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公开(公告)号：US4380531A
公开(公告)日：1983-04-19
申请号：US313416
申请日：1981-10-21
申请人： Joseph S. Wisnouskas , Roland Ho
发明人： Joseph S. Wisnouskas , Roland Ho
IPC分类号： C01B25/163 , C01B25/16
CPC分类号： C01B25/163
摘要： An improved process is provided for preparing highly purified phosphorus acid from industrial waste materials which are produced as by-products from the manufacture of sodium hypophosphite. Such industrial waste materials contain substantial quantities of calcium phosphite, and appreciable quantities of various metals such as iron, magnesium, aluminum and arsenic. The process of the present invention comprises, in a preferred embodiment thereof, reacting a slurry of said waste materials with sodium carbonate to produce calcium carbonate as a precipitate and a solution of sodium phosphite. The sodium phosphite solution is then passed through a cation ion exchange resin in the hydrogen form to produce a highly purified phosphorus acid product having significantly reduced quantities of metallic impurities.
摘要翻译： 提供了一种改进的工艺，用于从工业废料制备高纯度的磷酸，它们是由次磷酸钠生产的副产物。 这种工业废料含有大量的亚磷酸钙，以及大量的各种金属如铁，镁，铝和砷。 在其优选实施方案中，本发明的方法包括使所述废料的浆料与碳酸钠反应以产生作为沉淀物的碳酸钙和亚磷酸钠溶液。 然后将亚磷酸钠溶液通过氢形式的阳离子交换树脂，以产生具有显着降低量的金属杂质的高度纯化的磷酸产物。
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公开(公告)号：US4518573A
公开(公告)日：1985-05-21
申请号：US631262
申请日：1984-07-16
CPC分类号： B03D1/002 , B03D2203/02
摘要： A dry differential flotation reagent for molybdenum-bearing ore is disclosed comprising from about 1 to about 30 percent by weight of NaSH, 0 to 20 percent by weight of NaOH, 60 to 90 percent by weight of a mixture of sodium thiophosphates comprising, as major components thereof, Na.sub.3 PS.sub.4, Na.sub.3 PS.sub.3 O, Na.sub.3 PS.sub.2 O.sub.2, and Na.sub.3 PO.sub.3 S, with Na.sub.3 PS.sub.4 further comprising from about 15 mole percent to about 70 mole percent of the phosphate mixture. The flotation reagent can be prepared by reacting P.sub.4 S.sub.10 with NaOH and NaSH in a molar ratio of about 1:16. When added to a flotation vessel containing molybdenum concentrate, the flotation reagent promotes suppression of lead and copper sulfides, even without the addition of sodium cyanide, to permit the improved recovery of molybdenum with a lower level of impurities.
摘要翻译： 公开了一种用于含钼矿石的干差示浮选试剂，其包含约1至约30重量％的NaSH，0至20重量％的NaOH，60至90重量％的硫代磷酸钠混合物，其包含主要 Na 3 PS 4，Na 3 PS 3 O，Na 3 PS 2 O 2和Na 3 PO 3 S，其中Na 3 PS 4还包含约15摩尔％至约70摩尔％的磷酸盐混合物。 浮选剂可以通过使P4S10与NaOH和NaSH以约1:16的摩尔比反应制备。 当添加到含有钼精矿的浮选容器时，浮选试剂即使没有添加氰化钠也促进铅和硫化铜的抑制，以允许以较低水平的杂质改善钼的回收。
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公开(公告)号：US4337235A
公开(公告)日：1982-06-29
申请号：US258498
申请日：1981-04-28
IPC分类号： C01B17/45
CPC分类号： C01B17/4584
摘要： A process for the purification of crude thionyl chloride wherein the crude thionyl chloride is distilled in the presence of sulfur and a sulfur-aluminum chloride catalyst to convert the impurities, sulfuryl chloride and sulfur dichloride and remove them from the distillate of thionyl chloride. The thionyl chloride collected will contain less than 0.01% sulfuryl chloride, less than 0.1% sulfur monochloride and less than 0.01% sulfur dichloride.
