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Bridger ( Letters Patent No. 3,011,888) shows that dicalcium phosphate may be prepared, without the use of excess acid, by treating phosphate rock with water and phosphoric acid, curing the product (principally monocalcium phosphate and phosphate rock) at room temperature for several days, mixing it with more water and hydrolyzing the monocalcium phosphate to dicalcium phosphate and
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.
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
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 manufacturing process of dicalcium phosphate pdf #171; BINQ MiningProcesses for the manufacture of feedgrade dicalcium
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 2017 Edition hkhs code 8digit c62 unit live horses, for racing live horses, other than those for purebred breeding or racing
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
A process is described for highly efficient recovery of phosphate values from a wide range of phosphate rock including low grade phosphate rock material by leaching with a dilute sulfuric acid and precipitating phosphate values as dicalcium phosphate. Water savings are accomplished in the process by the use of sea water instead of fresh water.
Dicalcium Phosphate From Rock Phosphate Dicalcium phosphate, also known as calcium monohydrogen phosphate, is a dibasic calcium phosphate. Dicalcium phosphate is usually found as the dihydrate, but it can be thermally converted to the anhydrous form. It is practically insoluble in water, with a solubility of g per 100 mL at 25 #176;C.
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
Processes 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 PDF help. US Patent, Process for the manufacture of dicalcium phosphate, May, 1962, Strauchen et al. #187;More detailed
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.
Dicalcium phosphate Dicalcium phosphate is the calcium phosphate with the formula CPO 4 and its dihydrate. The quotdiquot prefix in the common name arises because the formation of the HPO 4amp;patent of dicalcium phosphate from rock phosphate. Dapatkan Dukungan #187; dicalcium phosphate patents. The dicalcium phosphate product is screened and dried
A process of producing dicalcium phosphate which comprises digesting phosphate rock with sulphuric acid of 25% to 40% strength, the acid employed being 1% to 5% in excess of the amount calculated to liberate the P2Os content of the rock as H3P04, filtering the resulting solution of45 phosphoric and sulphuric acids, adding to the solution ground phosphate rock in an amount sufficient to react
dicalcium phosphate patents. Apr 04 2001 #183; This invention relates to the production of dicalcium phosphate C 2 PO 4 2 or monocalcium phosphate CPO 4 from a source of phosphate generally a phosphate ore and typically one containing a significant amount of fluoride More particularly the invention relates to process in which a high recovery of phosphate can be achieved whilst fluoride
SYNTHESIS OF DICALCIUM PHOSPHATE USED AS FEED ADDITIVE FOR ANIMALS FROM PHOSPHATE ROCK AS POTENTIAL COSTEFFECTIVE RAW MATERIAL
calcium phosphate phosphate phosphoric acid calcium mono Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired Lifetime Application number US733475A Inventor Harry A Curtis
Monocalcium phosphate at first acts as a catalyst of the transformation of raw phosphate into dicalciumphosphate and then is built into the dicalcium phosphate formed. A single collision is able to ensure the energy necessary to the chemical reaction; however, in the equipments used for the purpose of this invention grains advantageously collide several times.
Dicalcium phosphate is the calcium phosphate with the formula CPO 4 and its dihydrate. The quot;diquot; prefix in the common name arises because the formation of the HPO 4 2 anion involves the removal of two protons from phosphoric acid, H 3 PO is also known as dibasic calcium phosphate or calcium monohydrogen phosphate is used as a food additive, it is found in some
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