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us patent for manufacturing process of dicalcium phosphate

Process for the manufacture of dicalcium phosphate - Google

US2948590A - Process for the manufacture of dicalcium phosphate - Google Patents Process for the manufacture of dicalcium phosphate Classifications C01B25/322 Preparation by neutralisation...

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US1235025A - Process of making dicalcium phosphate. - Google

US1235025A - Process of making dicalcium phosphate. - Google Patents Process of making dicalcium phosphate. Classifications C01F5/30 Chlorides US1235025A United

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US Patent for Production of dicalcium phosphate or

A process is provided for the production of dicalcium phosphate form a phosphate source material in which a solution of phosphoric acid is produced by the action of a

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US Patent for Process for the production of dicalcium phosphate

A process for the recovery of phosphate values from a phosphate ore, wherein the ore is leached with a mixture comprising water, sulphur dioxide and an organic carbonyl

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United States Patent (19) 11 Patent Number: 5,024,825 Jun.

through which highly adsorbent dicalcium phosphate dihydrate can be removed. The process according to the invention gives a stabi lized dicalcium phosphate dihydrate

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United States Patent Office 3,391,992

United States Patent Office 3,391,992 Patented July 9, 1968 3,391,992 ... production of edible phosphate salts. It is accordingly an object of this invention to provide ... method

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Production of dicalcium phosphate by treatment of phosphate

This paper presents results laboratory experiments to test a new process for manufacture of dicalcium phosphate. The process is based on the nitric acidulation of phosphate

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Production of dicalcium phosphate or monocalcium phosphate

Production of dicalcium phosphate or monocalcium phosphate from calcium phosphate United States Patent 6183712 Abstract: A method of producing dicalcium phosphate

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Production of defluorinated dicalcium phosphate from

A new process to produce defluorinated dicalcium phosphate (DCP) using phosphate rock concentrate has been developed. This new process has as main characteristic the

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US Patent for Production of dicalcium phosphate or

A process is provided for the production of dicalcium phosphate form a phosphate source material in which a solution of phosphoric acid is produced by the action of a suitable mineral acid, generally sulphuric acid, on a phosphate source material. Calcium fluoride is precipitated at a pH of between 3.5 and 4.5 followed by hydrolyzing the solution by

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US Patent for Production of dicalcium phosphate or

1999年8月25日  US Patent for Production of dicalcium phosphate or monocalcium phosphate from calcium phosphate Patent (Patent # 6,183,712 issued February 6, 2001) - Justia Patents Search Production of dicalcium phosphate or monocalcium phosphate from calcium phosphate Aug 25, 1999

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UNITED STATES PATENT OFFICE.

PROCESS OF MAKING DICALCIUM PBIOSPBATE, 1,235,025. No Drawing. To all whom it may concern Be it known that I, WALTER GLAESER, a subject of the German Emperor, and a resi dent of Brooklyn, county of Kings, and State of New York, have invented a new and useful Improvement in Processes of Making Dicalcium Phosphate, (Case A)

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United States Patent Office 3,391,992

United States Patent Office 3,391,992 Patented July 9, 1968 3,391,992 ... production of edible phosphate salts. It is accordingly an object of this invention to provide ... method for producing feed-grade dicalcium phosphate from wet-process phosphoric acid. The method provides

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Production of dicalcium phosphate or monocalcium phosphate from

Production of dicalcium phosphate or monocalcium phosphate from calcium phosphate United States Patent 6183712 Abstract: 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.

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Process for the production of granulated dicalcium phosphate dihydrate ...

In U.S. Pat. No. 3,467,495, a process is disclosed for producing granulated calcium phosphates, also including dicalcium phosphate, by carrying out the reaction of phosphoric acid with calcium carbonate or calcium hydroxide in a kneader, using a 2.5 to 10 fold amount of a finely-divided calcium phosphate as crystallization nuclei and reaction bed.

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US3415629A - Apparatus for the production of phosphoric acid

US3415629A US522249A US52224966A US3415629A US 3415629 A US3415629 A US 3415629A US 522249 A US522249 A US 522249A US 52224966 A US52224966 A US 52224966A US 3415629 A US3415629 A US 3415629A Authority US United States Prior art keywords tank reactor rock reaction partial Prior art date 1966-01-21 Legal status

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Recovery and separation of phosphorus as dicalcium

The process produces three solid products: (1) high-grade dicalcium phosphate dihydrate (main product), (2) gypsum, which can be used for manufacturing of wallboards, cement, and plaster of paris, or for soil

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Recovery and separation of phosphorus as dicalcium

The developed process achieves around 70% phosphorus recovery as an industrial-grade (19 wt% P) dicalcium phosphate dihydrate product with minimal iron, magnesium, and aluminum contamination, while also

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Production of dicalcium phosphate by treatment of phosphate

This paper presents results laboratory experiments to test a new process for manufacture of dicalcium phosphate. The process is based on the nitric acidulation of phosphate rock concentrate, followed by neutralization of the extract liquor with calcium carbonate. The precipitated dicalcium phosphate is then separated from calcium nitrate solution by

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Di-calcium phosphate by direct acidulation of phosphate rock

ABOUT US; BLOG; CONTACT US; FAQ; AFFILIATED LIBRARY UNITS; STATISTICS; Home; Student Research; Theses and Dissertations; Di-calcium phosphate by direct acidulation of phosphate rock Di-calcium phosphate by direct acidulation of phosphate rock. Download File. r_5905666.pdf (2.08 MB) Date. 1959. Authors.

