
US2728635A US236886A US23688651A US2728635A US 2728635 A US2728635 A US 2728635A US 236886 A US236886 A US 236886A US 23688651 A US23688651 A US 23688651A US 2728635 A US2728635 A US 2728635A Authority US United States Prior art keywords phosphate solution hydrolysis dicalcium phosphate containing Prior art date 1951-07-16 Legal status (The legal status

US1235025A US9460216A US9460216A US1235025A US 1235025 A US1235025 A US 1235025A US 9460216 A US9460216 A US 9460216A US 9460216 A US9460216 A US 9460216A US 1235025 A US1235025 A US 1235025A Authority US United States Prior art keywords calcium making phosphate process dicalcium phosphate Prior art date 1916-05-01 Legal status (The legal status is an

US2948590A US636468A US63646857A US2948590A US 2948590 A US2948590 A US 2948590A US 636468 A US636468 A US 636468A US 63646857 A US63646857 A US 63646857A US 2948590 A US2948590 A US 2948590A Authority US United States Prior art keywords acid product phosphoric acid slurry dicalcium phosphate Prior art date 1957-01-28 Legal status (The legal status is an

The present invention relates to a process for the manufacture of disodium phosphate of a high purity without utilizing organic solvents. According to the process, monosodium sulfate is reacted, at a temperature, in the range of 40 to 100 degrees C. with a phosphate constituent selected from phosphate rock, dicalcium phosphate or mixtures thereof, in the presence of phosphoric acid.

US3488145A US3488145DA US3488145A US 3488145 A US3488145 A US 3488145A US 3488145D A US3488145D A US 3488145DA US 3488145 A US3488145 A US 3488145A Authority US United States Prior art keywords mother liquor dicalcium phosphate p205 crystals ratio Prior art date 1966-12-13 Legal status (The legal status is an assumption and is not a legal conclusion.

It also relates to methods for the manufacture of monocalcium phosphate fertilizer, edible monocalcium phosphate and edible dicalcium phosphates. BACKGROUND OF THE INVENTION. Tricalcium orthophosphate, Ca3(PO4)2, commonly known as calcium phosphate, occurs in nature as rock phosphate ore, for example and is used as such as a source of fertilizer.

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.

process for making dicalcium phosphate from rock phosphate . Jul 26, 2016 Phosphate rock is a mixture of many minerals, but it has generous Patent US3427124, Method of producing dicalcium phosphate Cited Patent Filing date Publication date Applicant Title; US2021527 . More

Phosphoric acid is produced by either a dry or a wet process. In the dry process, phosphate rock is treated in an electric furnace to produce a very pure and more expensive phosphoric acid (frequently called white or furnace acid). In the wet process, the phosphate rock was treated with acid producing phosphoric acid (also called green or

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.

patent of dicalcium phosphate from rock phosphate patent of dicalcium phosphate from rock phosphate. Get Price Online. Feeds Regulations, 1983 . Process for the manufacture of monopotassium phosphate. 2. A process according to claim 1, wherein the phosphoric acid in step (a) is produced insitu, from an additional amount of phosphate rock 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.

patent of dicalcium phosphate from rock phosphate. Patent US3988420 Processes for the manufacture of feedgrade Oct 26 1976 The process comprises the reaction of an excess of phosphate rock with feed grade dicalcium phosphate is precipitated with calcium hydroxide calcium Try the new Google Patents with machineclassified Google Scholar . Learn More

Pubchem Patents: Search Use: Dicalcium phosphate (Dihydrate) is mainly used as a dietary supplement in phosphoric acid, calcium salt (1:1), dihydrate Get Quote; Di-calcium phosphate by direct acidulation of phosphate rock. phosphate rock to the filtrate and final separation of di-calcium phos phates .

mozambique+dicalcium phosphate dicalcium phosphate from rock phosphate Formulations. Project Report and Handbook from -dicalcium phosphate from rock phosphate. Chat Online; DI CALCIUM PHOSPHATE (FEED GRADE), Rock phosphate is the source from which dicalcium phosphate can be manufactured. It finds applicability as a fertilizer and

Theoretical and practical experience of calcium phosphate inhibition in RO waters. Authors: reservoir. On land, phosphate rock deposits are the primary source of phosphorus. Through natural and Other mineral phases such as dicalcium phosphate dihydrate (DCPD) octacalcium phosphate (OCP) and amorphous tricalcium phosphate (TCP)

