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Dicalcium phosphate - Wikipedia
Dibasic calcium phosphate is produced by the neutralization of calcium hydroxide with phosphoric acid, which precipitates the dihydrate as a solid. At 60 °C the anhydrous form is precipitated: To prevent degradation that would form hydroxyapatite, sodium pyrophosphate or trimagnesium phosphate octahydrate are added when for example, dibasic cal
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Recovery and separation of phosphorus as dicalcium
In this study, we develop an integrated process for the direct recovery and separation of dicalcium phosphate dihydrate for fertilizer and livestock
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Life cycle assessment of feed grade mono-dicalcium
2021年3月25日 LCA was performed on the mono-dicalcium phosphate production. • The processes with the greatest environmental impacts was identified. • Pollution from
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Dicalcium Phosphate - an overview ScienceDirect Topics
Brushite or dicalcium phosphate dihydrate (DCPD: CaHPO4 2H 2 O) is the most stable phase themodynamically when pH is 4.2 or lower ( Fig. 1 ). Therefore, mixture of calcium
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Clean process for the production of defluorinated dicalcium
1994年4月1日 Abstract. A new process for the production of defluorinated dicalcium phosphate using phosphate rock was developed. This new process has the main
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Process for the manufacture of dicalcium phosphate
The 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%
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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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Process of making dicalcium phosphate. - Google Patents
In a method of making di-calcium phosphate, the steps which consist in treating phosphate rock with hydrochloric acid under heat, cooling the mixture to abut 30 C., treating the
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Production of dicalcium phosphate by treatment of
5 Citations Metrics Abstract This paper presents results laboratory experiments to test a new process for manufacture of dicalcium phosphate. The process is based on the nitric
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Life cycle assessment of feed grade mono-dicalcium
2021年3月25日 LCA was performed on the mono-dicalcium phosphate production. • The processes with the greatest environmental impacts was identified. • • Cost related to mono-dicalcium phosphate production was computed. • Energy consumption of mono-dicalcium phosphate production was visualized. Abstract
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Recovery and separation of phosphorus as dicalcium
In this study, we develop an integrated process for the direct recovery andseparation of dicalcium phosphate dihydrate for fertilizer and livestock feed additive production froma low-grade (2.0 wt% P) iron-rich (19.7 wt% Fe) phosphate ore.
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Dicalcium Phosphate - an overview ScienceDirect Topics
Brushite or dicalcium phosphate dihydrate (DCPD: CaHPO4 2H 2 O) is the most stable phase themodynamically when pH is 4.2 or lower ( Fig. 1 ). Therefore, mixture of calcium phosphate powder which supply Ca 2+ and ions and the pH of the paste is 4.2 or lower could be the brushite cement. One of the key components of brushite cement is β-TCP ...
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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 low concentration of P 2 O 5 in the liquid phase.
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Clean process for the production of defluorinated dicalcium
1994年4月1日 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 of any liquid waste. The process has essentially three main steps: phosphate rock digestion, defluorination and neutralization.
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Production of dicalcium phosphate by treatment of
5 Citations Metrics Abstract 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.
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Process of making dicalcium phosphate. - Google Patents
Description UNITED STATES PATENT OFFICE. WALTER.GLAESEB, 0F BROOKLYN, NEW YORK. PROCESS OF MAKING DICALCIUM PHOSPHATE.
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Process for producing phosphoric acid and dicalcium
The sulfuric acid requirement for production of the dicalcium phosphate as the sole product can be calculated from the results shown in Tables 1, 2, 3 and 4, when a single staged association is carried out under conditions that give a 70% conversion of monocalcium phosphate to dicalcium phosphate and sulphuric acid, the sulphuric acid
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(PDF) The future of dicalcium phosphate
2011年1月1日 It is insoluble in water but soluble in citric acid and is an excellent fertilizer. This technology does not interfere with uranium recovery if desired. In addition it permits the recovery of rare ...
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Production of dicalcium phosphate by treatment of
Thispaper presents resultslaboratory experiments totest anew processformanufactureofdicalciumphosphate.Theprocess isbased onthe nitric acidulation ofphosphate rockconcentrate,followedby neutralizationofthe extract liquor with calcium carbonate. Theprecipitateddicalciumphosphate is thenseparatedfromcalcium nitrate
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Life cycle assessment of feed grade mono-dicalcium phosphate production ...
2021年3月25日 Importantly, when the available phosphate ore grade decreases from 25% to 15% because of gradual phosphate resources depletion, cost related to mono-dicalcium phosphate production was computed as from 300.76 to 332.35 US $. It will provide useful guidance for phosphate enterprises in China under different market price.
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A new process for production of purified phosphoric acid and/or ...
A new process for production of purified phosphoric acid and/or fertilizer grade dicalcium phosphate from various grades of phosphatic materials. Grover L. Bridger, Carl B. Drees, and ; Amitava H. Roy; Cite this: Ind. Eng. Chem. Process Des. Dev. 1981, 20, 3, 416–424. Publication ... all institutions and individuals. These metrics are ...
learn moreProduction 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 P 2 O 5 in the liquid phase.
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2007年4月24日 In addition, HCl process has significant application in feed-grade dicalcium phosphate production ( Fig. 27(Process B)) [208,209]. ... Wang et al. [216] achieved 70-79% of total recovery and
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Production of dicalcium phosphate by treatment of phosphate
5 Citations Metrics Abstract 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.
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Dose assessment to workers in a dicalcium phosphate production
2016年12月1日 In most cases (85%) the PR is acid digested (wet process) and is later converted into intermediate or final products, including phosphoric acid (70%), and a variety of other products such as animal feed supplements (i.e.
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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
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(PDF) PRODUCTION OF DICALCIUM PHOSPHATE FROM LAO
2017年4月17日 The production of Dicalcium phosphate from Lao Cai second grade apatite was investigated by leaching with dilute hydrochloric acid. Various factors affecting the process such as particle size ...
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ISSN : 0974 - 7443 chemical technology - TSI Journals
ABSTRACTDicalcium phosphate dihydrate (precipitate) is used in agriculture as anadditive to livestock food and as phosphorous containing mineral fertilizer.There are several methods for its production depending on the mineralacid used
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(PDF) The future of dicalcium phosphate
2011年1月1日 The future of dicalcium phosphate January 2011 Authors: Fathi Habashi Laval University Abstract and Figures The phosphate fertilizer industry is at present based mainly on the use of sulfuric...
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