7446-08-4 二氧化硒

1.硒粉氧化法将硒粉和氧气在二氧化氮的存在下进行反应，生成物经冷却，得到成品，再经升华制得纯的二氧化硒。其

2.硝酸氧化法将粗硒粉加到反应器中与硝酸进行反应，生成物经浓缩、过滤、干燥，再加热分解，制得二氧化硒。其
提纯方法 Purify it by sublimation at 315o, or by solution in HNO3, precipitation of selenium which, after standing for several hours or boiling, is filtered off, then re-oxidised by HNO3 and cautiously evaporated to dryness below 200o. The dioxide is dissolved in H2O and again evaporated to dryness. In H2O it forms selenious acid (see selenious acid above). Its solubility in H2O is 70%w/w at 20o, and it is soluble in EtOH. [Waitkins & Clark Chem Rev 36 235 1945, Fehér in Handbook of Preparative Inorganic Chemistry (Ed Brauer) Academic Press Vol I p 421 1963.] 垃圾处理 Consult with environmental regulatory agencies for guidance on acceptable disposal practices. Generators of waste containing this contaminant (≥100 kg/mo) must conform to EPA regulations governing storage, transportation, treatment, and waste disposal. Selenium dioxide Preparation Products And Raw materials Preparation Products 用途 用于制高纯硒和其他硒化合物，还是有机合成药物的氧化剂和催化剂;

用作植物碱之特殊试剂，还可用于沉淀锆、铪和制备硒化合物;

用作有机化合物氧化剂、催化剂、化学试剂，各种无机硒化合物制造的原料。也在复印机、整流器等中使用。;

制造其他硒化合物，生物碱检定，氧化剂。与氨反应生成氮和硒，在醇溶液中则生成亚硒酸乙基铵[NH4(C2H5)SeO3],与肼生成氮和黑色无定形硒，与盐酸羟胺生成氮和红棕色无定形硒，与硝酸生成亚硒酸。溶解度：38.4 g/100mL 水(14°C)，1.11%醋酸(13.9°C)、10.16 %甲醇(11.8°C)、6.67 % 93%的乙醇(14°C)，4.35 %丙酮ACETONE (15.3°C)。;