Vanadium, Niobium, Or Tantalum Containing (v, Nb, Or Ta) Patents (Class 556/42)
Carbon bonded directly to the metal (e.g., cyclopentadienyl vanadium tetracarbonyl, etc.) (Class 556/43)
The metal is bonded directly to x of a -c(=x)x- group, wherein the x's are the same or diverse chalcogens (e.g., vanadyl xanthate, etc.) (Class 556/44)
  • Preparation of organometalates
    Patent number: 4585883
    Abstract: Organometalates are prepared by the reaction, in a liquid reaction menstruum, between a soluble salt of an organic-containing cation and a heavy metal salt, e.g., silver salt, of a metalate to produce a soluble organometalate and a substantially insoluble heavy metal salt. The heavy metal salt of the metalate may be substantially insoluble in the reaction menstruum. The organometalates are useful to enhance the selectivity to monoalkylene glycols when provided in processes for the hydrolysis of alkylene oxides.
    Type: Grant
    Filed: March 28, 1984
    Date of Patent: April 29, 1986
    Assignee: Union Carbide Corporation
    Inventor: John R. Briggs
  • Homogeneous coordination compounds as oxidation catalysts
    Patent number: 4577042
    Abstract: A complex of a tetradentate tetraanionic ligand L of the formula: ##STR1## and a metal, preferably a transition metal, is described. The chelate and ring Z-CH-M-Z functional groups Z, such as N or O are resistant to oxidation and the ring contains 4 to 7 preferably 5 to 6 chain atoms. An osmium complex containing two pyridine ligands is an oxidation catalyst. Further activation by anodic oxidation and heating to a temperature exceeding 30.degree. C. greatly increases catalytic activity.
    Type: Grant
    Filed: March 17, 1983
    Date of Patent: March 18, 1986
    Assignee: California Institute of Technology
    Inventors: Terrence J. Collins, Fred C. Anson, Stephen L. Gipson, Terry E. Krafft