The paper describes new development of the process that takes commercial sulfuric acid and Potassium chloride as starting material to make potassium sulfate studies basic principle of three phase extraction that the process used lists the experimental data and analyzes it with view of economy .

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The synthesis methods of Nipagin Esters Catalyzed by sulfuric acid p-toluene sulfonic acid ferric sul-fate hydrate ferric chloride hexahydrate aluminium chloride hexahydrate rare earth compound solid super acid and heteropoly acid were reviewed .

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So far potassium sulfate has been produced mainly by the reaction of concentrated sulfuric acid and potassium chloride .

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Dealed the sample with sulfuric acid reduced As (u2174) to As (u2172) with the thiurea-ascorbic acid and then the content of arsenic in poly aluminium chloride was determined by hydride generation-atomic fluorescence spectrometry .

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The complex of antimony with ferrone produces a good and sensitive catalytic wave in 0.04M sulfuric acid-0.40 % ascorbic acid-0.65M sodium chloride solution . The peak potential of derivative wave appears at -0.3V ( vs S. C. E ) .

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Recovery of silver zinc and lead from flue dust of zine metallurgy has been systematically studied in this paper . The optimum process parameters for extraction of zinc by dilute sulfuric acid leaching and extractions of silver and lead by calcium chloride leaching have been investigated .

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The assay of sulfuric acid-carbazole was used to determine the contents of the glucuronic acid the method of sedimentation by barium chloride for the contents of sulfate radical and the assay of sulfuric acid-cysteine for the fucose .

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This set of process technology was designed to produce chemical products such as sulfuric acid calcium chloride ammonium hydroxide and dry ice using phosphorus gypsum .

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Leaching of a copper residue produced by selected oxidation leaching of a nickel matte in oxygenated sulfuric acid solution with the participation of chloride was investigated .

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The discharge characteristics of the batteries at 5 u03a9 were investigated for various concentrations of hydrogen peroxide sulfuric acid and ammonium chloride .

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The main processes of bisphenol-A including sulfuric acid process hydrogen chloride process and ion-exchange resin process are briefly introduced .

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Sulfuric acid ammonium chloride sodium hydroxide and ethanol were selected as coagulation bath under different coagulation temperature and coagulation time to manufacture HEC membranes .

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In the light of the general situation and characteristics of the potash resources in china production methods are offered of the conversion of sulfuric acid or sulfate and potassium chloride into potassium sulfate and the extraction of potassium sulfate from sea water and bittern .

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