material waste, the pollution is mainly from two aspects: one is the organic component in the waste liquid, such as hydroquinone or p-methylaminophenol sulfate in the waste developing solution, and the other is the silver ion in the waste liquid, such as the waste fixing solution, which causes great pollution hazard to soil, water and human health if the organic component is improperly disposed or randomly discharged. The existing photosensitive material waste liquid treatment process has high requirements on equipment and high treatment cost, and cannot effectively filter and purify silver.
Disclosure of Invention
The invention aims to solve the technical problems and provides a silver recovery process in the photosensitive material waste liquid, so that silver is efficiently filtered, the silver is effectively recycled, and the treatment cost is reduced. In order to achieve the purpose, the technical scheme of the invention is as follows:
the process for recovering silver from the photosensitive material waste liquid comprises the following steps:
s1, filtering the photosensitive material waste liquid and storing the filtered photosensitive material waste liquid in a raw material storage tank;
s2, carrying out silver sulfide reaction, pumping waste liquid in the raw material storage tank into a silver sulfide reaction kettle, and adding sodium sulfide into the photosensitive material waste liquid to carry out primary silver precipitation to obtain silver sulfide silver mud;
s3, removing substances which cannot form sulfide precipitates, filtering the substances by a silver sulfide filter tank, sending filtrate into a high-concentration organic wastewater treatment system, and sending silver sulfide to a silver nitrate reaction kettle;
s4, carrying out silver nitrate reaction, adding nitric acid into a silver nitrate reaction kettle to dissolve silver-containing solids into a solution, and filtering the solution by a silver nitrate filter tank to obtain silver nitrate;
s5, removing substances insoluble in nitric acid, filtering to obtain filter residues containing heavy metals, and recycling; sending the filtrate into a high-concentration organic wastewater treatment system, and sending silver nitrate into a silver chloride reaction kettle;
s6, carrying out silver chloride reaction, namely adding a sodium chloride solution into a silver chloride reaction kettle under the condition of mechanical stirring to carry out secondary silver precipitation to obtain silver chloride precipitate;
s7, removing salts which cannot form precipitates with chloride, filtering the salts by a silver chloride filter tank, sending filtrate into a high-concentration organic wastewater treatment system, and sending silver chloride into a silver forming reaction kettle;
s8, carrying out silver forming reaction, dissolving silver chloride in a silver forming reaction kettle in ammonia water, and then reducing with hydrazine hydrate to obtain simple substance silver filter mud;
s9, filtering by a silver forming filter tank, sending the filtrate to a high-concentration organic wastewater treatment system, and drying and ingot casting the elemental silver filter mud.
Specifically, in step S1, different transportation modes are selected to the discharge area according to the amount of the waste liquid.
Specifically, in step S2, 10% sodium sulfide is added to the photosensitive material waste liquid to perform primary silver deposition.
Specifically, in step S4, 25% nitric acid is added to the silver nitrate reaction kettle.
Specifically, in step S6, a 10% sodium chloride solution is added to the silver chloride reaction kettle to perform secondary silver precipitation.
Specifically, in step S8, silver chloride is dissolved in 25% ammonia water, and then reduced with 25% hydrazine hydrate.
Compared with the prior art, the silver recovery process in the photosensitive material waste liquid has the following beneficial effects:
the recovery process flow of silver in the photosensitive waste liquid adopts a 'sulfurization reaction, nitration reaction, chlorination reaction and silver forming reaction' treatment flow, the treated waste water is discharged to a high-concentration organic waste water treatment system for independent treatment, silver is efficiently filtered out, the silver is effectively recycled, and the treatment cost is reduced.
Drawings
FIG. 1 is a schematic flow process diagram of an embodiment of the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention are described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
Example (b):
referring to fig. 1, this embodiment is a process for recovering silver from a photosensitive material waste solution, and includes the following steps:
1) the photosensitive material waste liquid is conveyed to a comprehensive utilization workshop unloading area through a collecting vehicle, and the photosensitive material waste liquid is delivered to the unloading area in a barreled mode or in a canning mode according to the amount of the waste liquid, and the unloading area is provided with different unloading modes according to different incoming material modes after the photosensitive material waste liquid reaches the unloading area. A filter with a grating is arranged at the rear end of the discharge pit to intercept floating objects and large-particle pollutants of the photosensitive material waste liquid. The wastewater is collected and stored in a photosensitive material storage tank in a cofferdam of a workshop.
