RECOVERY OF COMMERCIAL SUBSTANCES FROM APATITE MINERAL
A method for recovery of commercial substances from apatite mineral comprises dissolving (S10) of apatite mineral in an acid comprising hydrochloride. The dissolution gives a first liquid solution comprising phosphate, calcium and chloride ions. The first liquid solution is treated (S20) into a seco...
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Main Authors | , , , , |
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Format | Patent |
Language | English French German |
Published |
04.10.2023
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Subjects | |
Online Access | Get full text |
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Summary: | A method for recovery of commercial substances from apatite mineral comprises dissolving (S10) of apatite mineral in an acid comprising hydrochloride. The dissolution gives a first liquid solution comprising phosphate, calcium and chloride ions. The first liquid solution is treated (S20) into a second liquid solution comprising calcium and chloride ions. This treatment in turn comprises extracting (S22) of a major part of the phosphate ions with an organic solvent. A bleed solution is removed (S30) from the second solution. Solid gypsum comprising at least 70% in a di-hydrate crystal form is precipitated (S40) from the second solution. This precipitation of solid gypsum comprises adding (S42) the second solution and sulfuric acid simultaneously into a continuous-stirred reactor in the presence of gypsum crystals. Thereby, the precipitation of solid gypsum gives a third liquid solution comprising hydrochloride. An arrangement for recovery of commercial substances from apatite mineral is also presented. |
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Bibliography: | Application Number: EP20210898803 |