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Phosphogypsum Wikipedia

Phosphogypsum is a side-product from the production of phosphoric acid by treating phosphate ore (apatite) with sulfuric acid according to the following reaction: Ca5(PO4)3X + 5 H2SO4 + 10 H2O → 3 H3PO4 + 5 (CaSO4 · 2 H2O) + HX where X may include OH, F, Cl, or BrPhosphogypsum is radioactive due to the presence of naturally occurring uranium and thorium, and their
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PRODUCTION OF PHOSPHORIC ACID Product Stewardship

2.1 Raw Materials for Phosphoric Acid Production 7 2.2 Principles of the Process 10 2.3 Production Processes 12 2.4 Emission Abatement 24 2.5 Gypsum Disposal 27 3. DESCRIPTION OF STORAGE AND TRANSFER EQUIPMENT 28 3.1 Raw Materials Storage 28 3.2 Phosphoric Acid Storage 29 4. ENVIRONMENTAL DATA 29 4.1 Input Requirements 29 4.2 Output Production 30
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Phosphoric acid Essential stone Industry

Phosphoric acid is produced from fluorapatite, known as phosphate rock, 3Ca 3 (PO 4) 2.CaF 2, by the addition of concentrated (93%) sulfuric acid in a series of well-stirred reactors. This results in phosphoric acid and calcium sulfate (gypsum) plus other insoluble impurities.
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Gypsum, Micro Mix, Water Soluble Fertilizer, Di Ammonium

Gypsum is a by-product available from Phosphoric Acid Plant and used in production of Ammonium Sulphate. GSFC has been first in the country to develop and implement successfully Phospho-Gypsum process for manufacture of Ammonium Sulphate.
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Gypsum Crystallization during Phosphoric Acid Production

Gypsum Crystallization during Phosphoric Acid Production: Modeling and Experiments Using the Mixed-Solvent-Electrolyte Thermodynamic Model You Peng,†,‡ Zhilong Zhu,†,‡ Richard D. Braatz,† and Allan S. Myerson*,† †Department of stone Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States S Supporting Information
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Extraction of lanthanides from the phosphoric acid

Lanthanide nitrate salts were added to the phosphoric acid to 50 mg Ln/kg acid to facilitate analysis. For the determination of K A,DH ′, industrial phosphoric acid and industrial gypsum were taken from the Norsk Hydro HDH production process (a continuous recrystallization) and
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Byproducts The Phosphate Risk

In the process, sulfuric acid is added to the phosphate to create phosphoric acid — which is easily absorbed by plants. Phosphogypsum (or “gypsum”), a radioactive material, is a byproduct of this process. Because it cannot be disposed of in the usual way, gypsum is stored in huge piles, called gyp stacks that cover 600 acres and rise to
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AP-42, CH 8.9: Phosphoric Acid

8.9 Phosphoric Acid 8.9.1 General1-2 Phosphoric acid (H3PO4) is produced by 2 commercial methods: wet process and thermal process. Wet process phosphoric acid is used in fertilizer production. Thermal process phosphoric acid is of a much higher purity and is used in the manufacture of high grade chemicals,
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» Gypsum

Gypsum is a by-product available from Phosphoric Acid Plant and used in production of Ammonium Sulphate. GSFC has been first in the country to develop and implement successfully Phospho-Gypsum
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Gypsum Crystallization during Phosphoric Acid Production

Gypsum Crystallization during Phosphoric Acid Production: Modeling and Experiments Using the Mixed-Solvent-Electrolyte Thermodynamic Model You Peng,†,‡ Zhilong Zhu,†,‡ Richard D. Braatz,† and Allan S. Myerson*,† †Department of stone Engineering, Massachusetts Institute of Technology
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Foskor Acid Division Richards Bay

Acid division Richards Bay. View on Google Maps. The Richards Bay plant produces sulphuric acid (H2SO4), phosphoric acid (P2O5) and granular fertiliser (MAP/DAP). H2SO4 is primarily an input in the production of P2O5. The granular fertiliser plant operates independently from the acid
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Byproducts The Phosphate Risk

In the process, sulfuric acid is added to the phosphate to create phosphoric acid — which is easily absorbed by plants. Phosphogypsum (or “gypsum”), a radioactive material, is a byproduct of this process. Because it cannot be disposed of in the usual way, gypsum
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Booklet No. 4 of 8: PRODUCTION OF PHOSPHORIC ACID

2. DESCRIPTION OF PRODUCTION PROCESSES 7 2.1 Raw Materials for Phosphoric Acid Production 7 2.2 Principles of the Process 10 2.3 Production Processes 12 2.4 Emission Abatement 24 2.5 Gypsum Disposal 27 3. DESCRIPTION OF STORAGE AND TRANSFER EQUIPMENT 28 3.1 Raw Materials Storage 28 3.2 Phosphoric Acid
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Phosphoric acid Wikipedia

Phosphoric acid, also known as orthophosphoric acid or phosphoric(V) acid, is a weak acid with the stone formula H 3 P O 4.It is normally encountered as a colorless syrup of 85% concentration in
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What is phosphoric acid uses and rust removal.

There are two methods used in the production of phosphoric acid. The difference between the two is the purity of the product produced. The products of this reaction are phosphoric acid and calcium sulfate or gypsum, along with other impurities. At this stage, water is added so that gypsum
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Phosphogypsum An Industrial Byproduct with Value

For every ton of phosphoric acid produced, around 5 tons of phosphogypsum are produced, making this a substantial source of industrial waste, especially given in the context that phosphatic fertilizer production
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