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US4113842A Preparation of dicalcium phosphate from

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 α-hydroxysulfonate. Carbonyl and part of the sulfur dioxide are recovered from the solid by low temperature thermal decomposition.

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US Patent for Preparation of dicalcium phosphate from

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.

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US2728635A Production of feed grade dicalcium phosphate

phosphate hydrolysis solution dicalcium phosphate rock Prior art date 1951-07-16 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 US236886A Inventor Miller Ralph

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US Patent for Production of dicalcium phosphate or

Aug 25, 1999· Justia Patents Orthophosphate (e.g., Calcium Hydroxyapatite) US Patent for Production of dicalcium phosphate or monocalcium phosphate from calcium phosphate Patent (Patent # 6,183,712) Production of dicalcium phosphate or monocalcium phosphate from calcium phosphate Aug 25, 1999

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US1235025A Process of making dicalcium phosphate

Di-calcium phosphate is usually prepared by the action of a sulfuric or phosphoric acid upon phosphate rock or other insoluble calcium phosphates, and also by the double decomposition of dibasic...

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US Patent for Preparation of dicalcium phosphate from

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.

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US Patent for Production of dicalcium phosphate or

Aug 25, 1999· 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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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 acid per mole of P 2 O 5 content of the rock and about 3%

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Preparation of dicalcium phosphate from phosphate rock by

Bridger (U.S. 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

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patent of dicalcium phosphate from rock phosphate

Dicalcium phosphate Dicalcium phosphate is the calcium phosphate with the formula CaHPO 4 and its dihydrate. The quotdiquot prefix in the common name arises because the formation of the HPO 4patent of dicalcium phosphate from rock phosphate. Dapatkan Dukungan dicalcium phosphate patents. The dicalcium phosphate product is screened and dried

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Indian Patents. 202038:A PROCESS FOR THE MANUFACTURE OF

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 CaH PO4 2H2O wherein phosphorus expressed as P is 18% and calcium expressed as Ca is at least 23%.

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Method of producing dicalcium phosphate

The prototype of the claimed invention is a method of producing dicalcium phosphate /patent RF №2411222, publ. 10.02.2011, application No. 2009109920/includes mixing phosphoric acid with limestone at 60-80°C bereturned with subsequent maturation and drying of the product flue gases at 120-145°C. to a residual moisture content of 1.5-2.5%, characterized in that the mixture of lead in two

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Dicalcium-Phosphates- Process, Technology, Applications

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

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Phosphates Production,Technology, Applications, Patent

Phosphate rock production rose 1.5 percent to 168 million tonnes in 2005. The largest producer was China, while the US, Morocco and Former Soviet Union countries also achieved significant volumes. Patent . Phosphates; Production of dicalcium phosphate or monocalcium phosphate ; Process for phosphating metal; Phosphating Operation

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US Patent for Process for the production of high purity

Oct 16, 2008· 1. Attack of Phosphate Rock with Diluted HCl. Step 1 of the process, illustrated in FIG. 1, consists of an attack of phosphate rock with diluted HCl. For instance, phosphate rock with a P 2 O 5 content typically between 20 and 35% P 2 O 5 is introduced into a reactor (input I) together with an aqueous solution of HCl, diluted between 3 and 10%

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Reacting An Acid And Phosphate Rock Patents and Patent

Oct 16, 2008· Abstract: A process for producing high-analysis dicalcium phosphate containing phosphatic fertilizers and by-product calcium nitrate. It comprises reacting phosphate rock with nitric acid, followed by pyrolysis of the resulting acidulate to effect liberation of approximately one-half of the initially consumed nitric acid.

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Production of dicalcium phosphate or monocalcium phosphate

The invention claimed is: 1. A process for the production of dicalcium phosphate from a phosphate source material comprising the steps of: (a) preparing a solution of phosphoric acid by the action of a suitable mineral acid on a phosphate source material; (b) optionally separating the solution from residual solid materials; and (c) treating the solution with suitable alkaline, calcium material

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Paten Dicalcium Phosphate Fundusze Luksemburg

Dicalcium phosphate Dicalcium phosphate is the calcium phosphate with the formula CaHPO 4 and its dihydrate. The quotdiquot prefix in the common name arises because the formation of the HPO 4&patent of dicalcium phosphate from rock phosphate. Dapatkan Dukungan » dicalcium phosphate patents. The dicalcium phosphate product is screened and dried

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Di-calcium phosphate by direct acidulation of phosphate rock

phate and undecomposed phosphate rock is obtained instead of di-calcium phosphate. The purpose of this research was to find a method of produc­ ing di-calcium phosphate. Reaction 2 is very difficult to effect. Phosphate rock so treated always contains a high percentage of undecomposed rock, even after a relatively long time.

