In a process for producing zinc sulphate monohydrate the steps comprising concentrating a zinc sulphate solution by evaporation while maintaining its acidity at about from 1 to about 2 as.
A process for the production of zinc and sulphuric acid comprising leaching solid zinc sulphate with an aqueous liquor to form a leach liquor electrolysing the latter to obtain zinc and a spent.
This invention relates to a method for the removal of iron as hematite from a zinc sulphate solution in atmospheric conditions during the electrolytic preparation of zinc. According to the method the pH of the iron-containing solution is adjusted to a value of at least 2.7 oxygen-containing gas is fed into the solution and part of the hematite thus formed is recirculated to the precipitation .
The above is achieved by reacting iron and a sulfuric acid solution having a concentration within the range of between about 10-90 percent for a period of time sufficient to reduce the free acid concentration to between about 2-35 percent separating the resulting solution from the unreacted iron filtering the solution to remove any precipitation and impurities contained therein adding concentrated sulfuric
The invention further includes an improved selective leaching process for the production of high purity iron sulfate monohydrate from feed materials that contain partially soluble sulfides of metals like zinc andor nickel and an improved process for concentrating the valuable non-ferrous metal components of the feed and for recovery of these components in a sulfide residue of high commercial value.
having a particle size below 240 mesh are added. The mixture is heated in a furnace provided with a pan equipped with rotary plows to 270 degrees C. and after hours the reaction mixture is leached.
A process is provided for converting iron such as scrap iron directly to ferrous sulfate monohydrate in the absence of intermediate formation of ferrous sulfate heptahydrate the use of pressure vacuum andor excessively high operating temperatures. The above is achieved by reacting iron and a sulfuric acid solution having a concentration .
A process for the production of zinc and sulphuric acid comprising leaching olid zinc sulphate with an aqueous liquor to form a leach liquor electrolysing the latter to obtain zinc and a spent electrolyte comprising sulphuric acid concentrating the sulphuric acid content in the spent electrolyte to precipitate the bulk of the residual zinc sulphate as a solid separating the latter and so obtaining a sulphuric acid
A method of recovering iron from a zinc sulfate solution according to an embodiment of the present disclosure is associated with recovering iron from a zinc sulfate solution produced by a leaching process in which zinc ore is dissolved in sulfuric acid. The method comprises a conditioning process including a step of reducing a conditioning process input solution which is the zinc sulfate .
The invention further includes an improved selective leaching process for the production of high purity iron sulfate monohydrate from feed materials that contain partially soluble sulfides of metals like zinc andor nickel and an improved process for concentrating the valuable non-ferrous metal components of the feed and for recovery of these components in a sulfide residue of high commercial value.
Demand for zinc sulfate as a micronutrient in fertilizers and animal feed is forecast to grow at 12 annually in the United States from 2006 to 2011 but could grow at 5 if more acres of corn are planted for the production of ethanol.
A process for the production of tribasic lead sulphate monohydrate comprising reacting lead sulphate with a reagent selected from the group consisting of aqueous ammonia mixtures of aqueous ammonia and solid ammonium sulphate and solutions containing aqueous ammonia and ammonium sulphate the reagent containing a minimum of 0.24 ml 35 aqueous ammonia per gram of lead sulphate and
A process is provided for converting iron such as scrap iron directly to ferrous sulfate monohydrate in the absence of intermediate formation of ferrous sulfate heptahydrate the use of pressure vacuum andor excessively high operating temperatures. The above is achieved by reacting iron and a sulfuric acid solution having a concentration within the range of between about 10-90 percent for a period of
Jan 09 2012 Production Of High Purity Zinc Sulfate in the US. Zinc Sulfate compounds with previously unachieved purity expects Old Bridge Chemicals from its new production facility in New Jersey. The application of new state of the art technology enabled the construction of the companys most modern facility officials say.
The invention relates to an improved process for the production of practically non-hygroscopic easily grindable copperII sulfate monohydrate which is stable even in finely ground state and can be applied as trace element additive in animal fodders by neutralizing the free sulfuric acid content of copperII sulfate pentahydrate with sodium potassium or ammonium hydroxide carbonate or .
Sep 16 2011 I am dealing with wet process zinc oxide by ammonium carbonate us patent 4071357. We have to make project on a chemical plant. So I have selected ZINC OXIDE POWDER making plant which is useful in making zinc oxide active. I have to make total process for making zinc oxide powderwet process.
Sep 16 2011 I am dealing with wet process zinc oxide by ammonium carbonate us patent 4071357. We have to make project on a chemical plant. So I have selected ZINC OXIDE POWDER making plant which is useful in making zinc oxide active. I have to make total process for making zinc oxide powderwet process.
A method of recovering iron from a zinc sulfate solution according to an embodiment of the present disclosure is associated with recovering iron from a zinc sulfate solution produced by a leaching process in which zinc ore is dissolved in sulfuric acid. The method comprises a conditioning process including a step of reducing a conditioning process input solution which is the zinc sulfate .
Jan 09 2012 Production Of High Purity Zinc Sulfate in the US. Zinc Sulfate compounds with previously unachieved purity expects Old Bridge Chemicals from its new production facility in New Jersey. The application of new state of the art technology enabled the construction of the companys most modern facility officials say.
Aug 27 1993 A process is disclosed for the production of free-flowing non-caking stable granular ammonium sulphate containing micronutrients comprising granulating ammonium sulphate in the presence of a granulating aid which is stripped zinc electrolyte derived from an electrolytic zinc
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