Patents by Inventor Cristina Maretto

Cristina Maretto 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: 7820727
    Abstract: Process for the running of a reactor in which reactions take place in multiphase systems, wherein a gaseous phase prevalently consisting of CO and H2 is bubbled into a suspension of a solid in the form of particles (catalyst) in a liquid (prevalently reaction product), according to the Fischer-Tropsch technology.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: October 26, 2010
    Assignees: ENI S.p.A., Institut Francais du Petrole, Enitecnologie S.p.A.
    Inventors: Cristina Maretto, Giovanni Pederzani
  • Patent number: 7579382
    Abstract: Process for the charging of a catalyst and for the running of a reactor in which reactions take place in multiphase systems, wherein a gaseous phase prevalently consisting of CO and H2 is bubbled into a suspension of a solid in the form of particles (catalyst) in a liquid (prevalently reaction product), according to the Fischer-Tropsch technology.
    Type: Grant
    Filed: September 17, 2004
    Date of Patent: August 25, 2009
    Assignees: ENI S.p.A., Institut Francais du Petrole, Enitecnologie S.p.A.
    Inventors: Cristina Maretto, Giovanni Pederzani
  • Publication number: 20090197980
    Abstract: Process for the running of a reactor in which reactions take place in multiphase systems, wherein a gaseous phase prevalently consisting of CO and H2 is bubbled into a suspension of a solid in the form of particles (catalyst) in a liquid (prevalently reaction product), according to the Fischer-Tropsch technology.
    Type: Application
    Filed: February 13, 2009
    Publication date: August 6, 2009
    Applicants: ENI S.P.A., INSTITUT FRANCAIS DU PETROLE, ENITECNOLOGIE S.p.A.
    Inventors: Cristina Maretto, Giovanni Pederzani
  • Patent number: 7550515
    Abstract: Process for the running of a reactor in which reactions take place in multiphase systems, wherein a gaseous phase prevalently consisting of CO and H2 is bubbled into a suspension of a solid in the form of particles (catalyst) in a liquid (prevalently reaction product), according to the Fischer-Tropsch technology.
    Type: Grant
    Filed: September 17, 2004
    Date of Patent: June 23, 2009
    Assignees: ENI S.p.A., Institut Francais du Petrole, Enitecnologie S.p.A.
    Inventors: Cristina Maretto, Giovanni Pederzani
  • Publication number: 20070135527
    Abstract: Process for the running of a reactor in which reactions take place in multiphase systems, wherein a gaseous phase prevalently consisting of CO and H2 is bubbled into a suspension of a solid in the form of particles (catalyst) in a liquid (prevalently reaction product), according to the Fischer-Tropsch technology.
    Type: Application
    Filed: September 17, 2004
    Publication date: June 14, 2007
    Applicants: ENI S.p.A, INSTITUT FRANCAIS DU PETROLE, ENITECNOLOGIE S.p.A.
    Inventors: Cristina Maretto, Giovanni Pederzani
  • Publication number: 20070066690
    Abstract: Process for the charging of a catalyst and for the running of a reactor in which reactions take place in multiphase systems, wherein a gaseous phase prevalently consisting of CO and H2 is bubbled into a suspension of a solid in the form of particles (catalyst) in a liquid (prevalently reaction product), according to the Fischer-Tropsch technology.
    Type: Application
    Filed: September 17, 2004
    Publication date: March 22, 2007
    Applicants: ENI S.p.A., INSTITUT FRANCAIS DU PETRROLE, ENITECHNOLOGIE S.p.A.
    Inventors: Cristina Maretto, Giovanni Pederzani
  • Patent number: 6825237
    Abstract: A process for synthesising hydrocarbons by reacting a mixture comprising at least carbon monoxide and hydrogen in the presence of a catalyst is carried out in a three-phase reactor in which the liquid Peclet number is in the range 0 (excluded) to about 10, with a superficial gas velocity Ug that is preferably less than 35 cm.s−1, to encourage gas transfer into the liquid phase and avoid too much attrition of the catalyst grains.
    Type: Grant
    Filed: September 26, 2002
    Date of Patent: November 30, 2004
    Assignees: Institut Francais DuPetrole, AGIP Petroli S.p.A., ENI S.p.A.