2) And (3) carrying out silver sulfide reaction, pumping the waste liquid in the raw material storage tank into a silver sulfide reaction kettle, and adding 10% of sodium sulfide into the photosensitive material waste liquid to carry out primary silver precipitation to obtain silver sulfide silver mud.
2Ag++S2-＝Ag2S↓
3) Removal of substances (Ag) which do not form sulphide precipitates2S is insoluble in water and soluble in concentrated sulfuric acid and nitric acid), after being filtered by a silver sulfide filter tank, the filtrate is sent to a high-concentration organic wastewater treatment system, and silver sulfide is sent to a silver nitrate reaction kettle;
4) and (3) carrying out silver nitrate reaction, namely adding 25% nitric acid into a silver nitrate reaction kettle to dissolve silver-containing solids into a solution, and filtering the solution by using a silver nitrate filter tank to obtain silver nitrate.
Ag2S↓+2H+＝2Ag++H2S
5) Removing substances insoluble in nitric acid, filtering to obtain filter residue, and recovering heavy metals; sending the filtrate into a high-concentration organic wastewater treatment system, and sending silver nitrate into a silver chloride reaction kettle;
6) and (3) carrying out silver chloride reaction, namely adding a 10% sodium chloride solution into a silver chloride reaction kettle under the condition of mechanical stirring to carry out secondary silver precipitation to obtain silver chloride precipitate.
Ag++Cl--＝AgCl↓
7) Removing salts which cannot form precipitates with chloride. After being filtered by a silver chloride filter tank, the filtrate is sent to a high-concentration organic wastewater treatment system, and silver chloride is sent to a silver forming reaction kettle;
8) and (3) carrying out silver forming reaction, dissolving silver chloride in 25% ammonia water in a silver forming reaction kettle, and then reducing with 25% hydrazine hydrate to obtain simple substance silver filter mud.
9) After being filtered by a silver forming filter tank, the filtrate is sent to a high-concentration organic wastewater treatment system, and the elemental silver filter mud is dried and cast ingot is treated.
4[Ag(NH3)2]++N2H4＝4Ag↓+N2↑+4NH3↑+4NH4 +
The components of the waste liquid of the photosensitive material are detected and shown in the table 1:
TABLE 1
After the treatment of the process, 3.752t/a silver powder is produced, and the water quality of the produced filtrate is shown in Table 2
TABLE 2
When the method is applied, the recovery process flow of silver in the photosensitive waste liquid adopts a 'sulfurization reaction, nitration reaction, chlorination reaction and silver forming reaction' treatment flow, the treated waste water is discharged to a high-concentration organic waste water treatment system for independent treatment, silver is efficiently filtered out, the silver is effectively recycled, and the treatment cost is reduced.
What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the invention.
Claims (6)
1. The process for recovering silver from the photosensitive material waste liquid is characterized by comprising the following steps of:
s1, filtering the photosensitive material waste liquid and storing the filtered photosensitive material waste liquid in a raw material storage tank;
s2, carrying out silver sulfide reaction, pumping waste liquid in the raw material storage tank into a silver sulfide reaction kettle, and adding sodium sulfide into the photosensitive material waste liquid to carry out primary silver precipitation to obtain silver sulfide silver mud;
s3, removing substances which cannot form sulfide precipitates, filtering the substances by a silver sulfide filter tank, sending filtrate into a high-concentration organic wastewater treatment system, and sending silver sulfide to a silver nitrate reaction kettle;
s4, carrying out silver nitrate reaction, adding nitric acid into a silver nitrate reaction kettle to dissolve silver-containing solids into a solution, and filtering the solution by a silver nitrate filter tank to obtain silver nitrate;
s5, removing substances insoluble in nitric acid, filtering to obtain filter residues containing heavy metals, and recycling; sending the filtrate into a high-concentration organic wastewater treatment system, and sending silver nitrate into a silver chloride reaction kettle;
s6, carrying out silver chloride reaction, namely adding a sodium chloride solution into a silver chloride reaction kettle under the condition of mechanical stirring to carry out secondary silver precipitation to obtain silver chloride precipitate;
s7, removing salts which cannot form precipitates with chloride, filtering the salts by a silver chloride filter tank, sending filtrate into a high-concentration organic wastewater treatment system, and sending silver chloride into a silver forming reaction kettle;
s8, carrying out silver forming reaction, dissolving silver chloride in a silver forming reaction kettle in ammonia water, and then reducing with hydrazine hydrate to obtain simple substance silver filter mud;
s9, filtering by a silver forming filter tank, sending the filtrate to a high-concentration organic wastewater treatment system, and drying and ingot casting the elemental silver filter mud.
