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Phosphate Rock Digestion With Hydrochloric Acid

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Phosphate Rock Digestion With Hydrochloric Acid

In wet process with hydrochloric acid, HCl (34%) and phosphate rock react to form phosphoric acid and calcium chloride. This process makes it possible to avoid the formation of phosphogypsum, a phenomena which necessitates the use of larger reaction vessels with higher initial cost

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  • Radioactivity Contents in Dicalcium Phosphate and the

    Radioactivity Contents in Dicalcium Phosphate and the

    Potentially harmful phosphate-based products derived from the wet acid digestion of phosphate rock represent one of the most serious problems facing the phosphate industry. This is particularly true for dicalcium phosphate (DCP), a food additive produced from either sulphuric acid or hydrochloric acid digestion of raw rock material

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  • (PDF) Treatment of phosphate rocks with hydrochloric acid

    (PDF) Treatment of phosphate rocks with hydrochloric acid

    Jul 01, 2011 When phosphate rock is leached with hydrochloric acid, radium can be removed by co-precipitation with Ba0.4Ca0.6SO4 and uranium by extraction with a 5% solution of tributyl phosphate

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  • phosphate rock digestion with hydrochloric acid

    phosphate rock digestion with hydrochloric acid

    phosphate rock digestion with hydrochloric acid Phosphate acidulation utilizing HF acid - US Patent 6676914...... or of an alkaline earth metal with hydrochloric acid or hydrofluoric acid in excess as... which uses sulfuric acid to digest the phosphate rock.)

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  • (PDF) The hydrochloric acid route for phosphate rock

    (PDF) The hydrochloric acid route for phosphate rock

    Apr 24, 2007 When phosphate rock is leached with hydrochloric acid, radium can be removed by co-precipitation with Ba0.4Ca0.6SO4 and uranium by extraction with a

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  • US1235025A - Process of making dicalcium phosphate

    US1235025A - Process of making dicalcium phosphate

    In a method of making di-calcium phosphate, the steps which consist in treating phosphate rock with hydrochloric acid under heat, cooling the mixture to abut 30 C., treating the liquid product with

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  • Final - Phosphate Fertilizer Plants

    Final - Phosphate Fertilizer Plants

    fertilizer plants, where phosphate rocks are digested with an acid (e.g. sulf uric, nitric or hydrochloric acid). The tri-calcium pho sphate from the phosphate rock reacts with concentrated su lfuric acid to produce pho sphoric acid and calcium sulfate (an insoluble salt); and • The thermal process , where elemental phosphorous is

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  • Phosphate Rock - an overview | ScienceDirect Topics

    Phosphate Rock - an overview | ScienceDirect Topics

    5% of the phosphate rock is converted directly into other types of products. During the wet production process, the contaminants are distributed between the different (by-)products depending on the type of acid (sulfuric acid, hydrochloric acid, or nitric acid) used for digestion

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  • Di-calcium phosphate by direct acidulation of phosphate

    Di-calcium phosphate by direct acidulation of phosphate

    di-calcium phosphate by direct acidulation of phosphate rock. In general, when phosphate rock is treated with sulfuric acid, mono-calcium phosphate or phosphoric acid is formed. If less sulfuric acid is used, di-calcium phosphate should be formed theoretically, however only mono-calcium phosphate and undecomposed phos phate rock result in

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  • (PDF) SYNTHESIS OF DICALCIUM PHOSPHATE USED AS FEED

    (PDF) SYNTHESIS OF DICALCIUM PHOSPHATE USED AS FEED

    The brushite solubility was determined in the pH range 4.5-8.0 at 25 C, 30 C and 35 C6. Wet acid digestion of the phosphate rock with sulphuric acid and hydrochloric acid is commonly used for dicalcium phosphate production both acids used also lead to the enhancement of several radionuclides within the final product7,8

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  • NIOSHTIC-2 Publications Search - 10007643 - Hydrochloric

    NIOSHTIC-2 Publications Search - 10007643 - Hydrochloric

    The Bureau of Mines conducted laboratory tests to evaluate the production of high-purity h3po4 by hcl digestion and solvent extraction. Both batch and bench-scale continuous tests were made. Western phosphate rock concentrates were acidulated with hcl, and the digestion liquors were processed by solvent extraction. Phosphoric acid was extracted with isoamyl alcohol and recovered from the organic

