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THE PROCESS. The first module is Module 1A where the phosphate rock is selectively digested in diluted hydrochloric acid (HCl). This reaction produces a slurry of undigested phosphate rock as a solid with phosphate and calcium chloride (CaCl 2) in solution.In Module 1B, the phosphate solution is treated with CaCO 3 to obtain dicalcium phosphate dihydrate (CaHPO 4.2H 2 O, DCP) crystals and
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US1235025A US9460216A US9460216A US1235025A US 1235025 A US1235025 A US 1235025A US 9460216 A US9460216 A US 9460216A US 9460216 A US9460216 A US 9460216A US 1235025 A US1235025 A US 1235025A Authority US United States Prior art keywords calcium phosphate making dicalcium phosphate mixture Prior art date 1916-05-01 Legal status (The legal status is an
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Production of dicalcium phosphate or monocalcium phosphate from calcium phosphate ... The method of claim 1 in which the mineral acid used in step (a) comprises hydrochloric acid, so that calcium chloride is the salt which is formed. ... In this process, the acetic acid used in reaction (6) dissolves the MCP without dissolving the contaminating
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Dec 01, 2003 After a counter current purification process, the dihydrated dicalcium phosphate crystals are precipitated, separated, filtered and dried. The crystalline structure is unique to the HCl production process. The dicalcium phosphates is further used for the production of monocalcium phosphate at the factory in Ham
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mono-calcium phosphate and undecomposed phosphate rock result in practice. Acidulation to di-calcium phosphate is of considerable interest since less sulfuric acid would be required, thereby lowering production costs. In addition, di-calcium phosphate has many desirable properties as a source of plant food
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US2108940A US723807A US72380734A US2108940A US 2108940 A US2108940 A US 2108940A US 723807 A US723807 A US 723807A US 72380734 A US72380734 A US 72380734A US 2108940 A US2108940 A US 2108940A Authority US United States Prior art keywords approximately limestone water calcium phosphoric acid Prior art date 1934-05-03 Legal status (The legal status is an
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In addition, HCl process has significant application in feed-grade dicalcium phosphate production ( Fig. 27(Process B)) [208,209]. ... Wang et al. [216] achieved 70-79% of total recovery and 94%
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Dicalcium phosphate crystals are precipitated and after filtration and drying the resulting product is a very pure crystalline dihydrate dicalcium phosphate that is sold as Aliphos Dical. Dicalcium phosphate is obtained from degreased bones which are demineralised by hydrochloric acid treatment and precipitated by a saturated lime solution
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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
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Jun 26, 2013 Production of Dicalcium Phosphate and its use – EAN-NORM. Production of Dicalcium Phospate and its use as a food … Dicalcium Phosphate Ca(H. 2. PO. 4. ) … process via hydrochloric acid digestion of the phosphate rock. More detailed
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The most common production process used for obtaining dicalcium phosphate dihydrate is dissolving either rock phosphate or bones in hydrochloric acid, purification and precipitation in crystals. Under very precise and controlled process parameters dicalcium phosphate dihydrate can also be produced from purified feed grade phosphoric acid with
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manufacturing process of dicalcium phosphate from h2so4. manufacturing process of dicalcium phosphate from h2so4 DicalciumPhosphates Process, Technology, Appliions Dicalcium phosphate shows the most commonly used production method is known as the wet acid route in which rock phosphate is reacted with
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THE PROCESS. The first module is Module 1A where the phosphate rock is selectively digested in diluted hydrochloric acid (HCl). This reaction produces a slurry of undigested phosphate rock as a solid with phosphate and calcium chloride (CaCl 2) in solution. In Module 1B, the phosphate solution is treated with CaCO 3 to obtain dicalcium phosphate dihydrate (CaHPO 4 .2H 2 O, DCP) crystals and CaCl 2
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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
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ties (52). Di-calcium phosphate can be produced by neutralizing phos phoric acid with limestone or ammonia, but this process is of little interest since the cost of production is relatively high. Phosphate rock consists of the mineral apatite, usually fluor-apatite
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