Patents by Inventor Grigore Pop

Grigore Pop 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 synthesis of silicoaluminophosphate molecular sieves
    Patent number: 6838586
    Abstract: The invention is directed to a method for making a silicoaluminophosphate (SAPO) molecular sieve from a reaction mixture comprising components present in amounts sufficient to form the SAPO, the reaction mixture having a first pH. The method comprises the steps of: adding an acid to the reaction mixture after the reaction mixture undergoes a change in pH from the first pH; and crystallizing the SAPO from the reaction mixture. The present invention is also directed to a silicoaluminophosphate molecular sieve made by this process.
    Type: Grant
    Filed: December 31, 2002
    Date of Patent: January 4, 2005
    Assignee: Exxon Mobil Chemical Patents Inc.
    Inventors: Machteld M. Mertens, Brita Engels, Ronald G. Searle, Grigore Pop, Irina Rodica Tamas, Rodica Ganea, Ruxandra Birjega
  • Catalytic process for the preparation of light olefins from methanol in fluidized bed reactor
    Patent number: 6710218
    Abstract: Methanol is converted in light molecular olefins C2-C4 with 93-100% degree of transformation and more than 90% selectivity in which more than 80% are ethylene and propylene upon a microspherical catalyst based on SAPO-34 zeolite, with continuous reaction-regeneration in a fluidized bed reactor-regenerator system. Ethylene/propylene ratio is changed in relatively large limits 0.69-1.36, by the modification of reaction temperature and space velocity of the feed.
    Type: Grant
    Filed: October 22, 2001
    Date of Patent: March 23, 2004
    Assignee: Casale Chemicals SA
    Inventors: Grigore Pop, Rodica Ganea, Doina Ivanescu, Rodica Boeru, Gheorghe Ignatescu, Ruxandra Birjega
  • Process for the synthesis of silicoaluminophosphate molecular sieves
    Publication number: 20030092951
    Abstract: The invention is directed to a method for making a silicoaluminophosphate (SAPO) molecular sieve from a reaction mixture comprising components present in amounts sufficient to form the SAPO, the reaction mixture having a first pH. The method comprises the steps of: adding an acid to the reaction mixture after the reaction mixture undergoes a change in pH from the first pH; and crystallizing the SAPO from the reaction mixture. The present invention is also directed to a silicoaluminophosphate molecular sieve made by this process.
    Type: Application
    Filed: December 31, 2002
    Publication date: May 15, 2003
    Inventors: Machteld M. Mertens, Brita Engels, Ronald G. Searle, Grigore Pop, Irina Rodica Tamas, Rodica Ganea, Ruxandra Birjega
  • Process for the synthesis of silicoaluminophosphate molecular sieves
    Patent number: 6514899
    Abstract: The invention is directed to a method for making a silicoaluminophosphate (SAPO) molecular sieve from a reaction mixture comprising components present in amounts sufficient to form the SAPO, the reaction mixture having a first pH. The method comprises the steps of: adding an acid to the reaction mixture after the reaction mixture undergoes a change in pH from the first pH; and crystallizing the SAPO from the reaction mixture. The present invention is also directed to a silicoaluminophosphate molecular sieve made by this process.
    Type: Grant
    Filed: October 2, 2000
    Date of Patent: February 4, 2003
    Assignee: ExxonMobil Chemical Patents, Inc.
    Inventors: Machteld M. Mertens, Brita Engels, Ronald G. Searle, Grigore Pop, Irina Rodica Tamas, Rodica Ganea, Ruxandra Birjega
  • Catalyst for the pyrolysis of hydrocarbons
    Patent number: 4361502
    Abstract: A catalyst, for the catalytic pyrolysis of hydrocarbons to olefins and diolefins at temperatures in the range of 600.degree.-750.degree. C. and pressures of 0.1 to 20 atmospheres, is a bifunctional synthetic modified mordenite zeolite of the formula (yH.zM.uNa) O.Al.sub.2 O.sub.3.SiO.sub.2 wherein M is Cu, Ag or Co/2 and u+y+z approach or equal 2. Good yields of ethylene and propylene are obtained from hydrocarbon feedstocks having boiling points up to 550.degree. C.
    Type: Grant
    Filed: March 30, 1979
    Date of Patent: November 30, 1982
    Assignee: Institutul de Inginerie Tehnologica Si Proiectari Pentru Industria Chimica - IITPIC
    Inventors: Grigore Pop, Gheorghe Ivanus, Silvia Boteanu, Pavel Tomi, Ecaterina Pop
  • Catalytic process for preparing olefins by hydrocarbon pyrolysis
    Patent number: 4172816
    Abstract: A process and catalyst for the catalytic pyrolysis of hydrocarbon to olefins and diolefins at temperatures in the range 600.degree.-750.degree. C. and pressures of 0.1 to 20 atmospheres. The catalyst is a bifunctional synthetic modified mordenite zeolite of the formula (yH.multidot.zM.multidot.uNa) O.multidot.Al.sub.2 O.sub.3 .multidot.SiO.sub.2 wherein M is Cu, Ag or Co/2 and u+y+z approach or equal 2. Good yields of ethylene and propylene are obtained from hydrocarbon feedstocks having boiling points up to 550.degree. C.
    Type: Grant
    Filed: December 6, 1977
    Date of Patent: October 30, 1979
    Assignee: Institutul de Inginerie Tehnologica si Proiectari Pentru Industria Chimica-Iitpic
    Inventors: Grigore Pop, Gheorghe Ivanus, Silvia Boteanu, Pavel Tomi, Ecaterina Pop