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Sunday, August 2, 2020 | History

2 edition of Continuous-circuit preparation of phosphoric acid from Florida phosphate matric found in the catalog.

Continuous-circuit preparation of phosphoric acid from Florida phosphate matric

White, J. C.

Continuous-circuit preparation of phosphoric acid from Florida phosphate matric

by White, J. C.

  • 234 Want to read
  • 26 Currently reading

Published by Dept. of the Interor, Bureau of Mines in [Washington] .
Written in English

    Subjects:
  • Phosphate mines and mining -- Environmental aspects -- Florida,
  • Phosphates

  • Edition Notes

    Bibliography: p. 22

    Statementby J. C. White, T. N. Goff, and P. C. Good
    SeriesReport of investigations - Bureau of Mines ; 8326
    ContributionsGoff, T. N., Good, P. C., United States. Bureau of Mines
    The Physical Object
    Pagination22 p. :
    Number of Pages22
    ID Numbers
    Open LibraryOL14914993M

    Separation of refractory rock phosphate (P 2 O 5 = %) from the Dalir area, Iran, containing quartz, calcite and other impurities, by calcination and flotation processes has been successfully used to upgrade the phosphate values. White JC, Goff TN and Good PC () Continuous-Circuit Preparation of Phosphoric Acid from Florida Phosphate Matrix. PHOSPHORIC ACID reacts exothermically with bases. May react with active metals, including such structural metals as aluminum and iron, to release hydrogen, a flammable gas. Can initiate the polymerization of certain classes of organic compounds. Reacts with cyanide compounds to release gaseous hydrogen cyanide.

    common routes for phosphoric acid production in this case are the di-hydrate and hemi-hydrate processes. Using the wet method, phosphoric acid is produced in reactors that facilitate the mixing and contact of phosphate rock with an aqueous solution of sulfuric and phosphoric acid. The phenomenon can be described by the following two-stage reaction. Innovations in beneficiation technology for low grade. Good PC Beneficiation of Unweathered Indian Calcareous Phosphate Rock by Calcination and Hydration US Bureau of Mines Report No Washington Google Scholar White JC Goff TN and Good PC Continuous Circuit Preparation of Phosphoric Acid from Florida Phosphate Matrix.

    acid (H 3 PO 3). Thus, there are two types of P closely as-sociated with crop production. While growers are familiar with P-containing fertilizers, the abundance of similar terms (such as phosphoric acid, H 3 PO 4, and phosphorous acid, H 3 PO 3) may create some confusion about the actual content and efficacy of these products. Table 1 lists some. USA US05/, USA USA US A US A US A US A US A US A US A US A US A Authority US United States Prior art keywords phosphoric acid phosphate organic solvent sub process Prior art date Legal status (The legal status is an assumption .


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Continuous-circuit preparation of phosphoric acid from Florida phosphate matric by White, J. C. Download PDF EPUB FB2

Get this from a library. Continuous-circuit preparation of phosphoric acid from Florida phosphate matrix. [J C White; T N Goff; P C Good; United States. Bureau of Mines.]. This report describes research in which unbeneficiated, dry, south- central Florida phosphate matrix was digested with sulfuric acid in a continuous-circuit, five-tank reactor to yield phosphoric acid and gypsum residue.

Feed capacity of the reactor was pounds (45 kg) of dry matrix per hour day. Continuous-circuit preparation of phosphoric acid from Florida phosphate matrix / By J. (Jack C.) White, P. (Philip C.) Good and T. (Thomas N.) Goff Abstract.

phosphoric acid could be manufactured through the HCl route using low quality indigenous rock phosphate. The acid, manufactured through this process using amyl alcohol as solvent, is technically feasible. Extraction of phosphoric acid with amyl alcohol allows eliminating impurities up to a great extent and yields phosphoric acid of good quality.

Phosphoric acid (H 3 PO 4, PA) is an industrial acid, produced from two main types of phosphate rock: sedimentary and igneous. In the classical wet process, wet process PA is produced by a. Various ternary and quaternary liquid‐liquid phase equilibrium data for water + phosphoric acid + solvent(s) have been reported.

Salting‐out, solvent, and temperature effects on the binodal curve and the tie lines have been highlighted and the capability of solvents with different functional groups to extract phosphoric acid from water has been compared.

Phosphoric acid (PA) is an important industrial chemical used as an intermediate in the fertilizer industry, for metal surface treatment in the metallurgical industry and as an additive in the food industry.

The PA industry is spread out worldwide in Europe, Asia and America, including countries that operate phosphate rock (PR) mines and produce PA, phosphatic fertilizers and phosphate.

