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Apr 28, 1992· United States Patent 5108728 ... A process is disclosed for the production of granulated dicalcium phosphate dihydrate from fine-grained, powered dicalcium phosphate dihydrate, wherein 80 t0 95% of dicalcium phosphate dihydrate with a grain size of less than 120 μm and 20 to 5% of calcium hydroxide with a grain size of less than 120 μm are ...
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 ...
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 fertilizer-grade dicalcium phosphate from low-grade phosphatic raw materials as well as from high-grade phosphate rock. 2.
Patent of dicalcium phosphate from rock phosphate - YouTube. Aug 17, 2016 ... Patent US3928016 manufacturing process of dicalcium phosphate from rock. ... rock is acidulated for making dicalcium phosphate, and in US. Read More
UNITED STATES PATENT OFFICE. WALTER.GLAESEB, 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.
Buy Dicalcium Phosphate Flowing agent Dicalcium Phosphate is used in the production of tablets & capsul Dicalcium Phosphate dramatically improves flow, Flowability is a crucial element of the manufacturing process It ensures that your ingredients will run through machinery with ease Additionally, it means that your final products will .
Substantially fluoride-free phosphoric acid is produced by the acidulation of phosphate rock with sulfuric acid wherein the acidulation reaction is conducted in the presence of added potassium as K.su ... United States Patent : 4,191,734: Drechsel, et al. ... the process including steps for production of pure phosphoric acid and potassium ...
Abstract: 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 .mu.m, preferably between about 90 and 300 .mu.m, by reacting pure aqueous phosphoric acid with aqueous suspensions of precipitated chalks, wherein an amount of suspension corresponding to the reaction product ...
manufacturing process for preparation of dicalcium phosphate. Example of phosphoric acid production. Wet process phosphoric acid is prepared by adding sulfuric acid (H 2 SO 4) to apatite or tricalcium phosphate rock resulting in the following reaction: . 3 H 2 SO 4 + Ca 3 (PO 4) 2 + 6 H 2 O ↔ 2 H 3 PO 4 + 3 CaSO 4 •2H 2 O .
US3033669A US32082A US3208260A US3033669A US 3033669 A US3033669 A US 3033669A US 32082 A US32082 A US 32082A US 3208260 A US3208260 A US 3208260A US 3033669 A US3033669 A US 3033669A Authority US United States Prior art keywords stage ph liquor dcp process Prior art date 1959-07-16 Legal status (The legal status is an assumption and is not a legal conclusion.
Recovery of calcium fluoride from phosphate operation waste water Abstract. Calcium fluoride is produced from pond waters resulting from phosphoric acid processing by treating the pond waters with calcium carbonate and/or calcium oxide in two stages to precipitate out the major part of the fluorine values from the waters as calcium fluoride.
Feb 06, 2001· 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. ... In this process, the ...
An improved method for manufacturing feed grade dicalcium phosphate comprising: diluting wet-process superphosphoric acid with water to form a dilute aqueous superphosphoric acid solution containing about 40-55% phosphorus pentoxide, contacting said solution with a calcium salt selected from the group consisting of calcium oxide and calcium ...
Process for the production of single- or multi-phase materials of biological interest (PAT - US5631016 ... DEUDON CATHERINE. UNIV NANTES. Patent: United STATES Patent - United States. Application: US19950428105 on 1995-04-26 ... e.g. octocalcium phosphate, dicalcium phosphate, dihydrated dicalcium phosphate, tricalcium phosphate and ...
Process of production of anhydrous monocalcium phosphate . United States Patent 2271361 . Abstract: This invention pertains to an improved process for manufacturing monocalcium phosphate and. also for improving the physical and chemical properties of commercial forms of monocalcium phosphate. ... decrease of P205 yields calcium monophosphate ...
us patent for manufacturing process of dicalcium phosphate. United States Patent, Process for the production of dicalcium phosphate, In the process described in this patent, dicalcium phosphate is taken into . Get Price And Support Online; dicalciumphosphate production flow chart ppt
references cited in the file of this patent united states patents . claims (1) 1. process for the production of a granular, animal feed grade, dicalcium phosphate product which comprises forming a slurry having a solids content between about 50% and about 70% by weight of comminuted calcium carbonate and an aqueous medium, thoroughly mixing and ...
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.
production line of dicalsium phosphate . production line of dicalsium phosphate. phosphate, superphosphate production plant and dicalcium phosphate feed grade price ... Thola Intengo dicalcium phosphate machinery & .
Dicalcium phosphate dihydrate composition having improved monofluorophosphate compatibility are prepared by the addition of magnesium oxide and pyrophosphoric acid to the reaction mixture, and terminating the reaction by which the dicalcium phosphate dihydrate is formed at a low pH.
Process for the production of dicalcium phosphate US Patent Process for the production of dicalcium phosphate Abstract. 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 compound; the leach liquor containing dissolved phosphate ...
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 .
Abstract: dicalcium phosphate is prepared from phosphate rock by a process which comprises reacting phosphate rock with sulfur dioxide and an organic carbonyl compound for 0.5 to 10 hours while maintaining the temperature of the reaction mixture below 50.degree. C. The reaction yields a mixture of gangue, solid calcium .alpha.-hydroxy sulfonate and soluble dicalcium phosphate.
Sep 02, 2008· This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO). ... avoiding production of inhomogeneities, ... cleaning agent for tooth pastes based on dicalcium phosphate-dihydrate, and process for making such cleaning agent.
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