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  • STANDARD CHARACTERIZATION OF PHOSPHATE ROCK

    STANDARD CHARACTERIZATION OF PHOSPHATE ROCK

    Dissolution of the sample using hydrochloric-nitric acid digestion. After dissolution, precipitation of the orthophosphate ions as quinoleine phospho-molibdate, the acid solution is passed at about 75 C through a filter, washed, dried with acetone. The obtained precipitate is weighed. Dissolution of the sample using perchloric acid

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  • Treatment of phosphate rocks with hydrochloric acid

    Treatment of phosphate rocks with hydrochloric acid

    Jul 17, 2010 The use of hydrochloric acid, did not receive much attention [8–11]. Solutions containing mono-calcium phosphate obtained by leaching phosphate rock using diluted hydrochloric acid were treated for uranium and lanthanides recovery prior to P 2 O 5 recovery. The separation of lanthanides with similar chemical properties is a challenging task

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  • Radioactivity contents in dicalcium phosphate and the

    Radioactivity contents in dicalcium phosphate and the

    Oct 30, 2009 The use of hydrochloric acid for digestion of phosphoric rock is less widespread, but it is the dominant method for production of DCP in Spain. The phosphate rock is partially dissolved in hydrochloric acid. Whereas the undissolved fraction is eliminated in the form of slag, in the dissolved fraction CaCO 3 is added in order to adjust the pH to

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  • (PDF) Effect of hydrochloric acid on leaching behavior of

    (PDF) Effect of hydrochloric acid on leaching behavior of

    Hydrochloric acid leaching kinetics of Gagi phosphate rock assaying 36.1% P 2 O 5 , 4.3% Al 2 O 5 , and 3.9% SiO 2 was examined. The phosphate rock mineralogical characterization indicated that

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  • Phosphate Rock Hydrochloric Acid | Cromalinsupport

    Phosphate Rock Hydrochloric Acid | Cromalinsupport

    When phosphate rock is treated with sulfuric acid , phosphoric acid is formed according to the following equation: Ca10 (PO4)6F2 + 10H2SO4 Figure 6. Hydrochloric Acid is an item added by the GregTech 5 mod. Sodium Nitrate & Hydrochloric Acid . Hydrochloric acid is a clear, colorless, highly pungent solution of hydrogen chloride (HCl) in water

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  • Phosphoric Acid Manufacturing Through Hydrochloric

    Phosphoric Acid Manufacturing Through Hydrochloric

    optimal acid-rock ratio conditions (Table-1). The results demonstrate that maximum P2O5 recovery is achieved from an acid-rock ratio of 1:1.2 w/v. The decomposition of phosphate rock with hydrochloric acid is an exothermic process, however, it was observed that temperature does not rise to the limit required for the maximum decomposition of rock

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  • Effect of Hydrochloric Acid on Leaching Behavior of

    Effect of Hydrochloric Acid on Leaching Behavior of

    hydrochloric acid may be used to selectively leach out the calcareous materials from low grade phosphate rock rather than the dissolution of apatite. In this work, the suitability of dilute hydrochloric acid has been studied to leach out the calcareous and dolomitic gangue materials from the indigenous low grade phosphate rock

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  • The Nature and Distribution of Fluorine in the

    The Nature and Distribution of Fluorine in the

    exists that employs hydrochloric acid for phosphate ore digestion followed by liquid-liquid extraction for separation of phosphoric acid from the crude reaction mixture. Fluorine is an important constituent of phosphate ore but its pres ence as an impurity in phosphoric acid is usually objection able

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  • Calcium phosphate | Ca3(PO4)2 - PubChem

    Calcium phosphate | Ca3(PO4)2 - PubChem

    The phosphate ions in calcium phosphate likely react with hydrochloric acid in the stomach to neutralize the pH. In toothpaste and in systemic circulation, calcium phosphate provides a source of calcium and phosphate ions to support remineralization of the teeth and bone homeostasis respectively. The increase in plasma calcium reduces calcium flux from osteocyte activity by reducing the

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  • The hydrochloric acid route for phosphate rock | Semantic

    The hydrochloric acid route for phosphate rock | Semantic

    When phosphate rock is leached with hydrochloric acid, radium can be removed by co-precipitation with Ba0.4Ca0.6SO4 and uranium by extraction with a 5% solution of tributyl phosphate in hexane or Varsol. Phosphoric acid is then separated from calcium chloride solution and other impurities by extraction with undiluted tributyl phosphate. The lanthanides can be precipitated from the raffinate by

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