CN1072730C - Recovery process of waste cobalt-molybdenum catalyst - Google Patents
Recovery process of waste cobalt-molybdenum catalyst Download PDFInfo
- Publication number
- CN1072730C CN1072730C CN98126373A CN98126373A CN1072730C CN 1072730 C CN1072730 C CN 1072730C CN 98126373 A CN98126373 A CN 98126373A CN 98126373 A CN98126373 A CN 98126373A CN 1072730 C CN1072730 C CN 1072730C
- Authority
- CN
- China
- Prior art keywords
- cobalt
- filtrate
- ammonia
- filter
- add
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000003054 catalyst Substances 0.000 title claims abstract description 31
- WHDPTDWLEKQKKX-UHFFFAOYSA-N cobalt molybdenum Chemical compound [Co].[Co].[Mo] WHDPTDWLEKQKKX-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 238000011084 recovery Methods 0.000 title claims description 20
- 239000002699 waste material Substances 0.000 title claims description 13
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 22
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000010941 cobalt Substances 0.000 claims abstract description 17
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 17
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 11
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000004411 aluminium Substances 0.000 claims abstract description 7
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 7
- 150000001875 compounds Chemical class 0.000 claims abstract description 5
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 4
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims abstract description 4
- 235000011130 ammonium sulphate Nutrition 0.000 claims abstract description 4
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 4
- 229910052742 iron Inorganic materials 0.000 claims abstract description 3
- 239000000706 filtrate Substances 0.000 claims description 18
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 9
- 238000007598 dipping method Methods 0.000 claims description 8
- 239000012065 filter cake Substances 0.000 claims description 5
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 4
- 230000008030 elimination Effects 0.000 claims description 4
- 238000003379 elimination reaction Methods 0.000 claims description 4
- 238000002203 pretreatment Methods 0.000 claims description 4
- 229910001777 tschermigite Inorganic materials 0.000 claims description 4
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 claims description 3
- 229940010552 ammonium molybdate Drugs 0.000 claims description 3
- 235000018660 ammonium molybdate Nutrition 0.000 claims description 3
- 239000011609 ammonium molybdate Substances 0.000 claims description 3
- WRWZNPYXEXPBAY-UHFFFAOYSA-N azane cobalt Chemical compound N.[Co] WRWZNPYXEXPBAY-UHFFFAOYSA-N 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000006424 Flood reaction Methods 0.000 claims description 2
- 235000019270 ammonium chloride Nutrition 0.000 claims description 2
- UNTBPXHCXVWYOI-UHFFFAOYSA-O azanium;oxido(dioxo)vanadium Chemical compound [NH4+].[O-][V](=O)=O UNTBPXHCXVWYOI-UHFFFAOYSA-O 0.000 claims description 2
- 238000009835 boiling Methods 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 238000001556 precipitation Methods 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 4
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 abstract description 3
- 238000000605 extraction Methods 0.000 abstract description 2
- 239000012535 impurity Substances 0.000 abstract description 2
- 235000011124 aluminium ammonium sulphate Nutrition 0.000 abstract 1
- LCQXXBOSCBRNNT-UHFFFAOYSA-K ammonium aluminium sulfate Chemical compound [NH4+].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O LCQXXBOSCBRNNT-UHFFFAOYSA-K 0.000 abstract 1
- 239000011701 zinc Substances 0.000 abstract 1
- 229910052725 zinc Inorganic materials 0.000 abstract 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 7
- 229910052750 molybdenum Inorganic materials 0.000 description 7
- 239000011733 molybdenum Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical group Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 150000001868 cobalt Chemical class 0.000 description 2
- -1 lipid monocarboxylic acid Chemical class 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000220317 Rosa Species 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229940037003 alum Drugs 0.000 description 1
- BLJNPOIVYYWHMA-UHFFFAOYSA-N alumane;cobalt Chemical compound [AlH3].[Co] BLJNPOIVYYWHMA-UHFFFAOYSA-N 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- GVPFVAHMJGGAJG-UHFFFAOYSA-L cobalt dichloride Chemical compound [Cl-].[Cl-].[Co+2] GVPFVAHMJGGAJG-UHFFFAOYSA-L 0.000 description 1
- 229910000428 cobalt oxide Inorganic materials 0.000 description 1
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Catalysts (AREA)
Abstract
The present invention relates to a method for recovering spent cobalt-molybdenum catalysts. Solution soaked in ammonia for a plurality of times in a circulating time firstly reacts with zinc to replace cobalt in complex compounds, and then, nitric acid is added to recover MoO3. After being soaked in ammonia, filter residues are dissolved by sulfuric acid, and ammonium sulfate is added to separate ammonium alum to remove most of aluminium. After iron and other impurities in a small quantity of obtained concentrated solution are removed, excess ammonia is added to make cobalt converted into complex compounds, and zinc powder is utilized to replace cobalt. The recovering method doesn't need extraction and other completed process steps and has the advantages of simplicity and practicability.
