silver bars for sale near me

admin1 Precious metals 2021-04-03 14:14 0

 
   The silver bars obtained by using any of the foregoing methods containing for sale near me are treated with an aqueous solution of sulfuric acid of about to about about about about about about 100 weight. hour. The resulting mixture is stirred by any suitable means and heated to a temperature of about to about 1000 Å. The reaction between the platinum flakes and the impurities is not only promoted by the increase in temperature, but also exothermic, and in many cases, it is preferable to keep the temperature of the reaction mixture in the range of about 1500 to about 1000 Å. The use of sulfuric acid with a concentration exceeding the theoretically required concentration will ensure the continuous presence of a sufficient amount of free acid to dissolve substantially all impurities and substantially completely remove the combined fluoride. The platinum flakes are returned to the Pacific precious metals in an aqueous solution that is preferably about to about about 100% by weight. As mentioned before, the reaction is exothermic, and since heating promotes the reaction rate, the reaction time is usually shortened to about to about hours. In short, the preferred method of the present invention involves reacting a fluoride-containing platinum sludge with an aqueous solution of sulfuric acid in an amount of about to about 1500 by weight. The resulting mixture is continuously stirred, and heated to about 100 Å to about 100 Å, if necessary, and maintained at a temperature range of about 100 Å to about 100 Å for about hours to about hours. The following examples will further illustrate the method of the present invention for silver bars for sale near me, however, this is not intended to unduly limit the present invention to the concentrations and conditions used.


 
   The platinum-containing sludge used in the examples was obtained from a commercially inactivated catalytic compound, which has been used for the reforming of hydrocarbons. The composite material has previously been treated to remove any easily soluble platinum flakes and coke and other carbonaceous materials. The composite material is then treated with sulfuric acid to dissolve a large amount of refractory inorganic oxide contained therein. Example A gram of silver-containing crucible was weighed into a milliliter beaker. The sludge contained solids other than platinum by weight and was contaminated by fluoride. Pacific Precious Metals added milliliters of solution to it. Heavy sulfuric acid. This amount of sulfuric acid and the water phase of the sludge produce a sulfuric acid concentration by weight. The resulting mixture was digested on a hot plate at the temperature introduced for hours. After digestion, add milliliters of water to allow the solution to cool and settle. The liquid phase was removed by decantation, the silver value and the remaining solid were washed four times with milliliters of deionized water, and each resulting liquid phase was removed by decantation. Digest the second batch of silver-containing crucibles in the weight of sulfuric acid solution at the temperature described for hours. The resulting liquid phase was removed by decantation, and the solid was thoroughly washed with deionized water as previously described. The digested and washed solids were dried overnight at a temperature of, and then the dried solids were analyzed for fluoride concentration and the percentage of solids other than platinum. The following table shows the analysis results of the treated solids, in which it is easy to determine that the method of the present invention greatly reduces the concentration of solids other than platinum, and then completely removes them. Combine fluoride. Solid substances other than platinum are based on wet sludge. In Example II, gram of platinum-containing sludge was weighed into a milliliter beaker, and platinum flakes recovered the weight. The sludge contained solids other than the silver crucible by weight and was contaminated by fluoride, and added milliliters of sulfuric acid by weight to it.


 
   This amount of sulfuric acid and the aqueous phase of the sludge give sulfuric acid whose concentration is by weight. The resulting mixture was digested on a hot plate at the temperature introduced for hours. After the silver bar for sale near me, the liquid phase was decanted, and the remaining solid was washed with deionized water. The digested and washed solids were dried overnight, and then analyzed for fluoride concentration and the percentage of solids other than the silver crucible. Abstractly collect one or more catalysts containing at least one type of platinum flakes from spent catalysts by alkaline leaching from silver bars and vanadium metals for sale near me; leaching the catalysts to the alkaline leaching stage in the atmosphere; leaching the leached The slurry is separated into a first liquid stream and a first solid; the first solid is leached through a caustic soda leaching process; the secondary leaching slurry is separated into a second liquid stream and a second solid; the first and second liquid streams are collected; and combined by oxidation The liquid flow of cooling and oxidation; Pacific precious metals adjusts the value of the oxidation liquid flow; the cooling of the oxidation liquid flow is contacted with the organic solvent containing the extractant; the soluble metal substance is removed from the organic phase; the water phase is adjusted to selectivity At least one metal is deposited as a metal salt; the regeneration method of the silver crucible is alkaline leaching, metal regeneration, platinum-containing flake carrier, metal sulfide. The present invention relates to the recovery of products from spent catalysts, especially silver bars for sale from petroleum nearby. And recycled metals, oil and fuel-rich alumina products. It is known that the weight recovery of platinum flakes and the petroleum hydrocarbon oil on the spent catalyst will hinder the economics of metal regeneration. The oil present on the catalyst blocks the pores of the catalyst and requires more stringent conditions to oxidize the surface metals through water metal oxidation. In addition, oil can cause undesirable organic pollution in leaching and recycling products. The methods commonly used to deoil the catalyst, such as thermal deoiling or calcination, are unsatisfactory and cause the alumina to react with the metal at high temperatures, which ultimately leads to a decrease in the yield of platinum flakes.


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