摘要翻译： 粗亚硫酰氯的纯化方法，其中在硫存在下蒸馏粗亚硫酰氯和硫 - 氯化铝催化剂以转化杂质，磺酰氯和二氯化硫，并将其从亚硫酰氯的馏出物中除去。 收集的亚硫酰氯含有少于0.01％的磺酰氯，少于0.1％的一氯化硫和少于0.01％的二氯化硫。
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公开(公告)号：US4575419A
公开(公告)日：1986-03-11
申请号：US689422
申请日：1985-01-07
CPC分类号： B03D1/002 , B03D2201/02 , Y10S430/165
摘要： A dry differential flotation reagent for molybdenum-bearing ore is disclosed comprising from about 1 to about 30 percent by weight of NaSH, 0 to 20 percent by weight of NaOH, 60 to 90 percent by weight of a mixture of sodium thiophosphates comprising, as major components thereof, Na.sub.3 PS.sub.4, Na.sub.3 PS.sub.3 O, Na.sub.3 PS.sub.2 O.sub.2, and Na.sub.3 PO.sub.3 S, with Na.sub.3 PS.sub.4 further comprising from about 15 mole percent to about 70 mole percent of phosphate mixture. The flotation reagent can be prepared by reacting P.sub.4 S.sub.10 with NaOH and NaSH in a molar ratio of about 1:16. When added to a flotation vessel containing molybdenum concentrate, the flotation reagent promotes suppression of lead and copper sulfides, even without the addition of sodium cyanide, to permit the improved recovery of molybdenum with a lower level of impurities.
摘要翻译： 公开了一种用于含钼矿石的干差示浮选试剂，其包含约1至约30重量％的NaSH，0至20重量％的NaOH，60至90重量％的硫代磷酸钠混合物，其包含主要 Na 3 PS 4，Na 3 PS 3 O，Na 3 PS 2 O 2和Na 3 PO 3 S，其中Na 3 PS 4还包含约15摩尔％至约70摩尔％的磷酸盐混合物。 浮选剂可以通过使P4S10与NaOH和NaSH以约1:16的摩尔比反应制备。 当添加到含有钼精矿的浮选容器时，浮选试剂即使没有添加氰化钠也促进铅和硫化铜的抑制，以允许以较低水平的杂质改善钼的回收。
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公开(公告)号：US4301014A
公开(公告)日：1981-11-17
申请号：US156539
申请日：1980-06-05
CPC分类号： B01D53/8606 , C02F1/5236 , C02F9/00 , Y10S210/906
摘要： The process disclosed in this invention takes the waste solids, gases, and water from a phosphorus pentasulfide manufacturing facility and hydrolyzes the phosphorus pentasulfide by heating. The phosphorus portion is converted to a soluble phosphate and the sulfur portion to a mixture of sulfide, sulfite and sulfate. The soluble fraction is then treated with a calcium hydroxide solution precipitating the phosphate and sulfates which are removed. The gaseous portion of the hydrolysis is fed to a catalytic oxidizer which converts the sulfides to sulfur, which is removed and the gas, free of sulfur containing species, is exhausted to the atmosphere. The filtrate from the precipitation reaction can be recycled to the plant, or may be chlorinated and discharged.
摘要翻译： 本发明公开的方法从五硫化硫制造设备中取出废固体，气体和水，并通过加热水解五硫化二磷。 将磷部分转化为可溶性磷酸盐，将硫部分转化为硫化物，亚硫酸盐和硫酸盐的混合物。 然后用氢氧化钙溶液处理可溶性级分，沉淀除去的磷酸盐和硫酸盐。 将水解的气体部分进料到催化氧化剂中，催化氧化剂将硫化物转化为硫，其被除去，并且不含硫的物质的气体被排放到大气中。 来自沉淀反应的滤液可以再循环到植物中，或者可以进行氯化和排出。
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