2. The process for recovering silver from a waste liquid of a photosensitive material according to claim 1, wherein: in step S1, different transportation modes are selected to the discharge area according to the amount of waste liquid.
3. The process for recovering silver from a waste liquid of a photosensitive material according to claim 1, wherein: in step S2, 10% sodium sulfide is added to the photosensitive material waste liquid to perform primary silver deposition.
4. The process for recovering silver from a waste liquid of a photosensitive material according to claim 1, wherein: in step S4, 25% nitric acid is added to the silver nitrate reaction kettle.
5. The process for recovering silver from a waste liquid of a photosensitive material according to claim 1, wherein: in step S6, a 10% sodium chloride solution is added to the silver chloride reaction kettle to perform secondary silver precipitation.
6. The process for recovering silver from a waste liquid of a photosensitive material according to claim 1, wherein: in step S8, silver chloride is dissolved in 25% ammonia water and then reduced with 25% hydrazine hydrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911355779.8A CN111057864A (en) | 2019-12-25 | 2019-12-25 | Process for recovering silver from waste liquid of photosensitive material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911355779.8A CN111057864A (en) | 2019-12-25 | 2019-12-25 | Process for recovering silver from waste liquid of photosensitive material |
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| Publication Number | Publication Date |
|---|---|
| CN111057864A true CN111057864A (en) | 2020-04-24 |
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| CN201911355779.8A Pending CN111057864A (en) | 2019-12-25 | 2019-12-25 | Process for recovering silver from waste liquid of photosensitive material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114620879A (en) * | 2022-03-14 | 2022-06-14 | 苏州诺菲纳米科技有限公司 | Method for recycling waste liquid from silver nanowire production |
| CN115612856A (en) * | 2021-07-14 | 2023-01-17 | 谷育英 | Method for recovering metallic silver in silver-containing waste liquid |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4388109A (en) * | 1980-05-30 | 1983-06-14 | Sherritt Gordon Mines Limited | Process for the production of silver powder from silver chloride, sulphate or sulphide |
| CN1526839A (en) * | 2003-09-24 | 2004-09-08 | 苏州大学 | Method for recovering silver from silver-containing waste liquid |
| CN102071319A (en) * | 2010-12-16 | 2011-05-25 | 惠州市奥美特环境科技有限公司 | Method for preparing high-purity silver from silver-containing waste liquid |
| CN102616963A (en) * | 2011-07-08 | 2012-08-01 | 华东理工大学 | Photocatalytic treatment method of sensitive material waste |
| CN108190938A (en) * | 2017-12-22 | 2018-06-22 | 昆明理工大学 | It is a kind of to give up the method that silver paste prepares high purity silver nitrate from photovoltaic |
-
2019
- 2019-12-25 CN CN201911355779.8A patent/CN111057864A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4388109A (en) * | 1980-05-30 | 1983-06-14 | Sherritt Gordon Mines Limited | Process for the production of silver powder from silver chloride, sulphate or sulphide |
| CN1526839A (en) * | 2003-09-24 | 2004-09-08 | 苏州大学 | Method for recovering silver from silver-containing waste liquid |
| CN102071319A (en) * | 2010-12-16 | 2011-05-25 | 惠州市奥美特环境科技有限公司 | Method for preparing high-purity silver from silver-containing waste liquid |
| CN102616963A (en) * | 2011-07-08 | 2012-08-01 | 华东理工大学 | Photocatalytic treatment method of sensitive material waste |
| CN108190938A (en) * | 2017-12-22 | 2018-06-22 | 昆明理工大学 | It is a kind of to give up the method that silver paste prepares high purity silver nitrate from photovoltaic |
Non-Patent Citations (1)
| Title |
|---|
| 陈月莲: "从废底片及废液中回收银", 《贵金属》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115612856A (en) * | 2021-07-14 | 2023-01-17 | 谷育英 | Method for recovering metallic silver in silver-containing waste liquid |
| CN114620879A (en) * | 2022-03-14 | 2022-06-14 | 苏州诺菲纳米科技有限公司 | Method for recycling waste liquid from silver nanowire production |
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