Patents Represented by Attorney, Agent or Law Firm Ben P. Patel
-
Patent number: 6380418Abstract: A method and catalyst system for producing aromatic carbonates from aromatic hydroxy compounds. In one embodiment, the method includes the step of contacting at least one aromatic hydroxy compound with oxygen and carbon monoxide in the presence of a carbonylation catalyst system having an effective amount of a manganese source in the absence of a Group VIII B metal source. In various alternative embodiments, the carbonylation catalyst system can include at least one inorganic co-catalyst, as well as a halide composition and/or a base.Type: GrantFiled: November 27, 2000Date of Patent: April 30, 2002Assignee: General Electric CompanyInventors: Ben Purushotam Patel, Grigorii Lev Soloveichik, Donald Wayne Whisenhunt, Jr., Kirill Vladimirovich Shalyaev
-
Patent number: 6380417Abstract: A method and catalyst system for economically producing aromatic carbonates from aromatic hydroxy compounds. In one embodiment, the present invention provides a method of carbonylating aromatic hydroxy compounds by contacting at least one aromatic hydroxy compound with oxygen and carbon monoxide in the presence of a carbonylation catalyst system that includes a catalytic amount of a combination of inorganic co-catalysts containing manganese and nickel; manganese and iron; manganese and chromium; manganese and cerium; manganese and europium; manganese, cerium, and europium; manganese, iron, and europium; or manganese and thorium. In various alternative embodiments, the carbonylation catalyst system can include an effective amount of a palladium source and an effective amount of a halide composition. Further alternative embodiments can include catalytic amounts of various other inorganic co-catalyst combinations.Type: GrantFiled: September 15, 2000Date of Patent: April 30, 2002Assignee: General Electric CompanyInventors: James Lawrence Spivack, Donald Wayne Whisenhunt, Jr., James Norman Cawse, Bruce Fletcher Johnson, Grigorii Lev Soloveichik, John Yaw Ofori, Eric James Pressman
-
Patent number: 6376640Abstract: This invention provides a method for preparing polycarbonates, which utilizes polycondensation catalysts of the formula Cs+An−, wherein An− represents anions such as CH3SO3−, NH2SO3−, C2H2O4−, BF4−, B(C6H5CH3)4−, and CH3C6H4SO3−. We have found that this new class of catalysts provides excellent polymerization rates for the preparation of Bisphenol A polycarbonate from the melt polymerization of diphenyl carbonate and Bisphenol A. Moreover, the catalysts of the invention were found to be very selective in substantially reducing the level of branching side reaction, i.e., formation of Fries product, normally associated with the melt polycarbonate process.Type: GrantFiled: January 12, 2001Date of Patent: April 23, 2002Assignee: General Electric CompanyInventors: John Patrick Lemmon, Patrick Joseph McCloskey, Oltea Puica Siclovan
-
Patent number: 6372683Abstract: A method and catalyst system for producing aromatic carbonates from aromatic hydroxy compounds. In one embodiment, the method includes the step of contacting at least one aromatic hydroxy compound with oxygen and carbon monoxide in the presence of a carbonylation catalyst system having catalytic amounts of the following components: a Group VIII B metal source; a combination of inorganic co-catalysts including a copper source and at least one of a titanium source or a zirconium source; an onium chloride composition; and a base. Alternative embodiments include inorganic co-catalyst combinations of a lead source and at least one of a titanium source or a manganese source.Type: GrantFiled: January 10, 2001Date of Patent: April 16, 2002Assignee: General Electric CompanyInventors: Kirill Vladimirovich Shalyaev, Grigorii Lev Soloveichik, Bruce Fletcher Johnson, Donald Wayne Whisenhunt, Jr.
-
Patent number: 6372002Abstract: A functionalized diamond comprises an organic functionalized moiety. The organic functionalized moiety being selected from: vinyl, amide, alcohol, acidics, phenolics, hydroxyls, carboxyl, aldehyde, and aliphatics, and combinations thereof.Type: GrantFiled: May 23, 2000Date of Patent: April 16, 2002Assignee: General Electric CompanyInventors: Mark Philip D'Evelyn, James Michael McHale, Jr.
-
Patent number: 6365538Abstract: A method and catalyst system for producing aromatic carbonates from aromatic hydroxy compounds. In one embodiment, the method includes the step of contacting at least one aromatic hydroxy compound with oxygen and carbon monoxide in the presence of a carbonylation catalyst system having catalytic amounts of the following components: a Group VIII B metal source; an alkaline metal chloride; a polyether; and a base. Alternative embodiments substitute a catalytic amount of a nitrile promoter for the polyether.Type: GrantFiled: January 31, 2000Date of Patent: April 2, 2002Assignee: General Electric CompanyInventors: Kirill Vladimirovich Shalyaev, Grigorii Lev Soloveichik, Bruce Fletcher Johnson, Donald Wayne Whisenhunt, Jr.