Phosphoric acid is a type of basic raw material widely used in many areas such as agricultural feed, fertilizers, detergents and food additives. Commercial phosphoric acid is commonly manufactured by thermal and wet process.

Wet process phosphoric acid (WPA) is produced by decomposition of phosphate rock. If phosphate ore is digested by phosphoric acid, the following reactions take place: C a 10 (P O 4) F 2 + 4 H 3 P O 4 → 10 C a H P O 4 + 2 H F → C a 10 (P O 4) 6 F 2 + 14 H 3 P O 4 → 10 C a (H 2 P O 4) 2 + 2 H F → Temperature and concentration of phosphoric acid are important parameters which can determine the amount of dissolution as.

Florida’s Phosphate Deposits. A blanket of phosphate deposits covers much of peninsular Florida. In the areas that are considered economical to mine, the matrix layer, which consists of approximately equal parts phosphate rock, clay, and sand, averages 12 to 15 feet in thickness.

Phosphorite, or phosphate rock, is the raw material of phosphoric acid production. It has also been regarded as the most important secondary rare earth element (REE) resource due to low contents of rare earth elements contained in the ore.

In Florida, there is about 19 Mt of phosphate rock mined annually. After beneficiation, the phosphate rock concentrate is utilized to produce phosphoric. The P amendments were added as reagent-grade phosphoric acid H 3 O 4 (PA) and/or ground phosphate rock (PR).

The PR (Phosphate Mining Company (White Springs, FL). It mainly consists of fluoroapatite [Ca 5 (PO 4) 3 F] and is much less soluble (K sp ∼ 10 −60) than PA. Innovations in beneficiation technology for low grade.

Good, PC () Beneficiation of Unweathered Indian Calcareous Phosphate Rock by Calcination and Hydration US Bureau of Mines, Report NoWashington Google Scholar White JC, Goff TN and Good PC () Continuous-Circuit Preparation of Phosphoric Acid from Florida Phosphate Matrix.

All phosphoric acids are acidic without being oxidizing, in contrast to mineral acids like nitric acid (31). In water, the dissociation of the phosphoric acid and the release of the protons follow the equilibria shown in Figure 6. Orthophosphoric acid has only one strongly ionizing proton, with a pK1 of The second proton, with a pK of Manufacture.

Phosphoric acid is produced industrially by two general routes. In the wet process a phosphate-containing mineral such as calcium hydroxyapatite is treated with sulfuric acid. + + ↓ +Fluoroapatite is an alternative feedstock, in which case fluoride is removed as the insoluble compound Na 2 SiF phosphoric acid solution usually contains 23–33% P 2 O 5.

Phosphoric Acid General 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.

Prior to the use of this method, samples were analyzed calorimetrically using vanadate-molybdate color reagent.

However, the analysis was not specific for H 3 PO 4 and an acid titration was needed for all samples above the PEL. Uses () Most phosphoric acid is used as ammonium phosphate for fertilizer and in the manufacture of.

Production of Disodium Phosphate (DSP) Na 2 HPO 4. g of phosphoric acid of the preceding step that contains 22% P 2 O 5 is set in a beaker. pH is adjusted to by addition of NaOH 50%. g of NaOH 50% is added in order to reach pH The mixture is stirred for 30 minutes at 60° C.

to allow complete reaction. This Bureau of Mines report describes the preparation of phosphoric acid directly from phosphate ore, without prior beneficiation, in a small-scale continuous process research unit, as part of an effort to improve minerals and metals recovery from domestic resources while minimizing environmental effects.

This Bureau of Mines report describes the preparation of phosphoric acid directly from phosphate ore, without prior beneficiation, in a small-scale, continuous process research unit, as part of an effort to improve minerals and metals recovery from domestic resources while minimizing environmental effects.

Phosphate is a salt of phosphoric acid. In organic chemistry, a phosphate, or organophosphate, is an ester of phosphoric c phosphates are important in biochemistry, biogeochemistry and ecology. Phosphate (Pi) is an essential component of life.

In biological systems, phosphorus is found as a free phosphate ion in solution and is called inorganic phosphate.Phosphoric acid, a principal product of the phosphate fertilizer industry, was included in the original list of toxic chemicals requiring reporting for the inventory.

The inclusion of phosphoric acid led to several phosphate fertilizer complexes being listed in the annual top ten facilities in amount of toxic chemicals released.Pure phosphoric acid is a crystalline solid (melting point ° C, or ° F); in less concentrated form it is a colourless syrupy crude acid is prepared from phosphate rock, while acid of higher purity is made from white phosphorus.

Phosphoric acid forms three classes of salts corresponding to replacement of one, two, or three hydrogen atoms.