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Production of defluorinated dicalcium phosphate from phosphate

A new process to produce defluorinated dicalcium phosphate (DCP) using phosphate rock concentrate has been developed. This new process has as main characteristic the low concentration of P2O5 in the liquid phase. The process comprises three main steps: solubilization of the phosphate rock concentrate with sulfuric acid, defluorination of the

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Updated opinion and report on the safety of di- and

I.2.1. THE PRODUCTION OF DICALCIUM PHOSPHATE (SEE ANNEX). Di-calcium phosphate is a co-product from the gelatine manufacture. A sample typical production process description is given in the figure in annex (after GME, 2000 and EMFEMA, 2002). The typical dicalcium phosphate manufacturing process includes first a

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(PDF) The future of dicalcium phosphate - ResearchGate

2011年1月1日  The production of phosphoric acid by sulfuric acid process is at present facing the problem of ... [Show full abstract] disposal of gypsum; about 1.5 tons of gypsum is produced per ton of rock ...

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US Patent for Production of dicalcium phosphate or

A process is provided for the production of dicalcium phosphate form a phosphate source material in which a solution of phosphoric acid is produced by the action of a suitable mineral acid, generally sulphuric acid, on a phosphate source material. Calcium fluoride is precipitated at a pH of between 3.5 and 4.5 followed by hydrolyzing the solution by

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UNITED STATES PATENT OFFICE.

In a method of making di-calcium phosphate, the steps. which consist in treat ing phosphate rock with hydrochloric acid under heat, cooling the mixture to about 30° C., treating the liquid product with calcium hydroxid to secure amorphous di-calcium phosphate, Soluble in ammonium citrate and 1,285,025

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US Patent for Process for the preparation of a dicalcium phosphate ...

1994年2月17日  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,

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Recovery and separation of phosphorus as dicalcium

The process produces three solid products: (1) high-grade dicalcium phosphate dihydrate (main product), (2) gypsum, which can be used for manufacturing of wallboards, cement, and plaster of paris, or for soil

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MANUFACTURE OF DICALCIUM PHOSPHATE, DIHYDRATE

United States Patent Office 3,294,486 Patented Dec. 27, 1966 3,294,486 MANUFACTURE OF DACACUM PHOSPHATE, DEHYDRAE Joseph Crenner, Hermuheim, near Cologne, and Heinz Harshisch, Loyenich, near Cologiae, Germany, assigors to Knapsack Aktiegesellschaft, a corporation of Ger naily

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

Dicalcium-Phosphates- Process, Technology, Applications, Patent, Products, Consultants, Company Profiles, Reports we provide information such as Process, Technology, Applications, Patent, Products, Consultants, Company Profiles, Reports about Dicalcium-Phosphate Dicalcium Phosphate

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Di-calcium phosphate by direct acidulation of phosphate rock

Di-calcium phosphate by direct acidulation of phosphate rock We collect and process your personal information for the following purposes: Authentication, Preferences, Acknowledgement and Statistics. To learn more, please read our privacy policy. Customize ... Decline That's ok

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US3415629A - Apparatus for the production of phosphoric acid

US3415629A US522249A US52224966A US3415629A US 3415629 A US3415629 A US 3415629A US 522249 A US522249 A US 522249A US 52224966 A US52224966 A US 52224966A US 3415629 A US3415629 A US 3415629A Authority US United States Prior art keywords tank reactor rock reaction partial Prior art date 1966-01-21 Legal status

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Production of dicalcium phosphate by treatment of phosphate

This paper presents results laboratory experiments to test a new process for manufacture of dicalcium phosphate. The process is based on the nitric acidulation of phosphate rock concentrate, followed by neutralization of the extract liquor with calcium carbonate. The precipitated dicalcium phosphate is then separated from calcium nitrate solution by

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Process of making monocalcium phosphate - SOUTHERN

Process of making monocalcium phosphate United States Patent 2012436 Abstract: The present invention relates to the making of monocalcium phosphate, and more particularly to the process hereinafter described which results in the quick and economical production of a high grade monocalcium phosphate.

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Production of Dicalcium Phosphate or Monocalcium Phosphate

Production of Dicalcium Phosphate or Monocalcium Phosphate: A process is provided for the production of dicalcium phosphate form a phosphate sourc. ... United States Patent Classification 071/041000000 423/157300000 423/157400000 423/158000000 423/308000000 423/309000000

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Processes for the manufacture of feed-grade dicalcium phosphate

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

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Production of defluorinated dicalcium phosphate from phosphate

Abstract A new process to produce defluorinated dicalcium phosphate (DCP) using phosphate rock concentrate has been developed. This new process has as main characteristic the low concentration of P 2 O 5 in the liquid phase.

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Updated opinion and report on the safety of di- and

I.2.1. THE PRODUCTION OF DICALCIUM PHOSPHATE (SEE ANNEX). Di-calcium phosphate is a co-product from the gelatine manufacture. A sample typical production process description is given in the figure in annex (after GME, 2000 and EMFEMA, 2002). The typical dicalcium phosphate manufacturing process includes first a

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