Patents by Inventor Gianni Torreggiani

Gianni Torreggiani 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).

  • Patent number: 4169856
    Abstract: A process for the preparation of ethanolamines includes passing ammonia in counter-flow with water and a recycled ammoniacal solution through an absorption column provided with internally cooled bubbling-trays to obtain an ammoniacal solution containing from 20 to 50% by weight of ammonia, reacting the ammoniacal solution with ethylene oxide firstly in an isothermal reactor and then in an adiabatic reactor to obtain substantially complete conversion of the ethylene oxide to ethanolamines, removing by means of a desorption column and recycling unreacted ammonia and part of the water from the reaction product, evaporating a greater part of the remaining water in an evaporator and dehydrating the ethanolamines at low pressure.
    Type: Grant
    Filed: September 18, 1978
    Date of Patent: October 2, 1979
    Assignee: Euteco S.p.A.
    Inventors: Gioacchino Cocuzza, Gianni Torreggiani
  • Patent number: 4033617
    Abstract: Crude ethylene oxide present in the dilute aqueous solution resulting from the extraction with an aqueous solvent of ethylene oxide from the gaseous stream obtained by catalytic oxidation of ethylene is purified by desorption, liquefaction, distillation in a fractionating column and final desorption treatment to remove absorbed non-condensable gases. The fractionating column is heated by condensation of the water vapor evolved during desorption and a liquid stream of ethylene oxide rich in acetaldehyde is discharged from the bottom, treated to convert a fraction of said acetaldehyde into high-boiling products, distilled to remove the latter as bottoms and returned to the fractionating column.
    Type: Grant
    Filed: July 8, 1976
    Date of Patent: July 5, 1977
    Assignee: Societa' Italiana Resine S.I.R. S.p.A.
    Inventors: Gioacchino Cocuzza, Gianni Torreggiani, Michele Sfregola
  • Patent number: 3948621
    Abstract: Process for the simultaneous separation of ethylene oxide and carbon dioxide from the gaseous mixtures obtained in the direct oxidation of ethylene with oxygen, comprisingA. cooling the gaseous mixture containing ethylene oxide, unreacted ethylene, water vapour, carbon dioxide and inert gases after addition of methanol to a temperature such that the water vapour present separates in the form of an aqueous methanol solution;B. washing the obtained gaseous mixture in an absorption zone with methanol, the methanol being fed into the intermediate part of the absorption zone as a main methanol stream and into the upper part as a secondary methanol stream, maintaining the temperature of the secondary methanol stream at least about lower than that of the main methanol stream and removing from the upper part a gaseous mixture being practically free of ethylene oxide and containing carbon dioxide and ethylene and from the lower part of the absorption zone a solution of ethylene oxide in methanol; andC.
    Type: Grant
    Filed: December 26, 1973
    Date of Patent: April 6, 1976
    Assignee: Societa' Italiana Resine S.p.A.
    Inventors: Gioacchino Cocuzza, Benedetto Calcagno, Gianni Torreggiani
  • Patent number: 3935279
    Abstract: A process for the production of ethylene glycol ethers by reacting ethylene oxide with monofunctional aliphatic alcohols, which comprisesReacting a monofunctional aliphatic alcohol and ethylene oxide in a first reaction stage in a molar ratio of from about 3:1 to 20:1;Separating excess alcohol from the ethylene glycol ethers obtained as the reaction products in the first stage;Reacting the ethylene glycol ethers with ethylene oxide in a molar ratio of from about 1:1 to 10:1 and with monoethylene glycol ether in a second reaction stage;Separating the monoethylene glycol ether and the diethylene glycol ether from the reaction products of the second stage, maintaining a weight ratio of the discharged fraction to the recycled fraction of from about 0.5:1 to 5:1.The reaction is carried out under abiabatic conditions in the first stage and under isothermal conditions in the second stage.
    Type: Grant
    Filed: December 26, 1973
    Date of Patent: January 27, 1976
    Assignee: Societa'Italiana Resine S.I.R. S.p.A.
    Inventors: Gioacchino Cocuzza, Benedetto Calcagno, Gianni Torreggiani