-
Patent number: 6355824Abstract: A method and catalyst system for producing aromatic carbonates from aromatic hydroxy compounds. In one embodiment, the method includes the step of contacting at least one aromatic hydroxy compound with oxygen and carbon monoxide in the presence of a carbonylation catalyst system having an effective amount of an iron source in the absence of a Group VIII B metal source. In various alternative embodiments, the carbonylation catalyst system can include at least one inorganic co-catalyst, as well as a halide composition and/or a base.Type: GrantFiled: December 4, 2000Date of Patent: March 12, 2002Assignee: General Electric CompanyInventors: Ben Purushotam Patel, Grigorii Lev Soloveichik, Donald Wayne Whisenhunt, Jr., Kirill Vladimirovich Shalyaev
-
Patent number: 6355597Abstract: A catalyst system for economically producing aromatic carbonates from aromatic hydroxy compounds. In one embodiment, the present invention provides a carbonylation catalyst system that includes a catalytic amount of an inorganic co-catalyst containing bismuth. In various alternative embodiments, the carbonylation catalyst system can include an effective amount of a palladium source and an effective amount of a halide composition. Further alternative embodiments can include catalytic amounts of various inorganic co-catalyst combinations.Type: GrantFiled: April 27, 2000Date of Patent: March 12, 2002Assignee: General Electric CompanyInventors: James Lawrence Spivack, Donald Wayne Whisenhunt, Jr., James Norman Cawse, Bruce Fletcher Johnson, Kirill Shalyaev
-
Patent number: 6346500Abstract: Hydroxyaromatic compounds such as phenol are carbonylated with oxygen and carbon monoxide in the presence of a catalyst system comprising a Group VIII metal having an atomic number of at least 44, preferably palladium; an alkali metal or alkaline earth metal halide, preferably sodium bromide; and at least one aliphatic polyether such as a polyethylene glycol dimethyl ether or a crown ether. The catalyst system also preferably contains a compound of another metal, preferably lead.Type: GrantFiled: May 26, 2000Date of Patent: February 12, 2002Assignee: General Electric CompanyInventors: Eric James Pressman, Grigorii Lev Soloveichik, Kirill Vladimirovich Shalyaev, Bruce Fletcher Johnson
-
Patent number: 6323358Abstract: A method and catalyst system for producing aromatic carbonates from aromatic hydroxy compounds. In one embodiment, the method includes the step of contacting at least one aromatic hydroxy compound with oxygen and carbon monoxide in the presence of a carbonylation catalyst system having an effective amount of a cobalt source in the absence of a Group VIII B metal source. In various alternative embodiments, the carbonylation catalyst system can include at least one inorganic co-catalyst, as well as a halide composition and/or a base.Type: GrantFiled: September 20, 2000Date of Patent: November 27, 2001Assignee: General Electric CompanyInventors: Ben Purushotam Patel, Grigorii Lev Soloveichik, Donald Wayne Whisenhunt, Jr., Kirill Vladimirovich Shalyaev
-
Patent number: 6323304Abstract: This invention provides a method for preparing polycarbonates, which utilizes polycondensation catalysts of the formula Ax+MF6−x, wherein A is an alkali metal or alkaline earth cation; M is a transition metal of group IVA or VA, or M is a p-block metal of group IIIB, IVB or VB; and x is 1, 2, or 3. We have found that this new class of catalysts provide excellent polymerization rates for the preparation of Bisphenol A polycarbonate from the melt polymerization of diphenyl carbonate and Bisphenol A. Moreover, the catalysts of the invention were found to be very selective in substantially reducing the level of branching side reaction, i.e., formation of Fries product, normally associated with the melt polycarbonate process.Type: GrantFiled: January 12, 2001Date of Patent: November 27, 2001Assignee: General Electric CompanyInventors: John Patrick Lemmon, Patrick Joseph McCloskey, Oltea Puica Siclovan
-
Patent number: 6303737Abstract: This invention provides a method for preparing polycarbonates, which utilizes polycondensation catalysts which are salts of certain phenanthroline compounds. We have found that this new class of catalysts provide excellent polymerization rates for the preparation of Bisphenol A polycarbonate from the melt polymerization of diphenyl carbonate and Bisphenol A. Moreover, the catalysts of the invention were found to be very selective in substantially reducing the level of branching side reaction, i.e., formation of Fries product, normally associated with the melt polycarbonate process.Type: GrantFiled: January 12, 2001Date of Patent: October 16, 2001Assignee: General Electric CompanyInventors: John Patrick Lemmon, Patrick Joseph McCloskey, Ronald James Wroczynski