PROCESS FOR PREPARING PRECIPITATED BARIUM SULPHATE

The invention relates to a process for preparing precipitated barium sulphate by treating witherite or technical BaCO3 with hydrochloric acid and NaOH, up to reaching a pH value of 4.5...5. The suspension is then alkalized up to a pH=11. The resulting barium chloride solution is treating with sulphu...

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Bibliographic Details
Main Author STOICA IONEL AUGUSTIN
Format Patent
LanguageEnglish
Romanian
Published 30.05.2008
Subjects
CHEMISTRY
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
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Summary:The invention relates to a process for preparing precipitated barium sulphate by treating witherite or technical BaCO3 with hydrochloric acid and NaOH, up to reaching a pH value of 4.5...5. The suspension is then alkalized up to a pH=11. The resulting barium chloride solution is treating with sulphuric acid to precipitate the barium sulphate. Invenţia se referă la un procedeu de obţinere a sulfatului de bariu precipitat, prin tratarea witerit-ului sau BaCO3 tehnic cu acid clorhidric ?i NaOH, până la obţinerea unei valori a pH-uluide 4,5...5. Suspensia se alcalinizează apoi până la pH = 11. Soluţia de clorură de bariu rezultată este tratată cu acid sulfuric, pentru precipitarea sulfatului de bariu.
Bibliography:Application Number: RO20030000244