Production of magnesium phosphate from apatite and carnallite. 2. Solubility in citric acid

Petahia Bar-On; Ithamar Pelly

doi:10.1021/jf60221a050

Production of magnesium phosphate from apatite and carnallite. 2. Solubility in citric acid

Petahia Bar-On
, Ithamar Pelly

Department of Earth and Environmental sciences

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

Magnesium phosphate was produced from Oron phosphate and carnallite. Solubilities of the product in citric acid were studied as a function of reaction temperatures, F/P ratios, Mg/Ca ratios, reaction times, grinding the phosphate, particle size of the raw phosphate, and precalcination of the phosphate. Enrichment in P₂0₅ was studied. Reactions with ground phosphate showed a maximum solubility at 450 ±C (the highest obtained under all conditions) and a minimum at 550 ±C, after which there is no difference between ground and unground phosphate. Two factors seem to be involved. One is catalysis of the reaction causing the production of soluble phosphate and is due to grinding and not to particle size. The other is connected with raising the temperature, which lowers solubilities. Enrichment in P₂0₅ by several methods tested in this study resulted in higher P₂0₅ content but low solubilities of the product in citric acid.

Original language	English
Pages (from-to)	152-157
Number of pages	6
Journal	Journal of Agricultural and Food Chemistry
Volume	27
Issue number	1
DOIs	https://doi.org/10.1021/jf60221a050
State	Published - 1 Feb 1979

ASJC Scopus subject areas

General Chemistry
General Agricultural and Biological Sciences

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title = "Production of magnesium phosphate from apatite and carnallite. 2. Solubility in citric acid",

abstract = "Magnesium phosphate was produced from Oron phosphate and carnallite. Solubilities of the product in citric acid were studied as a function of reaction temperatures, F/P ratios, Mg/Ca ratios, reaction times, grinding the phosphate, particle size of the raw phosphate, and precalcination of the phosphate. Enrichment in P205 was studied. Reactions with ground phosphate showed a maximum solubility at 450 ±C (the highest obtained under all conditions) and a minimum at 550 ±C, after which there is no difference between ground and unground phosphate. Two factors seem to be involved. One is catalysis of the reaction causing the production of soluble phosphate and is due to grinding and not to particle size. The other is connected with raising the temperature, which lowers solubilities. Enrichment in P205 by several methods tested in this study resulted in higher P205 content but low solubilities of the product in citric acid.",

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T1 - Production of magnesium phosphate from apatite and carnallite. 2. Solubility in citric acid

AU - Bar-On, Petahia

AU - Pelly, Ithamar

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N2 - Magnesium phosphate was produced from Oron phosphate and carnallite. Solubilities of the product in citric acid were studied as a function of reaction temperatures, F/P ratios, Mg/Ca ratios, reaction times, grinding the phosphate, particle size of the raw phosphate, and precalcination of the phosphate. Enrichment in P205 was studied. Reactions with ground phosphate showed a maximum solubility at 450 ±C (the highest obtained under all conditions) and a minimum at 550 ±C, after which there is no difference between ground and unground phosphate. Two factors seem to be involved. One is catalysis of the reaction causing the production of soluble phosphate and is due to grinding and not to particle size. The other is connected with raising the temperature, which lowers solubilities. Enrichment in P205 by several methods tested in this study resulted in higher P205 content but low solubilities of the product in citric acid.

AB - Magnesium phosphate was produced from Oron phosphate and carnallite. Solubilities of the product in citric acid were studied as a function of reaction temperatures, F/P ratios, Mg/Ca ratios, reaction times, grinding the phosphate, particle size of the raw phosphate, and precalcination of the phosphate. Enrichment in P205 was studied. Reactions with ground phosphate showed a maximum solubility at 450 ±C (the highest obtained under all conditions) and a minimum at 550 ±C, after which there is no difference between ground and unground phosphate. Two factors seem to be involved. One is catalysis of the reaction causing the production of soluble phosphate and is due to grinding and not to particle size. The other is connected with raising the temperature, which lowers solubilities. Enrichment in P205 by several methods tested in this study resulted in higher P205 content but low solubilities of the product in citric acid.

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Production of magnesium phosphate from apatite and carnallite. 2. Solubility in citric acid

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