Description
The present invention relates to a kind of recovery method of spent catalyst, relate in particular to a kind of recovery process of waste cobalt-molybdenum catalyst.
Along with industrial expansion, the cobalt-molybdenum catalyst consumption is increasing.Therefore, from spent catalyst, reclaim precious metal, not only can make rational use of resources, reduce the pollution of waste, and economic benefit is considerable environment.
Co-Mo/r-Al
2O
3Spent catalyst is owing to contain carrier A l
2O
3Higher, separate very difficultly, cobalt, molybdenum content are not high yet, often it is not separated, and the reductibility of utilizing molybdenum add as raw material when the smelting alloy, Al
2O
3Then discharge, but cobalt fails to reclaim separately with the form of slag.
At present, some Overseas Companys are in the recovery operation of carrying out spent catalyst, and for example her Miyazaki of gesture chemical company factory of Japan adopts ion-exchange to combine with solution extraction, isolates aluminium earlier, reclaims molybdenum with chloride form then, reclaims cobalt chloride with chloride form.
United States Patent (USP) has proposed a kind of processing method that reclaims cobalt salt catalyst from the low lipid monocarboxylic acid of 2～4 carbon atoms for No. 3525762.United States Patent (USP) proposes a kind of processing method that reclaims cobalt salt catalyst from the oxidation residue mother liquor for No. 4162991.No. 4145397, United States Patent (USP), proposition reclaim the technology of multiple useful metal from spent catalyst.This technology is leached petroleum sweetening sintering spent catalyst with hot alkali water, separates respectively from lixivium and capture contains most molybdenum and alum, makes it to separate with the aluminium component.The above method, its technology are all very complicated.
According to the data report, mostly domestic is to reclaim molybdenum from spent catalyst, further reclaims cobalt etc., does not then have concrete report.
The object of the present invention is to provide a kind of recovery process of waste cobalt-molybdenum catalyst, and this method such as need not extract at the full recovery that loaded down with trivial details operation just can realize cobalt, aluminium, molybdenum.
Above-mentioned purpose of the present invention is reached by following concrete technical scheme.
Recovery process of waste cobalt-molybdenum catalyst of the present invention comprises the steps:
1. the waste cobalt-molybdenum catalyst that exists with sulphided form is carried out the pre-treatment of oxidizing roasting and crushing screening;
2. the described spent catalyst after the molten dipping pre-treatment of ammonia;
3. filter the material behind the molten dipping of ammonia, in filtrate, add zinc powder, displace the cobalt in the complex compound;
4. add nitric acid in the filtrate after displacing cobalt, transfer PH=1-2, separate out MoO
3
5. to MoO
3The middle ammoniacal liquor that adds obtains ammonium molybdate;
6. 3. filter the gradation adding vitriol oil in the filter cake that obtains, dissolving filter cake under boiling in step;
7. the elimination insolubles adds ammonium sulfate in filtrate;
8. the filtrate of elimination step in 7. obtains tschermigite.
In order further to reclaim cobalt, recovery process of waste cobalt-molybdenum catalyst of the present invention also comprises the steps: to add ammoniacal liquor in removing the filtrate of tschermigite, remove by filter impurity such as iron, aluminium, and add excessive ammonia and form cobalt-ammonia complex, add zinc dust precipitation again and go out cobalt in the complex compound.
If contain vanadium in the spent catalyst, cobalt-aluminium of the present invention is the spent catalyst recovery method, can step increase 3. and 4. displace cobalt after, filtrate is concentrated, add ammonium chloride then, generate ammonium vanadate, obtain V through roasting
2O
5Step.
Recovery process of waste cobalt-molybdenum catalyst of the present invention, wherein said roasting is carried out in converter, and the rotating speed of converter is 0.2 rev/min, and maturing temperature is 550-600 ℃, and roasting time is 2-4 hour; The molten dipping of described ammonia is to use 4N ammoniacal liquor, NH
4The weight ratio of OH and spent catalyst is 4: 1, stirs under 50-60 ℃ of temperature, floods three circulation dippings 2-2.5 hour; Described being filtered into through 200 purpose filter cloth or filter paper filterings.
Recovery process of waste cobalt-molybdenum catalyst of the present invention, its advantage is:
1. adopt Chemicals cheap and easy to get, just can successfully from cobalt-molybdenum-aluminium spent catalyst, reclaim entirely, and reclaim the product purity height, pollute little through described step;
2. method is simple, and technical process is short, and is therefore with low cost;
3. rate of recovery height, molybdenum 〉=90% wherein, cobalt 〉=90%, aluminium＞85%;
4. based on above-mentioned 3 points, present method has the economic benefit that shows work.
