Menu
United States Patent 6183712 Abstract A method of producing dicalcium phosphate from calcium phosphate includes reacting the calcium phosphate with a mineral acid such as sulphuric acid to produce a calcium salt and phosphoric acid The calcium salt may then be hydrolyzed to form a calcium alkali which may then be reacted with the phosphoric acid to produce dicalcium phosphate Also a
Get Price
In United States Patent No 2 143 438 dated January 10 1939 I have described a process for the production of monocalcium chlorophosphate which process comprises treating phosphate rock with hydrochloric acid adding thereto sufficient phosphoric acid or monocalcium phosphate to convert all of the lime present in the
Get Price
used to precipitate phosphoric acid in the dicalcium phosphate DCP form [21] Also Na 2 CO 3 and/or NaOH are used to precipitate sodium monohydrogen phosphates and sodium dihydrogen
Get Price
This means that the dicalcium phosphate is exposed to increasingly alkaline conditions which tend to convert it back into a salt with a higher calcium to phosphate ratio Figure period B and ultimately to hydroxyapatite since this is the most stable form in the neutral pH range This process is described by the reaction 10 CaHPO 4 8 OH − → Ca 10 PO 4 6 OH 2 4 HPO 4 2 −
Get Price
dicalcium phosphate machinery production process Know More Mar 27 2024 0183 32 Dicalcium Patent US4707361 Granular anhydrous dicalcium phosphate Nov 17 1987 A granular anhydrous dicalcium phosphate having a particle of
Get Price
Contribute to sbmboy/en development by creating an account on GitHub
Get Price
US T962001 I4 chemical patent summary
Get Price
It was known that the phosphate rocks contain 3 4% fluoride During the manufacture of H 3 PO 4 by treating the rock with H 2 SO 4 ∼20% of fluoride is volatilized as HF and SiF 4 ∼65% is lost in the gypsum residue and 15% remains in the acid The presence of fluoride in the acid is undesirable which may cause corrosion and/or
Get Price
Dicalcium Phosphate Patents Grinding Mill China patent production of dicalsium phosphate from ash Grinding Mill China US Patent 4524054 Process for the production of dicalcium Process for the production of dicalcium phosphate In the process described in this patent Learn More Patent US5284700 Mineral wool treated with dicalcium phosphate Google
Get Price
Manufacturing Process Of Dicalcium Phosphate Pdf 2013710Processes for the manufacture of feedgrade dicalcium phosphate 26 Oct 1976 The process comprises the reaction of an excess of phosphate rock with aqueo Download PDF 3988420 PDF help US Patent 3033669 Process for the manufacture of dicalcium phosphate May 1962 Strauchen et al More
Get Price
Determinants of National Advantage Competitiveness Reference Michael Porter Competitive Advantage of Nations A nation may achieve international success in an industry because of four broad attributes that shape the environment in which the local firms compete or impede the creation of competitive These are i ii iii Factor Conditions factors of production
Get Price
Engrais phosphatés L Élémentarium Il est constitué principalement par un mélange de phosphate monocalcique et de sulfate de calcium Sa fabrication nécessite environ 710 kg de phosphate naturel à 63 % de PTC et 370 kg de H 2 SO 4 à 100 % pour 1 t de superphosphate
Get Price
Product obtained chemically and composed of equal parts of dicalcium phosphate and mono calcium phosphate CaHPO 4 Ca H 2 PO 4 2 O Total phosphorus Calcium Defluorinated rock phosphate Product obtained by grinding purified and appropriately defluorinated natural phosphates Total phosphorus Calcium Degelatinised bone meal Degelatinised sterilised and ground bones
Get Price
The present invention relates to a process for the manufacture of disodium phosphate of a high purity without utilizing organic solvents According to the process monosodium sulfate is reacted at a temperature in the range of 40 to 100 degrees C with a phosphate constituent selected from phosphate rock dicalcium phosphate or mixtures
Get Price
patent of dicalcium phosphate from rock phosphate Know More US7101522B2 Production of dicalcium phosphate or A process is provided for the production of dicalcium phosphate form a phosphate source material in which a solution of phosphoric acid is produced by the action of a suitable mineral acid generally sulphuric acid on a phosphate
Get Price
A method of preparing dicalcium phosphate from phosphate rock wherein the rock is treated with a mixture of water carbonyl and sulfur dioxide Solids are separated from the liquid phase The solid phase consists of a mixture of gangue and calcium alpha hydroxysulfonate Carbonyl and part of the sulfur dioxide are recovered from the solid by low temperature thermal decomposition