    Inventors: Jean-Marc Schweitzer, Pierre Galtier, Francois Hugues, Cristina Maretto
  • Patent number: 6700030
    Abstract: A process for converting hydrocarbons in the presence of a catalyst is described that is carried out in a three-phase reactor in which the liquid Peclet number is in the range 0 (excluded) to about 10, with a superficial gas velocity Ug that is preferably less than 35 cm.s−1, to encourage gas transfer into the liquid phase and avoid too much attrition of the catalyst grains.
    Type: Grant
    Filed: September 26, 2002
    Date of Patent: March 2, 2004
    Assignee: Institut Francais du Petrole
    Inventors: Jean-Marc Schweitzer, Pierre Galtier, Francois Hugues, Cristina Maretto
  • Publication number: 20030109590
    Abstract: A process for synthesising hydrocarbons by reacting a mixture comprising at least carbon monoxide and hydrogen in the presence of a catalyst is carried out in a three-phase reactor in which the liquid Peclet number is in the range 0 (excluded) to about 10, with a superficial gas velocity Ug that is preferably less than 35 cm.s−1, to encourage gas transfer into the liquid phase and avoid too much attrition of the catalyst grains.
    Type: Application
    Filed: September 26, 2002
    Publication date: June 12, 2003
    Inventors: Jean-Marc Schweitzer, Pierre Galtier, Francois Hugues, Cristina Maretto
  • Publication number: 20030105371
    Abstract: The invention concerns a method for converting hydrocarbons in the presence of a catalyst carried out in a three-phase reactor and wherein the liquid Peclet number ranges between 0 (excluded) and about 10, and the gas surface speed Ug is preferably less than 35 sm.s−1, so as to promote the transfer, of gas into the liquid phase and avoid too much attrition of the catalyst grains.
    Type: Application
    Filed: September 26, 2002
    Publication date: June 5, 2003
    Inventors: Jean-Marc Schweitzer, Pierre Galtier, Francois Hugues, Cristina Maretto
  • Patent number: 6348510
    Abstract: Optimized process for effecting the production of heavy hydrocarbons according to the Fischer-Tropsch method which comprises: (a) feeding the reagent gases into a reactor; (b) at least partially recovering the heavy hydrocarbons formed in step (a) by their external or internal separation from the catalytic particles; the above process being characterized in that in step (a) the reaction takes place: (1) in t he presence of solid particles which have a particle Reynolds number (Rep) greater than 0.1, (2) keeping the solid particles suspended at a height H, with Us, Ul, and Ug value s which are such as to have a Bodenstein number Bos≦1, preferably ≦0.4.
    Type: Grant
    Filed: June 16, 2000
    Date of Patent: February 19, 2002
    Assignees: ENI S.p.A., AGIP Petroli S.p.A., Institut Francais du Petrole, Enitecnologie S.p.A.
    Inventors: Cristina Maretto, Vincenzo Piccolo, Jean-Christophe Viguie, Gilles Ferschneider
  • Patent number: 6162754
    Abstract: Continuous process for the production of prevalently heavy hydrocarbons starting from synthesis gas in the presence of a gas phase, a liquid and a solid catalyst, the above process being carried out using a bubble column, characterized in that the bubble column internally has: (a) at least one draft-tube; (b) at least one device for the inlet of the synthesis gas; (c) at least one device for the inlet of the regenerating gas; (d) at least one device for activating/interrupting the stream of regenerating gas; (e) optional devices suitable for minimizing the mixing of the synthesis gas with the regenerating gas.
    Type: Grant
    Filed: March 18, 1999
    Date of Patent: December 19, 2000
    Assignees: Agip Petroli S.p.A., ENI S.p.A., Institut Francais du Petrole
    Inventors: Cristina Maretto, Vincenzo Piccolo, Dominique Casanave, Pierre Galtier
  • Patent number: 5827902
    Abstract: Process for the optimum operation of a slurry bubble column reactor in the presence of a gas phase and a liquid phase, particularly for the Fischer-Tropsch reaction, characterized in that:1) the process is carried out in a number of stages in series of .gtoreq.2;2) the flow conditions of the gas phase and liquid phase containing the solids are essentially plug flow conditions, with a gas rate of between 3 cm/s and 200 cm/s and a liquid rate of between 0 and 10 cm/s;3) the concentration of solids in each stage is essentially constant and equal for each single stage, and is between 5 and 50% (vol./vol.).
    Type: Grant
    Filed: August 6, 1997
    Date of Patent: October 27, 1998
    Assignees: AGIP Petroli S.p.A., AGIP S.p.A., Institut Francais du Petrole
    Inventors: Cristina Maretto, Vincenzo Piccolo