CN1339611A - Method for recovering silver-platinum from platinum containing silver iodide slag - Google Patents
Method for recovering silver-platinum from platinum containing silver iodide slag Download PDFInfo
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- CN1339611A CN1339611A CN00122340A CN00122340A CN1339611A CN 1339611 A CN1339611 A CN 1339611A CN 00122340 A CN00122340 A CN 00122340A CN 00122340 A CN00122340 A CN 00122340A CN 1339611 A CN1339611 A CN 1339611A
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- platinum
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- sulfuric acid
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- 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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Abstract
The silver and platinum recovering process from waste liquid containing silver iodide from platinum type anticancer medicine production includes: reducing of hydrazine hydrate, dissolution with concentrated sulfuric acid to separate silver and platinum, and refining silver and platinum through traditional process. The process of the present invention is easy and complete in separating silver and platinum, and has silver and platinum recovering rate as high as 98.5% and 99% separately. The method of the present invention may be used in treating various waste material containing silver and platinum.
Description
The present invention relates to contain the recovery of precious metal waste material, reclaim silver-colored platinum in the platiniferous silver iodide slag that particularly from platinum-containing anticancer drug, produces.
Along with science and technology development, the Application Areas of platinum metals and gold and silver constantly enlarges, and consumption increases day by day, and the status that the regeneration of waste material is reclaimed aborning is more and more important.Modern materials recycling reclaims and has become the important component part that precious metal is produced, and secondary metals have become the important source of precious metal.In platinum-containing anticancer drug was produced, final product also had platiniferous Silver iodide waste residue except that product.The silver-colored platinum that effectively reclaims in this waste residue helps to enlarge the secondary metals utilization ratio and reduces production costs.A kind of method with the platinum in the comprehensive recovery of the hydrazine hydrate reduction nitric acid branch silver platiniferous silver iodide slag, silver, iodine reported in " the comprehensive recovery of platiniferous silver iodide slag in the platinum-containing anticancer drug production " literary composition of " precious metal " (1997 supplementary issue) publication.The technical process that this method reclaims silver-colored platinum is: the silver-colored platinum slag that will be obtained by hydrazine hydrate reduction platiniferous silver iodide slag under alkaline condition is handled the recovery that realizes silver-colored platinum with nitric acid dissolve separation of Silver platinum through follow-up traditional technology.Realized the rate of recovery that silver-colored platinum is higher with this method.
But when dividing silver with nitric acid, because platinum fine size in the silver-colored platinum powder has very high activity, though strict control concentration of nitric acid and temperature of reaction, still have part platinum to enter in the silver nitrate solution, silver platinum disperses mutually, and separation difficulty causes the platinum rate of recovery low, during with the nitric acid dissolve silver-platinum alloy, silver platinum can enter solution simultaneously, and with the heavy silver of sodium-chlor, part platinum is with Ag
2PtCl
6Form and AgCl co-precipitation, AgCl can adsorb a large amount of platinum simultaneously, and platinum is dispersed in the silver, and the platinum rate of recovery is low.
The object of the present invention is to provide a kind of from based on the effective method of Separation and Recovery silver platinum in the waste material of silver-colored platinum, the platiniferous silver iodide slag that particularly from platinum-containing anticancer drug is produced, produces.
Silver-colored platinum of the present invention reclaims technology:
1, at first adopt traditional hydrazine hydrate reduction method that argentiferous platinum waste material is reduced in alkaline environment;
2, the silver-colored platinum slag that reduction the is obtained industrial vitriol oil heating for dissolving separation of Silver platinum of concentration 98%, Heating temperature is 140～180 ℃, and optimum temps is 150～170 ℃, and be 1～2 hour heat-up time, and liquid-solid ratio is 6: 1.
3, adopt platinum slag aqua regia dissolution after traditional technology will be divided silver, ammonium chloride sink platinum, calcine spongy platinum: the argentiferous mother liquor behind the branch silver precipitates with sodium-chlor, and formaldehyde reduces and obtains silver powder under the alkaline condition.
Because the present invention adopts concentrated sulfuric acid dissolution silver with separation of Silver platinum, silver-colored platinum is separated easily, platinum does not enter solution, avoided phase mutual diffusion and silver chloride absorption platinum between silver-colored platinum that the molten silver of nitric acid brings, thereby the rate of recovery of silver-colored platinum reach respectively silver 98.5% or more with platinum 99%, spongy platinum that obtains and Silver Nitrate can return in the production of platinum-containing anticancer drug, so also can reduce the cost of drug manufacture, saved raw material, limited platinum resource is utilized to a greater extent.
Method of the present invention also can be used for handling various silver-platinum alloy waste materials.
Embodiment:
1, with the platiniferous silver iodide slag hydrazine hydrate reduction that forms in the platinum-containing anticancer drug production, get 100g silver platinum slag after the drying, with 98% industrial vitriol oil 600ml in 160 ℃ of down molten silver 1 hour with separation of Silver platinum, silver leaching rate is 98.l%, divides silver back platinum slag with rare chloroazotic acid (HCl: HNO
3=5: 1) dissolving, concentrate and catch up with nitre, filter a NH
4Cl sinks platinum, calcines to such an extent that purity is 99.95% spongy platinum, and the platinum rate of recovery is 99%.Divide the mother liquor behind the silver to merge the heavy silver with industrial NaCl with wash water, AgCl adds aqueous suspension after washing, transfer PH as for 11 with 20%NaoH solution, is heated to 80 ℃, and adding formaldehyde reduces to such an extent that purity is 99.9% silver powder, and silver raising recovery rate is 98%.
