会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 1. 发明授权
    • Recovery of gadolinium and gallium oxides
    • 回收钆和氧化镓
    • US4375453A
    • 1983-03-01
    • US334719
    • 1981-12-28
    • David NalewajekEugene B. ReclaRobert A. WilesRichard E. Eibeck
    • David NalewajekEugene B. ReclaRobert A. WilesRichard E. Eibeck
    • C01F17/00C01G15/00
    • C01F17/0081C01F17/0012C01F17/0043C01G15/00C01P2004/61C01P2006/80
    • Gd.sub.2 O.sub.3 and Ga.sub.2 O.sub.3 are currently used for the fabrication of Gd.sub.3 Ga.sub.5 O.sub.12 (GGG) wafers which are employed as substrates for bubble domain memory devices. In the processing, in the order of 25% of the starting material ends up as process "saw kerf" contaminated with variable amounts of iron, nickel, magnesium, aluminum, zirconium, iridium and silicon. A process is described whereby the "saw kerf" can be reprocessed in sufficient purity to be re-used in the process, thereby improving the economics of production of GGG wafers significantly. Gadolinium and gallium oxides are recovered and separated from transition metal impurities introduced during fabrication of GGG wafers. The process "saw kerf" produced from slicing the crystal boule is dissolved in HCl, treated with H.sub.2 SO.sub.4, and the resulting sulfates separated. Metathesis with (NH.sub.4).sub.2 C.sub.2 O.sub.4 results in conversion of the sulfates to the ammonium oxalates which were calcined at 850.degree. C. to form Ga.sub.2 O.sub.3 and Gd.sub.2 O.sub.3 of purity >99.99%. The process can be extended to include purification and re-use of by-products generated in other grinding and polishing operations which may result in the recycling of the order of 80% of the generated by-products.
    • Gd2O3和Ga2O3目前用于制造用作气泡域记忆装置底物的Gd 3 Ga 5 O 12(GGG)晶片。 在加工过程中,以可变量的铁,镍,镁,铝,锆,铱和硅污染的工艺“锯切”为起始原料的25%。 描述了一种方法,其中“锯切”可以以足够的纯度重新加工以在该过程中重新使用,从而显着提高了GGG晶片的生产经济性。 钆和镓氧化物被回收并与制造GGG晶片期间引入的过渡金属杂质分离。 将从晶体棒上切下的方法“锯切”溶解在HCl中,用H 2 SO 4处理,所得到的硫酸盐分离。 (NH 4)2 C 2 O 4的复分解导致硫酸盐转化成草酸铵,其在850℃下煅烧以形成纯度> 99.99%的Ga 2 O 3和Gd 2 O 3。 该方法可以扩展到包括在其它研磨和抛光操作中产生的副产物的纯化和再利用,这可能导致生成的副产物的80%的量级的再循环。
    • 3. 发明授权
    • Polyoxyalkylene glycol refrigeration lubricants having pendant,
non-terminal perfluoroalkyl groups
    • 具有侧基,非末端全氟烷基的聚氧亚烷基二醇制冷润滑剂
    • US5100569A
    • 1992-03-31
    • US621163
    • 1990-11-30
    • David NalewajekRichard E. EibeckRaymond H. Thomas
    • David NalewajekRichard E. EibeckRaymond H. Thomas
    • C10M107/38C10M171/00
    • C10M171/008C10M107/38
    • The present invention provides a composition for use in refrigeration and air-conditioning comprising: (a) at least one refrigerant selected from the group consisting of hydrofluorocarbon, hydrochlorofluorocarbon, fluorocarbon, and chlorofluorocarbon; and (b) a sufficient amount to provide lubrication of at least one polyoxyalkylene glycol. The polyoxyalkylene glycol has at least one pendant non-terminal perfluorinated alkyl group on its hydrocarbon polymer backbone. The polyoxyalkylene glycol is terminated with a group selected from the group consisting of hydrogen, alkyl, and fluoroalkyl. The polyoxyalkylene glycol has a molecular weight of about 300 to about 4,000 and a viscosity of about 5 to about 300 centistokes at 37.degree. C. The polyoxyalkylene glycol is miscible in combination with the refrigerant in the range between about -40.degree. C. and at least about +20.degree. C.
