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METHOD FOR PRODUCING A POORLY SOLUBLE CALCIUM-ARSENIC COMPOUND
申请公布号：US2013341283(A1)
申请号：US201214003187
申请日期：2012.03.07
申请公布日期：2013.12.26
发明人：RIIHIMAEKI TEPPO
分类号：C02F1/52
主分类号：C02F1/52
摘要：The invention relates to a method for precipitating pentavalent calcium arsenate from an acidic solution, in which arsenic is at least partially in trivalent form. The acidic solution is neutralised before being routed to an arsenic oxidation stage,and a poorly soluble calcium-arsenic compound is precipitated from the solution, in which all the arsenic is pentavalent.
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SMOKE CONTROL/FIRE EXTINGUISHING EQUIPMENT AND SMOKE CONTROL/FIRE EXTINGUISHING SYSTEM
HOOK CONNECTION RING OF SAFETY BELT FOR WORKING IN OPEN HIGH PLACE
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SEEDING TOLL AND METHOD FOR PRODUCING THE SAME
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