2, with the platiniferous silver iodide slag hydrazine hydrate reduction that forms in the platinum-containing anticancer drug production, take by weighing 7530g after the drying, wherein contain Pt6.66%, Ag93.26%, industrial vitriol oil 45.0L with 98% dissolves silver-colored 1.5 hours down with separation of Silver platinum in 180 ℃, the vitriol oil (V): silver-colored platinum slag (W)=6: 1, silver leaching rate are 99.41%.Divide silver back platinum slag with rare chloroazotic acid (HCl: HNO
3=5: 1) dissolving concentrates and catches up with nitre, filtration, a NH
4Cl sinks platinum, calcines to such an extent that purity is 99.95% spongy platinum 499.59g, and the platinum rate of recovery is 99.62%.Mother liquor behind minute silver is merged the heavy silver with industrial NaCl with wash water, and AgCl adds aqueous suspension after washing, transfer PH as for 11 with 20%NaOH solution, is heated to 80 ℃, and adding formaldehyde reduces to such an extent that purity is 99.9% silver powder 6917.14, silver raising recovery rate 98.5%.
3, with the platiniferous silver iodide slag hydrazine hydrate reduction that forms in the platinum-containing anticancer drug production, take by weighing 11020g after the drying, wherein contain Pt9.14%, Ag90.64%, the industrial vitriol oil with 98% melts silver-colored 2 hours down with separation of Silver platinum in 180 ℃, the vitriol oil (V): silver-colored platinum slag (W)=6: 1, silver leaching rate are 99.37%.Divide silver back platinum slag with rare chloroazotic acid (HCl: HNO
3=5: 1) dissolving concentrates and catches up with nitre, filtration, a NH
4Cl sinks platinum, calcine to such an extent that purity is 99.95% spongy platinum 1002.5g, the platinum rate of recovery is that 99.53%. will divide the mother liquor behind the silver to merge with industrial NaCl heavy silver-colored with wash water, AgCl adds aqueous suspension after washing, transfer PH as for 11 with 20%NaOH solution, be heated to 80 ℃, add formaldehyde and reduce to such an extent that purity is 99.9% silver powder 9836.7g, silver raising recovery rate 98.48%.
4, with silver-platinum alloy waste material 4350g, wherein contain Pt0.97%, Ag97.3%, the industrial dense sulphur with 98% dissolve silver-colored 2 hours with separation of Silver platinum under 170 ℃, and (v): silver-platinum alloy (W)=6: 1, silver leaching rate are 99.54% to the vitriol oil.Divide silver back slag with rare chloroazotic acid (HCl: HNO
3-5: 1) dissolving concentrates and catches up with nitre, filtration, a NH
4Cl sinks platinum, calcines to such an extent that purity is 99.95% spongy platinum 42.02g, and the platinum rate of recovery is 99.59%.Mother liquor behind minute silver is merged the heavy silver with industrial NaCl with wash water, and AgCl adds aqueous suspension after washing, transfer PH as for 11 with 20%NaOH solution, is heated to 80 ℃, and adding formaldehyde reduces to such an extent that purity is 99.9% silver powder 4180.91g, silver raising recovery rate 98.78%.
Claims (2)
1, a kind of method that from the platiniferous Silver iodide waste material that platinum-containing anticancer drug production forms, reclaims silver-colored platinum, comprise hydrazine hydrate reduction, acid separated and dissolved silver platinum, the traditional technology platinum that refines silver, it is characterized in that adopting sulfuric acid dissolution separation of Silver platinum, sulfuric acid is the industrial vitriol oil of concentration 98%, with the liquid-solid ratio of silver-colored platinum slag be 6: 1, sulfuric acid heating for dissolving temperature is 140～180 ℃, and be 1～2 hour heat-up time.
2, the method for the silver-colored platinum of a kind of recovery as claimed in claim 1 is characterized in that sulfuric acid heating for dissolving temperature the best is 150～170 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00122340A CN1339611A (en) | 2000-08-25 | 2000-08-25 | Method for recovering silver-platinum from platinum containing silver iodide slag |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00122340A CN1339611A (en) | 2000-08-25 | 2000-08-25 | Method for recovering silver-platinum from platinum containing silver iodide slag |
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| CN1339611A true CN1339611A (en) | 2002-03-13 |
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| CN00122340A Pending CN1339611A (en) | 2000-08-25 | 2000-08-25 | Method for recovering silver-platinum from platinum containing silver iodide slag |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100582261C (en) * | 2008-04-08 | 2010-01-20 | 昆明贵研药业有限公司 | Method and device for reclaiming platinum-silver-iodine form platinum-containing silver iodide slag |
| CN104726899A (en) * | 2014-12-30 | 2015-06-24 | 永兴贵研资源有限公司 | Method for recycling silver and platinum from platinum-containing silver iodide |
| CN112458307A (en) * | 2020-11-16 | 2021-03-09 | 无锡英特派金属制品有限公司 | Separation method of platinum-silver alloy |
-
2000
- 2000-08-25 CN CN00122340A patent/CN1339611A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100582261C (en) * | 2008-04-08 | 2010-01-20 | 昆明贵研药业有限公司 | Method and device for reclaiming platinum-silver-iodine form platinum-containing silver iodide slag |
| CN104726899A (en) * | 2014-12-30 | 2015-06-24 | 永兴贵研资源有限公司 | Method for recycling silver and platinum from platinum-containing silver iodide |
| CN112458307A (en) * | 2020-11-16 | 2021-03-09 | 无锡英特派金属制品有限公司 | Separation method of platinum-silver alloy |
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