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    • 24. 发明授权
    • Process for making 90 K superconductors
    • 制造90 K超导体的工艺
    • US5036043A
    • 1991-07-30
    • US529752
    • 1990-05-24
    • Munirpallam A. Subramanian
    • Munirpallam A. Subramanian
    • H01L39/24
    • H01L39/2419Y10S505/739Y10S505/78
    • There is disclosed an improved process for preparing a superconducting composition having the formula MBa.sub.2 Cu.sub.3 O.sub.x wherein M is selected from the group consisting of Y, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu; x is from about 6.5 to about 7.0; said composition having a superconducting transition essentially of mixing M.sub.2 O.sub.3, BaO.sub.2 and CuO in an atomic ratio of M:Ba:Cu of about 1:2:3 to obtain a powder mixture; heating the resulting mixture in an oxygen-containing atmosphere at a temperature from about 850.degree. C. to about 925.degree. C. for a time sufficient to form MBa.sub.2 Cu.sub.3 O.sub.y, where y is from about 6.0 to about 6.4; and maintaining the MBa.sub.2 Cu.sub.3 O.sub.y in an oxygen-containing atmosphere while cooling for a time sufficient to obtain the desired product.
    • 公开了一种制备具有式MBa2Cu3Ox的超导组合物的改进方法,其中M选自Y,Nd,Sm,Eu,Gd,Dy,Ho,Er,Tm,Yb和Lu; x为约6.5至约7.0; 所述组合物具有基本上将M:Ba:Cu原子比为1:2:3的M2O3,BaO2和CuO混合的超导转变,得到粉末混合物; 将所得混合物在约850℃至约925℃的含氧气氛中加热足够的时间以形成MBa2Cu3Oy,其中y为约6.0至约6.4; 并将MBa2Cu3Oy保持在含氧气氛中,同时冷却足以获得所需产物的时间。
    • 27. 发明授权
    • Processes for the preparation of 2-chloro-1,1,1,2,3,3,3-heptafluoropropane, hexafluoropropene and 1,1,1,2,3,3,3-heptafluoropropane
    • 制备2-氯-1,1,1,2,3,3,3-七氟丙烷,六氟丙烯和1,1,1,2,3,3,3-七氟丙烷的方法
    • US07129383B2
    • 2006-10-31
    • US10523223
    • 2003-08-21
    • Mario J. NappaVelliyur Nott Mallikarjuna RaoH. David RosenfeldSekhar SubramoneyMunirpallam A. SubramanianAllen C. Sievert
    • Mario J. NappaVelliyur Nott Mallikarjuna RaoH. David RosenfeldSekhar SubramoneyMunirpallam A. SubramanianAllen C. Sievert
    • C07C17/00C07C17/266C07C17/10
    • C07C19/08B01J23/26B01J23/866B01J35/002B01J37/0236B01J37/03B01J37/26C07C17/206C07C17/21C07C17/23C07C17/25C07C19/10C07C21/18
    • A process for the preparation of 2-chloro-1,1,1,3,3,3-heptafluoropropane is disclosed which involves (a) contacting a mixture comprising hydrogen fluoride, chlorine, and at least one starting material selected from the group consisting of halopropenes of the formula CX3CCI═CX2 and halopropanes of the formula the CX3CCIYCX3, wherein each X is independently F or Cl, and Y is H, Cl or F (provided that the number of X and Y which are F totals no more than six) with a chlorofluorination catalyst in a reaction zone to produce a product mixture comprising CF3CCIFCF3, HCI, HF. and underfluorinated halogenated hydrocarbon intermediates. The process is characterized by said chlorofluorination catalyst comprising at least one chromium-containing component selected from (i) a crystalline alpha-chromium oxide where at least 0.05 atom % of the chromium atoms in the alpha-chromium oxide lattice are replaced by nickel, trivalent cobalt or both nickel and trivalent cobalt, provided that no more than 2 atom % of the chromium atoms in the alpha-chromium oxide lattice are replaced by nickel and that the total amount of chromium atoms in the alpha-chromium oxide lattice that are replaced by nickel and trivalent cobalt is no more than 6 atom %, and (ii) a fluorinated crystalline oxide of (i). Also disclosed is a process for the manufacture of a mixture of HFC-227ea and hexafluoropropene by reacting a starting mixture comprising CFC-217ba and hydrogen in the vapor phase at an elevated temperature, optionally in the presence of a hydrogenation catalyst. This process involves preparing the CFC-217ba by the process described above.
    • 公开了一种制备2-氯-1,1,1,3,3,3-七氟丙烷的方法,其涉及(a)使包含氟化氢,氯和至少一种起始原料的混合物接触,所述起始材料选自 的式CX3CCI-CX2的卤代丙烯和式CX3CCIYCX3的卤代丙烷,其中每个X独立地为F或Cl,Y为H,Cl或F(条件是总计X不超过6的X和Y的数目 )与反应区中的氯氟化催化剂反应以产生包含CF 3 CClF 3,HCl,HF的产物混合物。 和不完全氟化的卤代烃中间体。 该方法的特征在于所述氯氟化催化剂包含至少一种含铬组分,其选自(i)α-氧化铬晶格中至少0.05原子%的铬原子被镍取代的结晶α-氧化铬,三价 钴或镍和三价钴,条件是α-铬氧化物晶格中不超过2原子%的铬原子被镍代替,并且α-氧化铬晶格中的铬原子的总量被 镍和三价钴不超过6原子%,和(ii)(i)的氟化结晶氧化物。 还公开了通过在升高的温度下,任选地在氢化催化剂存在下,使包含CFC-217ba和氢的起始混合物在气相中反应制备HFC-227ea和六氟丙烯的混合物的方法。 该方法包括通过上述方法制备CFC-217ba。
    • 30. 发明授权
    • Fluorinated benzene manufacturing process
    • 氟化苯制造工艺
    • US6087543A
    • 2000-07-11
    • US360977
    • 1999-07-27
    • Munirpallam A. Subramanian
    • Munirpallam A. Subramanian
    • C07C17/20
    • C07C17/208
    • A process is disclosed for producing fluorinated benzene. The process involves (a) contacting chlorobenzene starting material with a metal fluoride composition of the formula (AgF)(MF.sub.2).sub.x (where M is Mn, Fe, Co, Ni, Cu, Zn or a mixture thereof and x is a number between 0 and 1) at a temperature above 175.degree. C. sufficient to remove the chlorine substituent from the starting material and to transfer F from the metal fluoride composition to the starting material (thereby producing a reduced metal fluoride composition comprising a silver component of the formula AgF.sub.1-y where y is a number from 0.01 to 1); (b) oxidizing the reduced metal fluoride composition from (a) in the presence of HF to regenerate the metal fluoride mixture composition of the formula (AgF)(MF.sub.2).sub.x ; and (c) recycling regenerated metal fluoride composition of (b) to (a).
    • 公开了生产氟化苯的方法。 该方法包括(a)使氯苯原料与式(AgF)(MF 2)x(其中M是Mn,Fe,Co,Ni,Cu,Zn或其混合物)的金属氟化物组合物接触,x是 0和1)在高于175℃的温度下,足以从原料中除去氯取代基并将F从金属氟化物组合物转移到原料(由此制备还原的金属氟化物组合物,其包含式 AgF1-y,其中y是0.01至1的数); (b)在HF存在下使(a)的还原金属氟化物组合物氧化以再生式(AgF)(MF 2)x的金属氟化物混合物组合物; (c)回收(b)〜(a)的再生金属氟化物组合物。