Plural Chalcogens Bonded Directly To The Metal Patents (Class 556/89)
At least one of the chalcogens is part of a -c(=x)x- group, wherein the x's are the same or diverse chalcogens (Class 556/90)
Having -c(=x)x-, are the same or diverse chalcogens, attached indirectly to the metal by nonionic bonding (e.g., dialkyl tin thioglycollic acid esters, etc.) (Class 556/93)
  • Process for producing high purity metallic compound
    Patent number: 4650895
    Abstract: High purity organometallic compounds can be obtained by the process which comprises subjecting an organometallic compound in a liquid state under stirring to preliminary oxidation or hydrolysis in a proportion of about 0.1 to 50% by weight of the organometallic compound to form solid reaction products, and separating by distillation the unreacted organometallic compound from the solid reaction products to recover the purified organometallic compound; and high purity metallic compounds such as a solid metallic hydroxide or oxide can be obtained by the process which comprises following the process as mentioned above, oxidizing or hydrolyzing completely the recovered purified organometallic compound.
    Type: Grant
    Filed: January 30, 1984
    Date of Patent: March 17, 1987
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hidekimi Kadokura, Hiroshi Umezaki, Yoshihiro Higuchi