Patents by Inventor Alessandro Ginnasi

Alessandro Ginnasi 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 of selective separation of hydrogen sulfide from gaseous mixtures containing also carbon dioxide
    Patent number: 4545965
    Abstract: There is disclosed a process for selectively separating hydrogen sulfide from gaseous mixtures which also contain carbon dioxide by chemical absorption with a substantially anhydrous solution of a tertiary amine, such as methyl diethanolamine, and an auxiliary organic solvent, such as sulfolane.
    Type: Grant
    Filed: April 23, 1984
    Date of Patent: October 8, 1985
    Assignee: Snamprogetti, S.p.A.
    Inventors: Luigi Gazzi, Carlo Rescalli, Maria A. Scaramucci, Alessandro Ginnasi
  • Cryogenic process for fractionally removing acidic gases from gas mixtures
    Patent number: 4529424
    Abstract: A process is described for stripping acidic gases, mainly hydrogen sulphide and carbon dioxide, from natural gas or synthesis gas, especially when the percentages of such acidic gases are high and the conventional processes become economically objectionable.The process is based on the use of a number of selective solvents, generally belonging to the class of esters, ethers, mixed ester-ethers and lactones, in combination with sequential absorbing cycles which start from the stripping of hydrogen sulphide, and comprise the regeneration of the solvents used by several expansion cycles: H.sub.2 S and CO.sub.2 are recovered and the regenerated solvents recycled.
    Type: Grant
    Filed: June 29, 1982
    Date of Patent: July 16, 1985
    Assignee: Snamprogetti, S.p.A.
    Inventors: Luigi Gazzi, Giancarlo Cotone, Gianfranco Soldati, Alessandro Ginnasi, Alessandro Vetere, Carlo Rescalli
  • Cryogenic process for removing acidic gases from gas mixtures
    Patent number: 4514203
    Abstract: Low temperature treatments are combined with solvent treatments using particularly selective solvents for stripping acidic gases such as carbon dioxide and hydrogen sulphide from natural gas or from synthetic gases.The preferred solvents are a wide range of compounds having an esteric or an etheric function in their molecule, but there are also examples of compounds which have the two functions simultaneously.The stripping process is comparatively simple, is efficient, especially for high contents of acidic gases in the raw gas streams, and is economically acceptable.
    Type: Grant
    Filed: June 23, 1982
    Date of Patent: April 30, 1985
    Assignee: Snamprogetti, S.p.A.
    Inventors: Luigi Gazzi, Giancarlo Cotone, Gianfraco Soldati, Alessandro Ginnasi, Alessandro Vetere, Carlo Rescalli
  • Process for separating butadiene from C.sub.4 hydrocarbons streams obtained by stream-cracking
    Patent number: 4020114
    Abstract: The present invention is directed to a process for the separation of butadiene from a stream-cracked C.sub.4 hydrocarbon stream by a sequential etherification of isobutylene and the acetylenic compounds that is followed by a distillation step.
    Type: Grant
    Filed: May 21, 1975
    Date of Patent: April 26, 1977
    Assignee: Snam Progetti S.p.A.
    Inventors: Carlo Rescalli, Alessandro Ginnasi
  • Extractive distillation of a dimethyl carbonate feed with water
    Patent number: 3963586
    Abstract: Dimethyl carbonate is separated from a mixture thereof with methyl alcohol and water through an extractive distillation process wherein water is utilized as the solvent.
    Type: Grant
    Filed: October 25, 1974
    Date of Patent: June 15, 1976
    Assignee: Snam Progetti S.p.A.
    Inventors: Alessandro Ginnasi, Giovanni Passoni
  • Process for separating a high purity vinyl aromatic hydrocarbon from hydrocarbon mixtures containing the same
    Patent number: 3953300
    Abstract: Styrene of exceptional purity is separated from a mixture of hydrocarbons including it, xylenes, saturated and olefinic hydrocarbons and ethyl benzene by means of a two-step extractive distillation process through the use of a high boiling polar solvent such as N-formyl morpholine in admixture with an amount of water in the range of from 1% to 30% by weight.
    Type: Grant
    Filed: July 11, 1975
    Date of Patent: April 27, 1976
    Assignee: Snam Progetti, S.p.A.
    Inventors: Alessandro Ginnasi, Alessandro Vetere, Pierantonio Martera