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flipper
(Hive Bee) 04-21-02 11:12 No 299734 |
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hexachloroplatinic acid hexahydrate | Bookmark | |||||
Can I make this myself from Platinum and how do I do that. I have searched and searched but this IS my last hope to find something. ![]() You've gotta love me. |
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PrimoPyro (Change my Title Back!) 04-21-02 13:57 No 299764 |
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Aqua Regia | Bookmark | |||||
I'm pretty sure it's made by the action of aqua regia on platinum. Aqua regia is a very concentrated mixture of nitric acid and hydrogen chloride. Just how concentrated, I don't know. PrimoPyro Vivent Longtemps La Ruche! |
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Belial (Stranger) 04-21-02 14:04 No 299766 |
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3:1 | Bookmark | |||||
Aqua Regia = 3:1 of HNO3 & HCl |
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flipper (Hive Bee) 04-21-02 17:32 No 299811 |
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found it | Bookmark | |||||
I don't know if it's the sme but I think the procedure is described in this linkje Largescale methamphetamine production via catalytic hydrogenation (Zipped Word docs, 1MB) (../rhodium/archive/cookbook You've gotta love me. |
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terbium (Old P2P Cook) 04-21-02 18:49 No 299831 |
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Dissolving platinum | Bookmark | |||||
The Merck Index says that aqua regia is 18 ml (concentrated) nitric acid in 82 ml (concentrated) hydrochloric acid. Exact proportions are not critical. It is important that the acids be the concentrated acids - 70% HNO3 and 35% HCl. I do not mix all of the nitric with the hydrochloric at once. To dissolve platinum I place the platinum wire, strips etc. in a beaker on a hot plate, cover with hydrochloric acid, heat to near boiling and begin adding the nitric acid in small portions. When each portion of nitric acid is added brown fumes of nitric oxides will begin to be evolved (good ventilation from an exhaust fan is required!). When the brown fumes of nitric oxides stop coming from the beaker of hot acid then another small portion of nitric acid is added. If the platinum metal was in the form of wire or small clippings then it will fairly quickly dissolve under this treatment. If the process takes so long that the volume of liquid in the beaker diminishes before dissolution is completed then the volume is made up by the addition of more hydrochloric acid. When dissolution of the metal has been completed then the orange solution is boiled down to near dryness to drive off excess HCl. The solution can then be made up in volume with water and the platinum precipitated as ammonium chloroplatinate. Post 55334 (terbium: "Platinum is good too.", Chemicals & Equipment) |
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flipper (Hive Bee) 04-21-02 21:21 No 299856 |
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What SWIM wanna make with it | Bookmark | |||||
I wanna make that sulfided catalyst from patent 5498585. A) Preparing the catalyst precursor (Pt+H2O2)/C (without sulphidizing) To prepare a catalyst with 3% platinum load, 97 g of activated carbon (dry weight) were stirred into distilled water with a stirring speed of 300 rpm. 12 g of a 25% strength aqueous solution of hexachloroplatinic acid hexahydrate (corresponding to 3 g of Pt) and 3 ml of a 30% strength aqueous solution of H2O2, corresponding to 2 moles of H2O2 per mole of platinum, were added to this suspension. Then the suspension was heated to 80.degree. C. and sodium carbonate was added with continuous stirring, to precipitate barely soluble hydroxides. To reduce the precipitate, 1.8 ml of 37% strength formaldehyde solution was then added. The temperature of the suspension was also kept constant at 80.degree. C. during reduction. After reduction, the catalyst was filtered off on a nutsch filter and washed with DI water. B) Preparing the sulphidized catalyst according to the invention (Pt+H2O2+S)/C. To prepare a catalyst with a 3% platinum load according to the invention, a catalyst was first prepared in accordance with part A and then sulphidized with dimethyl sulphoxide in accordance with example 1 in DE-PS 21 50 220. The total sulphur content of the sulphidized catalyst was about 0.4 moles of S per mole of Pt. Catalyst with the same platinum load but with double or four-fold the sulphur content were prepared by appropriately increasing the amount of sulphidizing agent. Catalysts with different platinum loads were made up using the same procedure as above with a simultaneous increase in the amounts of hexachloroplatinic acid, caustic soda solution and sulphidizing agent. DE-PS 21 50 220 is a patent very hard too get. Anybody knows what it says. I'm especially interested in example 1. You've gotta love me. |
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Organikum (Hive Bee) 04-22-02 04:49 No 300005 |
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Try this | Bookmark | |||||
http://l2.espacenet.com/espacenet/bnsvie thats the GB version of what you are searching. Is there a working electrochemical way to dissolve Pt and Pd avoiding the fumes and dangers of aqua regia? Why difficult to get? ORGY |
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flipper (Hive Bee) 04-22-02 16:05 No 300160 |
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another question | Bookmark | |||||
You've gotta love me. |
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Organikum (Hive Bee) 04-22-02 17:59 No 300188 |
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calculation vs. imagination | Bookmark | |||||
Sorry flipper Iīm to lazy to recalculate but reading the reference itīs obvious that there is per gram platinum one gram DMSO used. Per four gram palladium are three gram DMSO used. The inventors didnīt calculate the way you do I bet. knowledge rains from espacenet ORGY |
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