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Process For The Preparation Of Dicalcium Phosphate

Process For The Preparation Of Dicalcium Phosphate

US5024825A - Process for the preparation of dicalcium ...

For the preparation of dicalcium phosphate dihydrate stabilized with dimagnesium phosphate trihydrate and sodium pyrophosphate, an aqueous suspension of calcium carbonate is introduced into a reactor and recirculated by pumping through a high-speed mixer at 3,500 to 8,000 rpm which is in flow connection with the lower and upper portion of the reactor.

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Process for the preparation of dicalcium phosphate ...

1990-5-10 · The present invention relates to a process for the preparation of dicalcium phosphate dihydrate stabilized with dimagnesium phosphate trihydrate and sodium pyrophosphate, in which an aqueous suspension of calcium carbonate is introduced into a reactor equipped with a stirrer and recirculated by pumping at more than 3,000 rpm through a high-speed mixer which is in flow

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Process for the preparation of dicalcium phosphate ...

1994-2-4 · In the process for the preparation of dicalcium phosphate dihydrate having good fluoride compatibility and hydrolytic stability, which effects further thickening which is as low as possible when it is used in toothpastes, by reaction of calcium carbonate suspended in water with an aqueous solution of orthophosphoric acid, precipitation of dimagnesium phosphate trihydrate as stabiliser by ...

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Process for the preparation of a dicalcium phosphate ...

1994-1-19 · In the process for preparing dicalcium phosphate dihydrate having a good fluoride compatibility and stability to hydrolysis, which when used in toothpaste effects an as small as possible further thickening, by reaction of calcium carbonate suspended in water with an aqueous solution of orthophosphoric acid, precipitation onto this of dimagnesium phosphate trihydrate as stabiliser by

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Process for the preparation of coarse-particle dicalcium ...

A process for the preparation of coarse-particle dicalcium phosphate dihydrate having a virtually spherical crystal shape and a particle size range between about 63 and 450 μm, preferably between about 90 and 300 μm, by reacting pure aqueous phosphoric acid with aqueous suspensions of precipitated chalks, wherein an amount of suspension corresponding to the reaction product formed is removed ...

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EP0445593A1 - Process for the preparation de dicalcium ...

The present invention relates to a process for producing granulated dicalcium phosphate dihydrate from fine-grained, powdery dicalcium phosphate dihydrate, wherein 80-95% dicalcium phosphate dihydrate with a grain size of less than 120 μm and 20-5% calcium hydroxide with a grain size of less than 120 μm are dry mixed and in a fluidized bed , based on the amount of solids, 20-50% of water ...

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Dicalcium-Phosphates- Process, Technology, Applications ...

2008-11-7 · 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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Preparation of anhydrous dicalcium phosphate, DCPA ...

2008-8-15 · Anhydrous dicalcium phosphate, CaHPO 4, DCPA, as a member of the series of calcium phosphates, has considerable biological importance to the biomineralization processes in bones and teeth, and has found practical applications in dental cements and restorative materials.This compound, can reconstruct hard tissues because of high solubility in vivo in comparison with many of the other

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manufacturing process of dicalcium phosphate pdf « BINQ

2013-6-26 · A PROCESS FOR THE MANUFACTURE OF FEED GRADE . 10 Sep 2004 View/Download PDF PDF Help. Claims: CLAIMS : 1. A process for the preparation of feed grade dicalcium phosphate The first step in this process is in the production of single super phosphate generally known as SSP, »More detailed

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Clean process for the production of defluorinated ...

1994-4-1 · A new process for the production of defluorinated dicalcium phosphate using phosphate rock was developed. This new process has the main characteristic of being clean, without the production of any liquid waste. The process has essentially three main steps: phosphate rock digestion, defluorination and neutralization.

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Process for the preparation of a dicalcium phosphate ...

1994-1-19 · In the process for preparing dicalcium phosphate dihydrate having a good fluoride compatibility and stability to hydrolysis, which when used in toothpaste effects an as small as possible further thickening, by reaction of calcium carbonate suspended in water with an aqueous solution of orthophosphoric acid, precipitation onto this of dimagnesium phosphate trihydrate as stabiliser by

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Process for the preparation of a dicalcium phosphate ...

In the process for the preparation of dicalcium phosphate dihydrate, which has a good compatibility with fluorine and stability to hydrolysis and causes the minimum possible after-thickening when used in tooth-pastes, by reaction of calcium carbonate suspended in water with an aqueous solution of orthophosphoric acid, precipitation of dimagnesium phosphate trihydrate, as a stabilizer, by ...

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US4177052A - Process for preparing dicalcium phosphate ...

