patent of dicalcium phosphate from rock phosphate

patent of dicalcium phosphate from rock phosphate

US2882127A - Granular dicalcium phosphate product and method .GB391495A * 1930-10-31 1933-05-01 Du Pont Improvements in or relating to the production of mono-calcuim phosphate and di-calcium phosphate. US2013970A * 1933-02-10 1935-09-10 U S Phosphoric Products Corp Process of producing phosphoric acid and derivatives of the same.Di-calcium phosphate by direct acidulation of phosphate rockphosphate rock with sulfuric acid or phosphoric acid. The acidulation process converts the highly insoluble phosphate in mineral apatite into forms which are available to plants, such as mono-calcium phosphate an£^ di-calcium phosphate CaHPO^. "When phosphate rock is treated with sufficient acid, mono-calcium.

US2043238A - Manufacture of di-calcium phosphate - Google PatentsSome of the reactions involved in the manufacture of di-calcium phosphate by steps within the scope of this invention are presented; using calcium carbonate and phosphoric acid: 2CaI-IPO4.2H2O+CO2 using phosphate rock, phosphoric acid and calcium carbonate: Caz (P04) 2+4H3PO4+ 3H2O=3CaH4 (P04) 2.H2O.US2882127A - Granular dicalcium phosphate product and method .GB391495A * 1930-10-31 1933-05-01 Du Pont Improvements in or relating to the production of mono-calcuim phosphate and di-calcium phosphate. US2013970A * 1933-02-10 1935-09-10 U S Phosphoric Products Corp Process of producing phosphoric acid and derivatives of the same.

22 Comments

Process for producing phosphoric acid and dicalcium phosphate

US3118731A * 1959-10-28 1964-01-21 Svanoe. US3150957A * 1961-06-07 1964-09-29 Armour & Co Treatment of phosphate rock. GB1089682A * 1964-07-24 1967-11-01 Fisons Ltd Dicalcium phosphate. US3410656A * 1966-06-01 1968-11-12 Fmc Corp Phosphoric acid purification.

patent of dicalcium phosphate from rock phosphate,Processes for the manufacture of feed-grade dicalcium phosphate .

Oct 26, 1976 . Processes for the manufacture of feed-grade dicalcium phosphate and phosphoric acid. United States Patent 3988420. Abstract: 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.

EP1115654B1 - Production of calcium . - Google Patents

It can also be converted with sulphuric acid to a mixture of calcium sulphate and phosphoric acid, or calcium dihydrogen phosphate, Ca(H 2PO 4) 2, the latter also being known as monocalcium phosphate. Calcium phosphate has a relatively low phosphorous content (20% m:m) while monocalcium phosphate, while having.

Di-calcium phosphate by direct acidulation of phosphate rock

phosphate rock with sulfuric acid or phosphoric acid. The acidulation process converts the highly insoluble phosphate in mineral apatite into forms which are available to plants, such as mono-calcium phosphate an£^ di-calcium phosphate CaHPO^. "When phosphate rock is treated with sufficient acid, mono-calcium.

Patents on Phosphate processing - bone and rock phosphate .

While some people soon made their luck in patenting processes to convert rock phosphate into soluble phosphates which are easier available to plants, others ... of such food grade monocalcium phosphate from crude phosphoric acid made by reacting phosphate rock with sulfuric acid has presented substantial difficulties.

CPC Definition - C05B PHOSPHATIC FERTILISERS

Superphosphates, i.e. fertilisers produced by reacting rock or bone phosphates with sulfuric or phosphoric acid in such amounts and concentrations as to yield solid products directly. Definition statement. This place covers: Fertilisers produced by reacting rock or bone phosphates with sulphuric or phosphoric acid in such.

Tricalcium phosphate | Ca3(PO4)2 - PubChem

Tricalcium phosphate | Ca3(PO4)2 or Ca3O8P2 | CID 24456 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and . Calcium Phosphate is the calcium salt of phosphoric acid with widely used applications.

Ecophos Technology Services

The unique, innovative and patented Ecophos process delivers an economic and ecological method for valorising both low and high grade phosphate sources as . The main intermediate of the Ecophos process is Di Calcium Phosphate Dihydrate (DCP) : a pure and concentrated form of phosphate, we call it “super rock”,.