Describe a specific embodiment of recovery process of waste cobalt-molybdenum catalyst of the present invention below in detail:
1. get B
301The type catalyzer is through 600 ℃ of oxidizing roastings 4 hours, Cheng Lanse, and through pulverizing 120 mesh sieves, wherein cobalt oxide content is 1.45% then, molybdic oxide content is 9.2%;
2. take by weighing material 500 grams of above-mentioned crushing screening, add 4N ammoniacal liquor 2000 grams, in the beaker of 3000ml, under 50-60 ℃ of temperature, stir, leached 2-2.5 hour, filter then, in filtrate, add zinc powder to filtrate again and become little yellow, filter with qualitative filter paper, the filter thing gets cobalt powder 0.85 gram in 80 ℃ of oven dry; Remaining filtrate is transferred PH=1 with nitric acid, obtains MoO
34 0.2 grams, yield reaches 87.4%, closes ammonium molybdate 54.7 grams;
3. the filter cake of ammonia after molten is with 98% sulfuric acid dissolution, and temperature reaches 120～130 ℃, and it is 1.3-1.4 that water transfers to proportion, add ammonium sulfate 670 grams at 90-100 ℃, stirred 1 minute after 30 minutes, be chilled to room temperature, there are a large amount of water white tschermigites to separate out, filter and be weighed as 4268 grams;
4. the rose vitriol concentrated solution that above-mentioned filtrate is 450 ml, the ammoniacal liquor with 18% is transferred PH=5.5-6, and Al (OH) is arranged
3And Fe (OH)
2Be precipitated out, remove by filter with analytical paper;
5. add 18% ammoniacal liquor in above-mentioned filtrate, until forming red cobalt-ammonia complex, at room temperature add zinc powder to redness and disappear, filter, and 80 ℃ of oven dry down, get cobalt powder 4.3 grams, the cobalt total recovery reaches 90.35%.
Recovery method of the present invention, reclaiming Co-Mo-Al spent catalyst schema entirely from wet method shown in Figure 1 can come into plain view.
Claims (4)
1, a kind of recovery method of waste cobalt-molybdenum catalyst is characterized in that this method comprises the steps:
1. the waste cobalt-molybdenum catalyst that exists with sulphided form is carried out the pre-treatment of oxidizing roasting and crushing screening;
2. the described spent catalyst after the molten dipping pre-treatment of ammonia;
3. filter the material behind the molten dipping of ammonia, in filtrate, add zinc powder, displace the cobalt in the complex compound;
4. add nitric acid in the filtrate after displacing cobalt, transfer PH=1-2, separate out MoO
3
5. to MoO
3The middle ammoniacal liquor that adds obtains ammonium molybdate;
6. 3. filter the gradation adding vitriol oil in the filter cake that obtains, dissolving filter cake under boiling in step;
7. the elimination insolubles adds ammonium sulfate in filtrate;
8. the filtrate of elimination step in 7. obtains tschermigite.
2, recovery method according to claim 1 is characterized in that described method also comprises the steps: to add ammoniacal liquor in obtaining the filtrate of tschermigite, removes by filter iron and aluminium, obtains cobalt-ammonia complex, adds zinc dust precipitation again and go out cobalt powder in filtrate.
3, recovery method according to claim 1, it is characterized in that step increase 3. and 4. displace cobalt after, filtrate is concentrated, add ammonium chloride then, generate ammonium vanadate, obtain the step of V2O5 through roasting.