The method of preparing monocalcium phosphate which comprises reacting lime with crude phosphoric acid containing iron and fluorine in solution to form a monocalcium phosphate liquor containing fluorine in amount less than about 0.03% and from about 1.3% to 1.6% iron, calculated as FPe203 and having a pH between about 2 and about 3, adding

Dicalcium Phosphate Patents anreximin patent of dicalcium phosphate from rock phosphate Patents on Phosphate processingbone and, But acid treatment of rock phosphate . Get Information; phosphate rock dicalcium . Dicalcium phosphate Wikipedia. Dicalcium phosphate is the calcium phosphate with the formula CaHPO4 and its dihydrate.

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.

A legacy of innovation and service Feed Products has a long history of personal service and superior feed products. Our decades-long relationships with many customers started with Earl Fallin in 1945 when he founded the company with a patented process for producing dicalcium feed phosphate.

Patents on phosphate rock benefication SKD is a leading global manufacturer of crushing and milling equipment patents on phosphate rock beneficationSKD also supply individual patents on phosphate rock benefication crushers and mills as well as spare parts of them. More Details Rock Phosphate Mill For Phosphoric Acid Pants

patents on phosphate rock benefication SKD Heavy Industry is a high-tech company integrating R&D, production and distribution, and provides crusher, sand making, grinding equipment, mobile crushing station, etc. mature products and solutions used in aggregate, mining and waste recycling.

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.

A legacy of innovation and service Feed Products has a long history of personal service and superior feed products. Our decades-long relationships with many customers started with Earl Fallin in 1945 when he founded the company with a patented process for producing dicalcium feed phosphate.

Patents on phosphate rock benefication SKD is a leading global manufacturer of crushing and milling equipment patents on phosphate rock beneficationSKD also supply individual patents on phosphate rock benefication crushers and mills as well as spare parts of them. More Details Rock Phosphate Mill For Phosphoric Acid Pants

patents on phosphate rock benefication SKD Heavy Industry is a high-tech company integrating R&D, production and distribution, and provides crusher, sand making, grinding equipment, mobile crushing station, etc. mature products and solutions used in aggregate, mining and waste recycling.

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

Processes for the manufacture of feed-grade dicalcium phosphate . 26 Oct 1976 The process comprises the reaction of an excess of phosphate rock with aqueo. Download PDF 3988420 PDF help. US Patent 3033669, Process for the manufacture of dicalcium phosphate, May, 1962, Strauchen et al. »More detailed

Search for Acid Treatment Patents and Patent Applications (Class 423/157.3) Filed with the USPTO Phosphate rock is reacted with phosphoric acid to produce monobasic calcium phosphate. Monobasic calcium phosphate is reacted with ammonium carbonate to produce ammonium phosphate. A method of producing dicalcium phosphate from calcium

we provide information such as Process, Technology, Applications, Patent, Dicalcium phosphate shows the most commonly used production method is known GET MORE INFORMATION. A new process for the production of defluorinated dicalcium phosphate using phosphate rock was developed. This new process has the main characteristic of.

Nov 01, 2013· A LIQUID PHOSPHATE FERTILIZER SOLUTION FOR AGRONOMIC USE, obtained from defluorinated phosphate rock, previously treated in an acidic medium, with the particularity of being almost entirely available and assimilable, apart from being maintained in solid state, ensuring that phosphorus is kept soluble in the soil substrate so that it can be

patent of dicalcium phosphate from rock phosphate 2017 Edition statistics.gov.hk hkhs code 8-digit 01012100 c62 unit 01012910 live horses, for racing 01012990 live horses, other than those for pure-bred breeding or racing 01013000

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 milk-oflime, is uneconomical of reagent materials.

manufacturing process of dicalcium phosphate with phosphate rock Production of dicalcium phosphate by treatment of phosphate rock This paper presents results laboratory experiments to test a new process for manufacture of dicalcium phosphate.

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.

The method of producing dicalcium phosphate and sodium nitrate from phosphate rock containing fluorine which comprises reacting the phosphate rock with nitric acid in the presence of sufficient silica for precipitating as silicofluoride substantially all of the fluorine present in the rock in the presence of an excess of alkali metal nitrate
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