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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 acid per mole of P 2 O 5 content of the rock and about 3%

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Paten Dicalcium Phosphate Fundusze Luksemburg

Dicalcium phosphate Dicalcium phosphate is the calcium phosphate with the formula CaHPO 4 and its dihydrate. The quotdiquot prefix in the common name arises because the formation of the HPO 4&patent of dicalcium phosphate from rock phosphate. Dapatkan Dukungan » dicalcium phosphate patents. The dicalcium phosphate product is screened and dried

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Production of dicalcium phosphate or monocalcium phosphate

The invention claimed is: 1. A process for the production of dicalcium phosphate from a phosphate source material comprising the steps of: (a) preparing a solution of phosphoric acid by the action of a suitable mineral acid on a phosphate source material; (b) optionally separating the solution from residual solid materials; and (c) treating the solution with suitable alkaline, calcium material

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Method of producing dicalcium phosphate

The prototype of the claimed invention is a method of producing dicalcium phosphate /patent RF №2411222, publ. 10.02.2011, application No. 2009109920/includes mixing phosphoric acid with limestone at 60-80°C bereturned with subsequent maturation and drying of the product flue gases at 120-145°C. to a residual moisture content of 1.5-2.5%, characterized in that the mixture of lead in two

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Processes for the manufacture of feed-grade 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

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Production of dicalcium phosphate or monocalcium phosphate

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, Ca 3 (PO 4) 2, commonly known as calcium phosphate, occurs in nature as rock phosphate ore, for example and is used as such as a source of

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Acid Treatment Patents and Patent Applications (Class 423

Aug 13, 2013· Justia Patents Chemistry Of Inorganic Compounds Patents Treating Mixture To Obtain Metal Containing Compound Patents Alkaline Earth Metal (mg, Ca, Sr, Or Ba) Patents Phosphate Rock Or Ore Patents Acid Treatment Patents (Class 423/157.3)

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Di-calcium phosphate by direct acidulation of phosphate rock

phate and undecomposed phosphate rock is obtained instead of di-calcium phosphate. The purpose of this research was to find a method of produc­ ing di-calcium phosphate. Reaction 2 is very difficult to effect. Phosphate rock so treated always contains a high percentage of undecomposed rock, even after a relatively long time.

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Recovery and separation of phosphorus as dicalcium

Phosphorus supplements are usually produced from high-grade phosphate rock concentrates (28–40 wt% P 2 O 5). 1 The sources for this phosphate rock are either sedimentary phosphorites (29–35 wt% P 2 O 5) or igneous apatites (∼27 wt% P 2 O 5), with the phosphorus occurring as apatite minerals (Ca 5 (PO 4) 3 (F, OH, Cl)). 2 The phosphate

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Phosphates it's all in the chemistry All About Feed

Dec 01, 2003· At Tessenderlo's phosphate plant in Ham, in northern Belgium, phosphate rock is turned into a very pure dihydrated crystalline dicalcium phosphate. This isn't the only method the group uses to make feed phosphates. Intimate knowledge of all available phosphates, claim the company's experts, is the secret to good phosphorus nutrition for all species of livestock.

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patent of dicalcium phosphate from rock phosphate Stone

Aug 22, 2019· patent of dicalcium phosphate from rock phosphate manufacturing process of dicalcium phosphate with The experiment was carried out with 120, day old Hubbard broiler chicks maintained on floor pens. The present experiment was conducted to evaluate the bioavailability of the phosphorus in Get Price dicalcium phosphate dihydrate, 7789-77-7

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Dicalcium Phosphate From Rock Phosphate

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 0.02 g per 100 mL at 25 °C.

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(PDF) SYNTHESIS OF DICALCIUM PHOSPHATE USED AS FEED

The brushite solubility was determined in the pH range 4.5-8.0 at 25°C, 30°C and 35°C6. Wet acid digestion of the phosphate rock with sulphuric acid and hydrochloric acid is commonly used for dicalcium phosphate production both acids used also lead to the enhancement of several radionuclides within the final product7,8.

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Effect of Particle Size on Availability and Mobility of

One-third of the phosphorus of the dicalcium and 40-mesh tricalcium phosphates, 1/8 of the phosphorus of the 10-mesh tricalcium phosphate, and less than 1/100 of the phosphorus of rock phosphate was found in the leachates. Growth of corn in limed Tifton fine sand was significantly better for the 40-mesh than for the 10-mesh tricalcium phosphates.