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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 to 10 hours while maintaining the temperature of the reaction mixture below C. The reaction yields a mixture of gangue, solid calcium .alpha.hydroxy sulfonate and soluble dicalcium phosphate.
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 ...
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 .
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 ...
Substantially fluoridefree 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 ... United States Patent : 4,191,734: Drechsel, et al. ... the process including steps for production of pure phosphoric acid and potassium ...
Process of manufacturing feed blocks and products thereof ... LINEHAN KEVIN L ICI AUSTRALIA LTD. Patent: United STATES Patent United States. Application: US on 1978 ... feed supplement blocks by chemically hardening a nutrient containing water bearing medium using active magnesium oxide and dicalcium phosphate. Priority number: ...
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 ...
USA US32082A USA USA US A US A US A US 32082 A US32082 A US 32082A US A US A US A US A US A US A Authority US United States Prior art keywords stage ph liquor dcp process Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
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.
Abstract: A process for the preparation of coarseparticle dicalcium phosphate dihydrate having a virtually spherical crystal shape and a particle size range between about 63 and 450 ., preferably between about 90 and 300 ., by reacting pure aqueous phosphoric acid with aqueous suspensions of precipitated chalks, wherein an amount of suspension corresponding to the reaction product ...
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 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.
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.
In United States Patent No. ''2,143,438, dated January 10, 1939, I have described a process for the production of monocalcium chlorophosphate,, which process comprises treating phosphate rock with hydrochloric acid, adding thereto sufficient phosphoric acid, or monocalcium phosphate, to convert all of the lime present in the ...
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 .
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
Methods and products related to the physical conversion of reactive amorphous calcium phosphate Abstract. The present invention provides a novel process for producing a calcium phosphate cement or filler which hardens in a temperature dependent fashion in association with an endothermic reaction.
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 .
Feb 06, 2001· Production of dicalcium phosphate or monocalcium phosphate from calcium phosphate . United States Patent . 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 ...
Apr 28, 1992· United States Patent ... 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 μm and 20 to 5% of calcium hydroxide with a grain size of less than 120 μm are ...
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.
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). Production of dicalcium phosphate or monocalcium phosphate from calcium phosphate. Patent number: ...
An improved method for manufacturing feed grade dicalcium phosphate comprising: diluting wetprocess superphosphoric acid with water to form a dilute aqueous superphosphoric acid solution containing about 4055% phosphorus pentoxide, contacting said solution with a calcium salt selected from the group consisting of calcium oxide and calcium ...
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. Read More
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