PREPARATION OF GYPSUM BY THE DESULFURIZATON FROM WASTE GAS

PREPARATION OF GYPSUM BY THE DESULFURIZATON FROM WASTE GAS

PURPOSE:A method to prepare gypsum by the dusulfurization from waste gas by applying maleic acid as a buffer, sulfurous and sulfuric acid for PH change, and Ca salt for a dissolution agent and a crystallization medium for gypsum.

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Bibliographische Detailangaben
Hauptverfasser: HIZAWA MASAKATSU, WAKABAYASHI ATARU, ASANAGI ETSUO
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS
INORGANIC CHEMISTRY
METALLURGY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
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Beschreibung
Zusammenfassung:PURPOSE:A method to prepare gypsum by the dusulfurization from waste gas by applying maleic acid as a buffer, sulfurous and sulfuric acid for PH change, and Ca salt for a dissolution agent and a crystallization medium for gypsum.