Patents by Inventor Roberto Nasser

Roberto Nasser 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).

  • Optimized production of ketones/aldehydes
    Patent number: 8455696
    Abstract: Production of a ketone or aldehyde prepared by condensation is optimized by dehydration and hydrogenation of a starting acetone/ketone or aldehyde in a reaction zone and wherein water is partially eliminated from such reaction product by at least one membrane pervaporation module, the pervaporation module being fed tangentially and situated laterally to the reaction zone and operating in a loop, and wherein a fraction of reaction product exiting the reaction zone is thus partially dehydrated and recycling such dehydrated concentrate to the reaction zone.
    Type: Grant
    Filed: April 22, 2009
    Date of Patent: June 4, 2013
    Assignee: Rhodia Poliamida E Especialidades LTDA
    Inventors: Roberto Nasser, Dalva Janine Rita, Joël Schwartz
  • OPTIMIZED PRODUCTION OF KETONES/ALDEHYDES
    Publication number: 20110040128
    Abstract: Production of a ketone or aldehyde prepared by condensation is optimized by dehydration and hydrogenation of a starting acetone/ketone or aldehyde in a reaction zone and wherein water is partially eliminated from such reaction product by at least one membrane pervaporation module, the pervaporation module being fed tangentially and situated laterally to the reaction zone and operating in a loop, and wherein a fraction of reaction product exiting the reaction zone is thus partially dehydrated and recycling such dehydrated concentrate to the reaction zone.
    Type: Application
    Filed: April 22, 2009
    Publication date: February 17, 2011
    Inventors: Roberto Nasser, Dalva Janine Rita, Joël Schwartz
  • Use of surface-active agents in the impurity removal process from solutions containing acetic derivatives using nano-filtration with membranes, in a process to obtain cellulose acetate
    Patent number: 6673245
    Abstract: This invention refers to the use of surface-active agents as a treatment of effluents containing acetic derivatives by tangential filtration characterized from aqueous solutions containing between 20 and 35% in weight of acetic derivatives having been optionally decanted and filtered in a conventional manner in order to remove suspended impurities, which undergo the addition of one or more surface-active agents, while submitted to the tangential filtration process via polymer membranes, the cutting range of which may vary between 0.001 and 0.
    Type: Grant
    Filed: January 17, 2002
    Date of Patent: January 6, 2004
    Assignee: Rhodia Acetow Brasil LTDA
    Inventors: Roberto Nasser, Jr., Aires Iacovone
  • Use of surface-active agents in the impurity removal process from solutions containing acetic derivatives using nano-filtration with membrances, in a process to obtain cellulose acetate
    Publication number: 20020148768
    Abstract: This invention refers to the use of surface-active agents as a treatment of effluents containing acetic derivatives by tangential filtration characterized from aqueous solutions containing between 20 and 35% in weight of acetic derivatives having been optionally decanted and filtered in a conventional manner in order to remove suspended impurities, which undergo the addition of one or more surface-active agents, while submitted to the tangential filtration process via polymer membranes, the cutting range of which may vary between 0.001 and 0.
    Type: Application
    Filed: January 17, 2002
    Publication date: October 17, 2002
    Applicant: RHODIA ACETOW BRASIL LTDA
    Inventors: Roberto Nasser, Aires Iacovone