    • 本发明提供一种用于制冷和空调的组合物,包括:(a)至少一种选自氢氟碳化合物,氢氯氟烃,氟碳化合物和氯氟烃的制冷剂; 和(b)足够的量以提供至少一种聚氧亚烷基二醇的润滑。 聚氧亚烷基二醇在其烃聚合物主链上具有至少一个侧链的非末端全氟化烷基。 聚氧亚烷基二醇用选自氢,烷基和氟代烷基的基团封端。 聚氧亚烷基二醇的分子量为约300至约4,000,在37℃下的粘度为约5至约300厘沲。聚氧亚烷基二醇可与制冷剂混合在约-40℃和 至少约+20℃
    • 6. 发明授权
    • Separation and recovery of molybdenum values from uranium process waste
    • 从铀工艺废物中分离和回收钼值
    • US4584184A
    • 1986-04-22
    • US612282
    • 1984-05-21
    • David NalewajekLynn E. McCurryDavid J. FriedlandRichard E. Eibeck
    • David NalewajekLynn E. McCurryDavid J. FriedlandRichard E. Eibeck
    • C01G39/00C01G39/02C01G43/00C01G43/01C22B7/00C22B34/34C22B60/02
    • C01G43/01C01G39/00C01G39/02C01G43/00C22B34/34C22B60/0247C22B7/008C01P2006/80Y02P10/234
    • A method for treating process waste consisting of uranium hexafluoride, UF.sub.6, molybdenum hexafluoride, MoF.sub.6 and molybdenum oxytetrafluoride, MoOF.sub.4 is provided wherein the foregoing mixture is hydrolyzed in an aqueous solution of ammonium carbonate and ammonium hydroxide. The resulting mother liquor is digested at 60.degree.-80.degree. C. to drive off carbon dioxide and convert the ammonium uranyl carbonate, (NH.sub.4).sub.4 UO.sub.2 (CO.sub.3).sub.3 to ammonium diuranate, (NH.sub.4).sub.2 U.sub.2 O.sub.7. The pH is maintained above 9 to prevent premature precipitation of the molybdenum values as molybdic acid or uranyl molybdate.The ammonium diuranate which forms as a yellow solid is filtered, slurried in aqueous ammonium hydroxide, filtered and dried. The yield is quantitative. Pyrolysis results in conversion of the diuranate salt to uranium oxide, U.sub.3 O.sub.8, of suitable purity to be recycled in the uranium hexafluoride production process. The combined filtrates which contain the molybdenum values and ammonium fluoride by-product are diluted, and stirred, with 95% ethanol to precipitate white, crystalline, ammonium molybdate, (NH.sub.4).sub.2 MoO.sub.4. The ammonium fluoride remains soluble. The ammonium molybdate is filtered, dried and calcined at 600.degree. C. for 2 hours to yield molybdenum trioxide, MoO.sub.3 in >90% yield and essentially free of uranium contamination. Fluoride contamination in either of the reprocessed materials is minimal.
    • 一种用于处理由六氟化铀,UF 6,六氟化钼,MoF 6和四氟化钼组成的处理废物的方法,其中上述混合物在碳酸铵和氢氧化铵的水溶液中水解。 将得到的母液在60°-80℃下消化以除去二氧化碳,并将碳酸铀酸铵(NH4)4UO2(CO3)3转化成二氢铀酸铵(NH4)2U2O7。 pH值保持在9以上,以防止钼值过早沉淀为钼酸或钼酸铀。 过滤形成黄色固体的二异氰酸铵,在氢氧化铵水溶液中浆化,过滤并干燥。 产量是定量的。 热解导致将二铀酸盐转化为具有合适纯度的氧化铀U3O8,以在六氟化铀生产过程中再循环。 将含有钼值和氟化铵副产物的合并滤液稀释,并用95%乙醇搅拌,沉淀出白色,结晶,钼酸铵(NH 4)2 OO 4。 氟化铵保持溶解。 将钼酸铵过滤,干燥并在600℃下煅烧2小时,得到三氧化钼,MoO 3> 90%产率,基本上不含铀污染物。 任何一种后处理材料中的氟化物污染最小。