Calipharm A (Dicalcium Phosphate, Anhydrous)

Dibasic Calcium Phosphate Anhydrous. Phosphoric acid, calcium salt (1:1). Calcium Phosphate, Anhydrous (1:1). Calcium Hydrogen Phosphate . recommendation for uses which infringe valid patents or as extending license under valid patents. E 341 (ii). This product complies with current European Union. Directive No.

Monocalcium phosphate production process - Patent Search

FIELD: industrial inorganic synthesis. SUBSTANCE: monocalcium phosphate, widely applied in agriculture, is prepared by mixing extraction phosphoric acid with calcium-containing component followed by granulation and drying of product. During mixing of components, appropriate temperature and moisture are.

Monocalcium phosphate production process - Patent Search

FIELD: industrial inorganic synthesis. SUBSTANCE: monocalcium phosphate, widely applied in agriculture, is prepared by mixing extraction phosphoric acid with calcium-containing component followed by granulation and drying of product. During mixing of components, appropriate temperature and moisture are.

Phosphorus Removal from Wastewater and Manure Through .

Aug 16, 2007 . phosphate removal, the process aims to produce calcium phosphate (hydroxylapatite) in a granular form using a fluidized-bed . remove phosphate from the secondary effluent of sewage treatment works using phosphate rock as seed material. The fixed bed column . Brushite or dicalcium phosphate.

calcium chloride - Agricultural Marketing Service - USDA

Feb 10, 2016 . Monocalcium phosphate is used as the single acidulant in some aluminum-free baking powder products. 183. Some baking .. Calcium phosphate, monobasic. Monobasic calcium phosphate is produced by treating calcium hydroxide with phosphoric acid. Calcium phosphate, dibasic. Dibasic calcium.

A Preparation of High Purity Phosphatic Salts from Purified .

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 rocks with aqueous solutions of a mineral acid selected from hydrochloric acid, phosphoric acid and nitric acid, characterized by the.

Modification of manufacturing process of feed phosphates - Chemik .

Produced from phosphate raw materials: apatites, phosphate rocks. • Produced from phosphoric acid solutions .. of phosphoric acid (or calcium hydrogen phosphate for the preparation of MCP monocalcium ... technical periodicals, 32 patents, 82 papers and posters presented at domestic and international conferences.

ChEmiCAl TEChNOlOGy - Trade Science Inc

crude phosphoric acid. The second step includes the precipitation of food grade dicalcium phosphate using calcium salt (calcium oxide, calcium hydroxide or cal- cium carbonate[22]). The production of calcium monohydrogenphosphate for animal fodders usage was the goal of fertilizer industries. The production of cal-.

PURIFIED PHOSPHORIC ACID PROCESSES A . - SMARTech

dissociate into dicalcium phosphate precipitate and phosphoric acid which remained soluble. A number of studies have been made in the past concerned with the extraction of phosphoric acid by organic solvents and the solubility of phosphoric acid in various organic liquids. A variety of patents exist for chemical processes.

Poultry feed availability and nutrition in developing countries

phosphates used in poultry diets are dicalcium phosphate, bone meal, rock phosphate, defluorinated phosphate and tricalcium phosphate, all of which supply both calcium and .. patented, does not imply that these have been endorsed or recommended by FAO in preference to others of a similar nature that are not.

Chemical reactions during the preparation of P and NPK fertilizers .

Dec 21, 2010 . Transformations of the mineral phases were observed when the P content of the products was adjusted by the addition of phosphoric acid (PA). The products of the reaction of SSA-Ca with PA were brushite (dicalcium phosphate dihydrate) and monocalcium phosphate monohydrate (MCPM). Further.

Tooth Remineralization -- Calcium Phosphate Remineralization .

Alternatively, an insoluble calcium phosphate source such as hydroxyapatite or dicalcium phosphate can be solubilized in clear solution by reducing the pH to about 2-4, typically about 2.8-3.8 with acids such as phosphoric acid, hydrochloric acid and the like. After the antinucleating.

Fuji_Email Blast_Fujicalin_SEP29.2010dd - Neusilin

Introduction. Since the late. 1950s and early. 60's, conventional calcium hydrogen phosphate has been widely used as the excipient for direct compression tabletting. However, the first generation of calcium phosphates were hard and rough pillar-like crystals with crystal water, which often caused abrasiveness of punches.

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