Patents by Inventor Liborio Casale

Liborio Casale has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for the preparation of tetrachloroterephthaloyl dichloride by means of the chlorination of terephthaloyl dichloride with gaseous chlorine
    Patent number: 4808345
    Abstract: The invention relates to a process for the preparation of tetrachloroterephthaloyl dichloride by means of the chlorination of terephthaloyl dichloride with gaseous chlorine, characterized in that said chlorination is carried out in the vapor phase in the presence of activated charcoal as catalyst. The invention relates also to the synthesis processes in which the compound prepared according to the process said is used as an intermediate.
    Type: Grant
    Filed: April 28, 1986
    Date of Patent: February 28, 1989
    Assignee: CAFFARO S.p.A. Societa per l'Industria Chimica ed Elettrochimica
    Inventors: Enrico Pontoglio, Sandro Parodi, Giuseppe Ghielmetti, Liborio Casale
  • Process for the continuous production of tetrachlorophthalo-nitrile in two reactors in series
    Patent number: 4572806
    Abstract: In an improved process for the continuous production of tetrachlorophthalonitrile, of the type with activated carbon fluidized bed reactor, under whose grid melted and atomized phthalonitrile, chlorine, hydrochloric acid and possibly nitrogen are simultaneously introduced the use of a second static bed reactor, also of activated carbon, in series with the first, is provided for, thereby greatly improving the life of the catalyzer, and, above all, the quality of the product.
    Type: Grant
    Filed: July 10, 1984
    Date of Patent: February 25, 1986
    Assignee: Caffaro S.p.A.
    Inventors: Giuseppe Ghielmetti, Liborio Casale, Giordano Donelli
  • Process for the continuous production of tetrachlorophthalonitrile in a fluidized bed reactor
    Patent number: 4485050
    Abstract: In an improved process of the continuous production of tetrachlorophthalonitrile, molten atomized phthalonitrile, chlorine, hydrochloric acid and possibly nitrogen are fed simultaneously below the grid of a reactor with a fluidized bed of activated carbon, and the tetrachlorophthalonitrile is separated and recovered continuously by simple cooling.
    Type: Grant
    Filed: May 13, 1983
    Date of Patent: November 27, 1984
    Assignee: Caffaro S.p.A.
    Inventors: Liborio Casale, Giordano Donelli
  • Method for preparation of inorganic flocculating composition
    Patent number: 4035259
    Abstract: The invention relates to an inorganic flocculating composition consisting of water soluble salts of Al, Fe, Mg and Ca and obtained by attacking clays containing the above chemical elements, the attack being carried out with an acid capable of forming water soluble salts of the said chemical elements. The said composition is capable of destroying the stability of colloidal slurries and can be employed without involving strict conditions, such as pH, temperature and so on.
    Type: Grant
    Filed: October 29, 1975
    Date of Patent: July 12, 1977
    Assignee: Caffaro, S.p.A., Societa per l'Industria Chimica ed Elettrochimica
    Inventor: Liborio Casale