sodium-tungstate.com - 钨酸钠 – 钨酸钠专业生产商和供应商 - 中钨在线
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Description: 钨酸钠是无机化合物,是钨酸盐的一种,常用于生产钨制品。
钨酸钠 (8)
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钨酸钠是无机化合物,化学式是Na 2 WO 4 •2H 2 O。这种白色的,水溶性固体是邻位钨酸的钠盐。作为化学合成钨的原料,钨酸钠是钨矿转化为金属过程中的重要中间体。
钨酸钠是无色或白色结晶粉末,分子量329.86。在干燥空气中风化。易溶于水,水溶液呈弱碱性,不溶于醇。无水物熔点698℃。用做分析试剂、生物碱沉淀剂、织物的防水防火剂和制取金属钨及其化合物的原料。向20%NaOH溶液中加入过量的H 2 WO 4 ,加热、过滤、蒸发、结晶制得本品。
本品用作织物助剂,由钨酸钠、硫酸铵磷酸铵等组成的混合物用于纤维的防火和防水。此种纤维可制作防火人造丝和人造棉。亦可用于织物加重,皮革鞣制,电镀镀层防腐。本品作助溶剂引入瓷釉色料能起降低烧成温度和补色作用。
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