申请人:FMC Corporation
公开号:US04379132A1
公开(公告)日:1983-04-05
Either commercial yellow phosphorus or a phosphorus sludge is reacted with a slurry of calcium hydroxide in aqueous sodium hydroxide to form a sodium hypophosphite solution containing calcium and hydroxide ions. The solution is neutralized with phosphoric acid or an acid phosphate salt with the co-production of an insoluble calcium phosphate. The neutral solution is contacted with an ion exchange resin charged with sodium ions to remove any remaining calcium ions.
商业黄磷或磷泥与氢氧化钙浆在水合氢氧化钠中反应,形成含有钙和氢氧化物离子的亚磷酸钠溶液。该溶液与磷酸或酸性磷酸盐中和,同时生成不溶性的磷酸钙。中性溶液与带有钠离子的离子交换树脂接触,以去除任何剩余的钙离子。