PROCESS FOR THE MANUFACTURE OF ALKALI PHOSPHATE SOLUTIONS WITH A LOW VANADIUM CONTENT

PROCESS FOR THE MANUFACTURE OF ALKALI PHOSPHATE SOLUTIONS WITH A LOW VANADIUM CONTENT

Alkali metal phosphate solutions containing little vanadium are made from phosphoric acid containing vanadium. To this end, a negative redox potential is established in the phosphoric acid by addition of a reductant, the acid is partially neutralized and an alkali metal-phosphorus-molar ratio betwee...

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Hauptverfasser: VON SCHENCK, RABAN, JELSMA, ANDRIES, ROOS, WOUTER, KINNEGING, JOHANNES WILHELMUS, DAMMAN, BERNARDUS JOHANNES
Format: Patent
Sprache:eng ; ger
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CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
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creator VON SCHENCK, RABAN
JELSMA, ANDRIES
ROOS, WOUTER
KINNEGING, JOHANNES WILHELMUS
DAMMAN, BERNARDUS JOHANNES
description Alkali metal phosphate solutions containing little vanadium are made from phosphoric acid containing vanadium. To this end, a negative redox potential is established in the phosphoric acid by addition of a reductant, the acid is partially neutralized and an alkali metal-phosphorus-molar ratio between 0.85 and 1.0 is established, the partial neutralization being continued over a period of at least 10 minutes. The partially neutralized acid is not filtered intermediarily and the alkali metal/phosphorus-molar ratio is increased to 1.9 to 2.1 in a second neutralization stage, collected precipitate is separated and processed, if desired.
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subjects CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
title PROCESS FOR THE MANUFACTURE OF ALKALI PHOSPHATE SOLUTIONS WITH A LOW VANADIUM CONTENT
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