There is disclosed a process for preparing fertilizers containing dicalcium phosphate from phosphates of mineral origin by mechanical activation. According to the invention grains larger than 5 mm of the sized or unsized starting phosphate compound of mineral origin are granulated up to a grain size of 1 to 4 mm, the granulated phosphate obtained is admixed with monocalcium phosphate and the ...

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Dicalcium-Phosphates- Process, Technology, Applications ...

2008-11-7 · 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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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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PROCESS FOR THE PREPARATION OF CALCIUM

2007-1-8 · The objective of the present innovation is a new process for the preparation ofcalcium phosphate granules of the hydroxyapatite type. The preparation processof a business for the said granules based on the invention is a hydrolysis processof a brushite dicalcium phosphate, in a basic milieu which is characterised bythe fact that an aqueous suspention of brushite dicalcium phosphate is ...

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Process for the preparation of calcium phosphate granules ...

The preparation process of a business for the said granules based on the invention is a hydrolysis process of a brushite dicalcium phosphate, in a basic milieu which is characterised by the fact that an aqueous suspention of brushite dicalcium phosphate is treated with lime, in the presence of an effective quantity of a carboxylic acid.

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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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PROCESS FOR THE PREPARATION OF CALCIUM

2007-1-8 · The objective of the present innovation is a new process for the preparation ofcalcium phosphate granules of the hydroxyapatite type. The preparation processof a business for the said granules based on the invention is a hydrolysis processof a brushite dicalcium phosphate, in a basic milieu which is characterised bythe fact that an aqueous suspention of brushite dicalcium phosphate is ...

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Clean process for the production of defluorinated ...

A new process for the production of defluorinated dicalcium phosphate using phosphate rock was developed. This new process has the main characteristic of being clean, without the production of any liquid waste. The process has essentially three main steps:

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Process for the preparation of a dicalcium phosphate ...

1994-1-19 · In the process for preparing dicalcium phosphate dihydrate having a good fluoride compatibility and stability to hydrolysis, which when used in toothpaste effects an as small as possible further thickening, by reaction of calcium carbonate suspended in water with an aqueous solution of orthophosphoric acid, precipitation onto this of dimagnesium phosphate trihydrate as stabiliser by

Read More
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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Preparation of feed grade dicalcium phosphate from ...

The wet-process is the process applied in Syria using phosphate mineral, and phosphoric acid produced by this process contains a variety of impurities. This paper studies the precipitation of Cd ...

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PROCESS FOR THE PREPARATION OF CALCIUM

2007-1-8 · The objective of the present innovation is a new process for the preparation ofcalcium phosphate granules of the hydroxyapatite type. The preparation processof a business for the said granules based on the invention is a hydrolysis processof a brushite dicalcium phosphate, in a basic milieu which is characterised bythe fact that an aqueous suspention of brushite dicalcium phosphate is ...

Read More
Clean process for the production of defluorinated ...

1994-4-1 · A new process for the production of defluorinated dicalcium phosphate using phosphate rock was developed. This new process has the main characteristic of being clean, without the production of any liquid waste. The process has essentially three main steps: phosphate rock digestion, defluorination and neutralization.

Read More
process dicalcium phosphate

2020-11-8 · dicalcium phosphate production process - TPP . Process for the production of dicalcium phosphate The process for producing dicalcium orthophosphate comprising heating monocalcium 30 chlorophosphate, substantially free of calcium chloride, in an atmosphere of steam, at a temperature below the decomposition point of dicalcium orthophosphate and above the vapor condensation point

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Dicalcium Phosphate - an overview | ScienceDirect Topics

Dicalcium phosphate is another material that is recognized by its name and in this case, different grades are identified by percentage references. The conveying characteristics for the 48% grade of the material conveyed through the Fig. 11.2 pipeline were presented in Fig. 11.13b.They are repeated here in Fig. 13.24a for reference.

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Effect of processing conditions of dicalcium phosphate ...

Dicalcium phosphate cements (brushite and monetite) are resorbable biomaterials with osteoconductive potential for bone repair and regeneration that have yet to gain widespread commercial use. Brushite can be converted to monetite by heat treatments additionally resulting in various changes in the physico-chemical properties.

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The Production of Calcium Phosphate from Natural Raw ...

2009-5-26 · Abstract. The graphic investigation of basic equilibrium systems CaO-P 2 O 5-H 2 0, CaO-P 2 OH 2 0-HA (HA: HCl, HNO 3, H 2 SO 4) was carried out.The conditions of the preparation of mono-, dicalcium phosphate and mixtures by crystallization and

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Preparation and properties of tetracalcium phosphate ...

2013-6-1 · Preparation of anhydrous dicalcium phosphate, DCPA, through sol–gel process, identification and phase transformation evaluation J Non-Crystall Solids , 354 ( 2008 ) , pp. 3854 - 3857 Article Download PDF View Record in Scopus Google Scholar

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