4, according to claim 1,2 or 3 described recovery methods, it is characterized in that: described roasting is carried out in converter, and the rotating speed of converter is 0.2 rev/min, and maturing temperature is 550-600 ℃, and roasting time is 2-4 hour; The molten dipping of described ammonia is to use 4N ammoniacal liquor, NH
4The weight ratio of OH and spent catalyst is 4: 1, stirs under 50-60 ℃ of temperature, floods three circulation dippings 2-2.5 hour; Described being filtered into through 120-200 purpose filter cloth or filter paper filtering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98126373A CN1072730C (en) | 1998-12-30 | 1998-12-30 | Recovery process of waste cobalt-molybdenum catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98126373A CN1072730C (en) | 1998-12-30 | 1998-12-30 | Recovery process of waste cobalt-molybdenum catalyst |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1258754A CN1258754A (en) | 2000-07-05 |
| CN1072730C true CN1072730C (en) | 2001-10-10 |
Family
ID=5229625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98126373A Expired - Fee Related CN1072730C (en) | 1998-12-30 | 1998-12-30 | Recovery process of waste cobalt-molybdenum catalyst |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1072730C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1921941B (en) * | 2004-02-24 | 2013-01-16 | 三菱丽阳株式会社 | Method for recovering molybdenum and method for preparing catalyst |
| CN100540474C (en) * | 2007-05-15 | 2009-09-16 | 中国铝业股份有限公司 | From sodium aluminate solution, extract the method for molybdenum |
| CN101724758B (en) * | 2008-10-29 | 2011-04-06 | 中国石油化工股份有限公司抚顺石油化工研究院 | Method for recycling molybdenum of molybdenum-contained waste catalyst |
| CN103849772A (en) * | 2012-11-28 | 2014-06-11 | 大连东泰产业废弃物处理有限公司 | Method for recovering metal cobalt by N,N'-1,2-ethanediylbis-1-aspartic acid |
| CN109652649B (en) * | 2017-10-10 | 2021-08-03 | 中国石油化工股份有限公司 | Method for improving recovery rate of cobalt and molybdenum of waste catalyst |
| CN108585045B (en) * | 2018-05-25 | 2020-05-19 | 万华化学集团股份有限公司 | Recovery method of homogeneous molybdenum complex catalyst for propylene epoxidation |
| CN111298846A (en) * | 2019-11-11 | 2020-06-19 | 大连瑞克科技有限公司 | Method for recovering waste iron-molybdenum catalyst for preparing formaldehyde by oxidizing methanol |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1128680A (en) * | 1995-02-09 | 1996-08-14 | 中国石化齐鲁石油化工公司 | Regeneration method of carbon monoxide sulfur-tolerant shift catalyst |
-
1998
- 1998-12-30 CN CN98126373A patent/CN1072730C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1128680A (en) * | 1995-02-09 | 1996-08-14 | 中国石化齐鲁石油化工公司 | Regeneration method of carbon monoxide sulfur-tolerant shift catalyst |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1258754A (en) | 2000-07-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104831075B (en) | A kind of vanadium of useless vanadium molybdenum system SCR catalyst, molybdenum are separated and method of purification | |
| CN101457296B (en) | A method for recovering metal oxides from waste aluminum-based vanadium-molybdenum-nickel catalysts | |
| CN108467939A (en) | A method of recycling nickel, molybdenum from useless nickel molybdenum catalyst | |
| CN114314661B (en) | Method for producing high-purity ammonium metavanadate by deep cobalt removal of vanadium raw material | |
| CN103526057A (en) | Method of comprehensive recovery of rare precious metals in rare earth smelting slag | |
| CN100396804C (en) | Technology for extracting Gallium metal from lead-zine tail ore slug smelting by extracting-electrolytic method | |
| CN1072730C (en) | Recovery process of waste cobalt-molybdenum catalyst | |
| CN118531215A (en) | Metal recovery method for waste catalyst containing aluminum, nickel, molybdenum, vanadium and iron | |
| CN112342383B (en) | Separation and recovery method of nickel, cobalt, manganese and lithium in ternary waste | |
| Zhang et al. | Recovery of manganese from manganese oxide ores in the EDTA solution | |
| CN112408459A (en) | A kind of recycling treatment method of hot dip galvanizing pickling waste liquid | |
| CN115806317B (en) | Method for preparing ammonium paratungstate by using tungsten-containing grinding waste | |
| CN101041453A (en) | Method for preparing cerium dioxide by iron-selection refuse ore | |
| CN119461265A (en) | A method for preparing high-purity tellurium dioxide powder by refining tellurium slag | |
| CN117660762A (en) | A method for selectively recovering molybdenum and nickel from waste nickel-molybdenum catalyst | |
| CN115109931A (en) | Method for recovering multiple metals from tungsten-molybdenum waste residue | |
| CN1084895A (en) | Process for treating low-grade copper slag or copper oxide ore by ammonia leaching precipitation method | |
| CN1480541A (en) | A method for extracting cobalt from industrial waste residue | |
| CN113774219B (en) | Method for recycling waste cobalt-molybdenum hydrogenation catalyst | |
| CN113293314A (en) | Method for leaching and separating bismuth from blast furnace gas ash or/and mud | |
| CN113249579A (en) | Resource recovery method for electroplating sludge with high copper and nickel content | |
| CN1116423C (en) | Extraction method for ore containing as and others difficult to process | |
| CN1135533A (en) | Method for recovering cobalt | |
| CN115704065B (en) | Method for separating and recovering uranium and molybdenum from stripping three-phase floccules | |
| CN111302408A (en) | Method for recycling nickel, cobalt and manganese from scrapped lithium ion battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |