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This is particularly true for dicalcium phosphate (DCP), a food additive produced from either sulphuric acid or hydrochloric acid digestion of raw rock material. This study determined the natural occurring radionuclide concentrations of 12 DCP samples and 4 tricalcium phosphate (TCP) samples used for animal and human consumption, respectively. Metal concentrations (Al, Fe, Zn, Cd, Cr, As, Hg
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 hydroxysulfonate. Carbonyl and part of the sulfur dioxide are recovered from the solid by low temperature thermal decomposition.
USA Process of making dicalcium phosphate. UNITED STATES PATENT OFFICE., 0F BROOKLYN, NEW YORK. PROCESS OF MAKING DICALCIUM PHOSP. Largescale crushing amp; screening amp; milling plants. Offer efficient, costeffective services for you. +7(927)687 07 58 [email protected] Piskunov street, Irkutsk. Russian Federation. Home; About Us;
USA Production of dicalcium phosphate Google Patents Production of dicalcium phosphate Download PDF Info Publication number USA. USA US67290A USA USA US A US A US A US 67290 A US67290 A US 67290A US A US A US A US A US A US A Authority US United States Prior art keywords solution phosphate
The invention relates to a combined process for the manufacture of feed grade dicalcium phosphate and pure phosphoric acid. The process comprises the reaction of an excess of phosphate rock with aqueous solutions of a mineral acid selected from hydrochloric acid, phosphoric acid and nitric acid, characterized by the fact that the free acidity of the dissolution liquor does not exceed 60% and
patent of dicalcium phosphate from rock phosphate. Processes for the manufacture of feedgrade dicalcium . Oct 26 1976 The combined process of DCP manufacture and phosphoric acid production minimizes any losses of P 2 O 5 normally encountered in the attack on rock phosphate by a mineral acid in the DCP manufacture since according to the present invention the reaction system for the
Dicalcium phosphate known, as DCP is a commonly used animal feed supplement and it is desirable to obtain dicalcium phosphate free of contaminants, particularly fluoride containing compounds. Feed grade dicalcium phosphate has a chemical formula C PO4 2H2O wherein phosphorus expressed as P is 18% and calcium expressed as Ca is at least 23%. Maximum fluorine content is %.
Dicalcium Phosphate Patents anreximin patent of dicalcium phosphate from rock phosphate Patents on Phosphate processingbone and But acid treatment of rock phosphate Get Information; phosphate rock dicalcium Dicalcium phosphate Wikipedia Dicalcium phosphate is the calcium phosphate with the formula CPO4 and its dihydrate
Patent Of Dicalcium Phosphate From Rock Phosphate. GB782177A Dicalcium phosphate Google Patents. Fluoride is removed in the preparation of dicalcium phosphate from wet process phosphoric acid by neutralizing the acid with an alkaline compound of calcium, lime or calcium carbonate,
Us Patent For Manufacturing Process Of . USA Process for the manufacture of dicalcium references cited in the file of this patent united states patents . claims (1) 1. process for the production of a granular, animal feed grade, dicalcium phosphate product which comprises forming a slurry having a solids content between about 50% and about 70% by weight of comminuted calcium carbonate
Dicalcium phosphate shows the most commonly used production method is known as the wet acid route in which rock phosphate is reacted with sulphuric acid to produce phosphoric acid. After concentration and purification to reduce the level of undesirable elements, this phosphoric acid is
US Patent # 4 141 958 Process for producing phosphoric . This invention relates to a process for producing phosphoric acid and dicalcium phosphate More particularly the invention provides a process for obtaining relatively pure phosphoric acid and/or impure fertilizer grade dicalcium phosphate from low grade phosphatic raw materials as well as from high grade phosphate rock 2
It also relates to methods for the manufacture of monocalcium phosphate fertilizer, edible monocalcium phosphate and edible dicalcium phosphates. BACKGROUND OF THE INVENTION. Tricalcium orthophosphate, Ca3(PO4)2, commonly known as calcium phosphate, occurs in nature as rock phosphate ore, for example and is used as such as a source of fertilizer.
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This invention relates to the preparation of feed grade dicalcium phosphate from a source containing monocalcium phosphate such as super phosphate, concentrated super phosphate and the like. The first step consists of leaching water soluble mono calcium phosphate therefrom with water or recycle wash water from one of the subsequent steps.
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 source material. Calcium fluoride is precipitated at a pH of between and followed by hydrolyzing the solution by diluting it with water to a ratio of
Feed grade dicalcium phosphate has a chemical formula C PO4 2H2O wherein phosphorus expressed as P is 18% and calcium expressed as Ca is at least 23%. Maximum fluorine content is %. Rock phosphates and bone ash are natural sources of calcium phosphate in the form of tricalcium phosphate of the chemical formula Ca3 (PO^. Acidification of
DicalciumPhosphates Process, Technology, Applications, Patent Dicalcium phosphate, also known as calcium monohydrogen phosphate, is a which rock phosphate is reacted with sulphuric acid to produce phosphoric acid.
In my previous patent, No. 2,360,197, issued October 10, 1944, I have disclosed various processes for manufacturing defluorinated phosphate, including a process for calcining triple superphosphate. Triple superphosphate is made by treating each ton of Florida rock with about two tons of commercial or fertilizer grade phosphoric acid (H3PO4) of about 60* Baum6 strength, containing about %
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