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Phosphate rock is the primary raw material source for phosphate production, but unfortunately mineable phosphate rock is a limited nonrenewable resource that may only last an additional 100 years. Large amounts of phosphorus end up in manures and in urban waste, mainly in sewage sludge and slaughterhouse waste.
Process for reducing phosphate ore Abstract. A process for reducing phosphate ore includes beneficiating phosphate ore to reduce alumina impurities while allowing fluoride impurities to remain in the beneficiated ore, mixing beneficiated ore with solid carbonaceous material to form a porous bed of agglomerated feed and heating the porous bed in a rotarytype kiln to produce elemental ...
This invention relates to a process for producing phosphoric acid and dicalcium phosphate. More particularly, the invention provides a process for obtaining relatively pure phosphoric acid and/or impure fertilizergrade dicalcium phosphate from lowgrade phosphatic raw materials as well as from highgrade phosphate rock. 2.
This invention relates to the preparation of feed grade dicalcium phosphate from a source containing monocalcium phosphate such as super phosphate, concentrated super phosphate and the like. The first step consists of leaching water soluble mono calcium phosphate therefrom with water or recycle wash water from one of the subsequent steps.
The calcium phosphate, such as hydroxyapatite, dicalcium phosphate, and tricalcium phosphate, preferably dicalcium phosphate, is added to the reactor in an amount of about % to about 20%, preferably from about % to about 10%, and more preferably from about 1% to about 5% based on the weight of the sand used.
Full Text: This invention relates to a process for the manufacture of feed grade dicalcium phosphate. 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.
From sewage sludge ash to calcium phosphate fertilizers. ... Process for the production of dicalcium phosphate Fox . ... PHOSPHATE ORE IN THE A process for the recovery of phosphate rock from an aqueous Phosphate matrix beneficiation patent us beneficiation of phosphate Patent US Method for beneficiation of . Get Price And Support Online
Jul 26, 2016· process for making dicalcium phosphate from rock phosphate ... The production of dicalcium phosphate (DCP) is part of the phosphate industry, which has been recently included in .
A legacy of innovation and service Feed Products has a long history of personal service and superior feed products. Our decadeslong relationships with many customers started with Earl Fallin in 1945 when he founded the company with a patented process for producing dicalcium feed phosphate. Raised on a dairy farm and educated with a master''s degree.
Patent of dicalcium phosphate from rock phosphate YouTube. Aug 17, 2016 ... Patent US manufacturing process of dicalcium phosphate from rock. ... rock is acidulated for making dicalcium phosphate, and in US. ... Cake flour is usually a short patent flour of low ash and protein content. ... In the milling process, flour streams can be ...
Dicalcium phosphate is a crystalline feed grade Dicalcium phosphate containing % Minimum phosphorous and % Maximum calcium. The selected raw material of nonanimal origin and the production process ensures an end product with good phosphorous digestibility and a content of undesirable elements well below that stipulated by EU feed legislation.
phosphate monocalcium phosphate Prior art date 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 US13957A Inventor Charles H Milligan
Oct 26, 1976· 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 ...
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.
Compared with superphosphate manufacture, the production of dicalcium phosphate for fertilizer purposes, by the conventional method of dissolving phosphate rock in hydrochloric acid and precipitating the phosphate with milkoflime, is uneconomical of reagent materials.
Apr 25, 2017· Bone ash was the major source of phosphates until 1840''s and Phosphate rock mineral containing phosphorus, phosphates and phosphoric acids was first used in 1850''s. A great deal of research was carried to produce dicalcium phosphate by acidulation of phosphate rock and usually when phosphate rock is treated with sulphuric acid, monocalcium ...
UNITED STATES PATENT OFFICE., 0F BROOKLYN, NEW YORK. PROCESS OF MAKING DICALCIUM PHOSPHATE. No Drawing. To all whom it may concern 7 Be it known that I, WALTER GLAESER, a subject of the GermanEmperor, and a resident,of Brooklyn, county of Kings, and State of New York, have invented a new and useful Improvement in Processes of Making Dicalcium Phosphate.
how to produce dicalcium phosphate from hydrochloric acid. Acid Treatment Patents and Patent Applications (Class 423 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.
USA US236886A USA USA US A US A US A US 236886 A US236886 A US 236886A US A US A US A US A US A US A Authority US United States Prior art keywords phosphate solution hydrolysis dicalcium phosphate containing Prior art date Legal status (The legal status .
In the production of dicalcium phosphate, it has been necessary to exert particular care in order that tricalcium phosphate be not produced. The tricalcium phosphate is objectionable because of its extreme fineness which makes filtration difficult and also because it is partially unavailable for fertilizer purposes.
The present invention provides anhydrous dicalcium phosphate particles which satisfies the conflicting requirements of the improvement of handling properties such as high flowability and a small bulk and the improvement of tableting properties at the same time during preparation and a method of producing the same.
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 and followed by hydrolyzing the solution by diluting it with water to a ratio of ...
Dicalcium Phosphate Anhydrous and Dihydrate and Tricalcium Phosphate manufactured serve many purposes in food applications. The main application for food grade phosphoric acid is in the production of cola beverages.
Justia Patents Patents Assigned to BK Ladenburg Patents Assigned to BK Ladenburg ... Abstract: A process is disclosed for the production of granulated dicalcium phosphate dihydrate from finegrained, powered dicalcium phosphate dihydrate, wherein 80 t0 95% of dicalcium phosphate dihydrate with a grain size of less than 120 . and ...
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