Process for producing a calcium phosphate reactant, reactant obtained and use thereof in the purification of liquid effluents

Process for producing a calcium phosphate reactant, reactant obtained and use thereof in the purification of liquid effluents

This application concerns a process for producing a calcium phosphate reactant, according to which: - in a first step, use is made of a source of calcium and a source of phosphate ions in water, in a molar ratio that is adjusted so as to obtain a Ca/P molar ratio of between 0.5 and 1.6, and the sour...

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Hauptverfasser: Breugelmans, Dirk, Bodson, Olivier Jacques F.J.G, Delplanche, Thierry, Perrin, Patrick
Format: Patent
Sprache:eng
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CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
THEIR RELEVANT APPARATUS
TRANSPORTING
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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creator Breugelmans, Dirk
Bodson, Olivier Jacques F.J.G
Delplanche, Thierry
Perrin, Patrick
description This application concerns a process for producing a calcium phosphate reactant, according to which: - in a first step, use is made of a source of calcium and a source of phosphate ions in water, in a molar ratio that is adjusted so as to obtain a Ca/P molar ratio of between 0.5 and 1.6, and the source of calcium is reacted with the phosphate ions at a pH of between 2 and 8, in order to obtain a suspension (A) of calcium phosphate, and * - in a second step, added to the suspension (A) are an alkaline compound comprising hydroxide ions in order to set a pH of more than 8 and an additional source of calcium in order to obtain a suspension (B) of calcium phosphate reactant having a Ca/P molar ratio of more than 1.6. Further, the application concerns a method for purifying a liquid effluent containing metallic elements and or non/metallic elements with the calcium phosphate reactant obtainable by this process.
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subjects CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
THEIR RELEVANT APPARATUS
TRANSPORTING
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
title Process for producing a calcium phosphate reactant, reactant obtained and use thereof in the purification of liquid effluents
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