Patents by Inventor Karina Quetzaly Almeida Leñero

Karina Quetzaly Almeida Leñero 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 preparing ethylene glycol
    Patent number: 7511178
    Abstract: The invention provides a process of preparing glycolaldehyde by reacting formaldehyde with hydrogen and carbon monoxide in the presence of a catalyst composition which is based on, a) a source of rhodium, and b) a ligand of general formula R1P—R2(I), wherein R1 is a bivalent radical that together with the phosphorous atom to which it is attached is an optionally substituted 2-phospha-tricyclo[3.3.1.1{3,7}]-decyl group, wherein from 1 to 5 of the carbon atoms has been replaced by a heteroatom, and wherein R2 is a monovalent radical which is an optionally substituted hydrocarbyl group having from 1 to 40 carbon atoms; a catalyst composition of use in said process; and a process of preparing ethylene glycol from the glycolaldehyde thus prepared.
    Type: Grant
    Filed: September 10, 2008
    Date of Patent: March 31, 2009
    Assignee: Shell Oil Company
    Inventors: Karina Quetzaly Almeida Leñero, Eit Drent, Roelof Van Ginkel, Robert Ian Pugh
  • Process of Preparing Glycolaldehyde
    Publication number: 20090012333
    Abstract: The invention provides a process of preparing glycolaldehyde by reacting formaldehyde with hydrogen and carbon monoxide in the presence of a catalyst composition which is based on, a) a source of rhodium, and b) a ligand of general formula R1P—R2(I), wherein R1 is a bivalent radical that together with the phosphorous atom to which it is attached is an optionally substituted 2-phospha-tricyclo[3.3.1.1{3,7}]-decyl group, wherein from 1 to 5 of the carbon atoms has been replaced by a heteroatom, and wherein R2 is a monovalent radical which is an optionally substituted hydrocarbyl group having from 1 to 40 carbon atoms; a catalyst composition of use in said process; and a process of preparing ethylene glycol from the glycolaldehyde thus prepared.
    Type: Application
    Filed: September 10, 2008
    Publication date: January 8, 2009
    Inventors: Karina Quetzaly ALMEIDA LENERO, Eit DRENT, Roelof VAN GINKEL, Robert Ian PUGH
  • Process of preparing glycolaldehyde
    Patent number: 7449607
    Abstract: The invention provides a process of preparing glycolaldehyde by reacting formaldehyde with hydrogen and carbon monoxide in the presence of a catalyst composition which is based on, a) a source of rhodium, and b) a ligand of general formula R1P—R2(I), wherein R1 is a bivalent radical that together with the phosphorous atom to which it is attached is an optionally substituted 2-phospha-tricyclo[3.3.1.1{3,7}]-decyl group, wherein from 1 to 5 of the carbon atoms has been replaced by a heteroatom, and wherein R2 is a monovalent radical which is an optionally substituted hydrocarbyl group having from 1 to 40 carbon atoms; a catalyst composition of use in said process; and a process of preparing ethylene glycol from the glycolaldehyde thus prepared.
    Type: Grant
    Filed: December 15, 2004
    Date of Patent: November 11, 2008
    Assignee: Shell Oil Company
    Inventors: Karina Quetzaly Almeida Leñero, Eit Drent, Roelof Van Ginkel, Robert Ian Pugh