Get Price
Show Description Dicalcium phosphate can also cause feelings of nausea regarding health questions and concerns Nutrition 1/4 cup 67g serving 150 Calories 12g Fat 9g Carbs 0g Dietary Fiber 1g Protein Vegan If you make a purchase through one of the links on this website I may earn a small commission at no additional cost to you
Get Price
Processes for the manufacture of feed 1976/10/26 0183 32 The phosphate rock is preground so that preferably about 70 of the phosphate rock particles are smaller than about 45 US mesh The term free acidity as used in the present invention has the usual meaning which is percent P 2 O 5 solubilized as phosphoric acid H 3 PO 4 from the total P 2 O 5 in
Get Price
United States Patent Classification 423/308000000 428/402000000 Hydroxyapatite Calcium Phosphates Their Method of Preparation and Their Applications 7767300 12273875 USPTO Application Nov 19 2024 Publication Aug 03 2024 John Godber Lorraine Leite Abstract The present invention is directed to calcium phosphates in granular form having an X ray diffraction pattern characteristic of
Get Price
Dicalcium phosphate manufacture United States Gypsum … What is claimed is 1 A process for producing dicalcium phosphate from rock phosphate which comprises a Continuously feeding finely divided rock phosphate sulfuric acid and sea water to a first mixing zone and mixing them to form a slurry the quantity of sulfuric acid and sea water charged being about equal to six equivalents of
Get Price
Phosphate rock is a complex material the principal mineral constituent fluorapatite contains calcium phosphate fluoride carbonate and many other elements or groups bound together in a crystal lattice Analysis of several typical grades of Florida rock is found in Table When the rock is treated with a strong mineral acid the apatite lattice is destroyed and the phosphate constituent
Get Price
The non fertilizer phosphate chemicals consisted of three subcategories which were considered separately for more meaningful separation and division of waste water treatment and subsequent development of effluent guidelines These subcategories are defluorinated phosphate rock defluorinated phosphoric acid and sodium phosphates Notice of
Get Price
Phosphate rock and its derivative porous hydroxyapatite were evaluated for the removal of toxic organic chemicals from aqueous solutions The first sorbent was natural phosphate NP from Bengurir
Get Price
Pretreatment Standards for Existing Sources Subpart D Defluorinated Phosphate Rock Subcategory The pretreatment standard under section 307 b of the Act for a source within the defluorinated phosphate rock subcategory which is a user of a publicly owned treatment works and a major contributing industry as defined in HO CFR 128 and which would be an existing point source subject to section
Get Price
One common way to enhance the degradation properties of calcium phosphate scaffolds is to combine a high soluble phase β TCP with an insoluble phase HA to create material called BCP ceramics 8 A mixture of HA and β TCP produces biphasic calcium phosphate BCP which possesses the reactivity of β TCP and the stability of HA providing more bioactivity involving more new bone
Get Price
Google Patents There is disclosed a process for preparing fertilizers containing dicalcium phosphate from phosphates of mineral origin by mechanical activation
Get Price
The best values in terms of quality and quantity of dicalcium phosphate from locally phosphate rock were achieved at acid concentration of 10% w/w reaction time of hrs at 30°C and pH values of during precipitation of impurities and for the final synthesis of dicalcium phosphate Pure dicalcium phosphate % was prepared using above method Purity of the
Get Price
US 4113842 A chemical patent summary
Get Price
On the Phosphate Rock Beneficiation for the Production of Jan 01 1992 · For grinding phosphate rock the energy used is about 2535 MJ per tonne and the process water needed is around 13 m3 per tonne while the average values for ore flotation units are 625 MJ per tonne and 53 m3 per ton for energy and water use respectively So far the challenge in the flotation of high carbonate containing
Get Price
Dicalcium phosphate DCP an animal feed additive was synthesized from phosphate rock under optimum condition of pH temperature of reaction mixture time of reaction and acid concentration Concentrated slurry of 200 mesh sieve calcium hydroxide was used to remove impurities Solution was filtered and pH of filtrate was again adjusted to precipitate dicalcium phosphate
Get Price