Patents by Inventor Stacy David Ross Johnston

Stacy David Ross Johnston 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).

  • Catalytic cracking of ethers to 1-olefins
    Patent number: 7700817
    Abstract: The current invention provides a process in which ethers are converted into ?-olefins by passage over a modified alumina catalyst. The alumina catalyst is made by treating gamma-alumina with a rare earth metal oxide such as lanthanum oxide, La2O3. The modified aluminum catalysts convert 1-methoxyoctane into 1-octene with high selectivity at high conversion rates.
    Type: Grant
    Filed: January 30, 2008
    Date of Patent: April 20, 2010
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Xiaoliang Gao, Stacy David Ross Johnston
  • Cracking 1-ethers over unmodified ?-alumina
    Patent number: 7576250
    Abstract: 1-Ethers may be cracked over untreated ?-alumina having a pore volume of more than 1.0 cc/g and an average pore diameter of more than 150 angstroms (?) at a temperature from 250 to 350° C. and a pressure from 10 to 200 kPa at high conversions and good selectivity to produce the corresponding 1-alkene. The process is particularly useful to produce 1-octene from 1-methoxyoctane.
    Type: Grant
    Filed: February 21, 2007
    Date of Patent: August 18, 2009
    Assignee: Nova Chemicals (International) S.A.
    Inventors: Xiaoliang Gao, Andrzej Krzywicki, Stacy David Ross Johnston, Alexandra Kalivoda
  • Conversion of ethers to olefins
    Patent number: 7442845
    Abstract: Ethers are cracked to olefins using a gamma-alumina catalyst in the presence of ammonia. The use of ammonia improves the selectivity to linear alpha olefins in comparison to cracking reactions in the absence of ammonia. The use of ammonia is convenient in comparison to known processes which employ alumina which as been treated with an amine. A preferred process produces octene-1 from 1-methoxyoctane.
    Type: Grant
    Filed: October 18, 2006
    Date of Patent: October 28, 2008
    Assignee: Nova Chemicals (International) S.A.
    Inventors: Xiaoliang Gao, Andrzej Krzywicki, Stacy David Ross Johnston
  • Catalytic cracking of ethers to 1-olefins
    Publication number: 20080194899
    Abstract: The current invention provides a process in which ethers are converted into ?-olefins by passage over a modified alumina catalyst. The alumina catalyst is made by treating gamma-alumina with a rare earth metal oxide such as lanthanum oxide, La2O3. The modified aluminum catalysts convert 1-methoxyoctane into 1-octene with high selectivity at high conversion rates.
    Type: Application
    Filed: January 30, 2008
    Publication date: August 14, 2008
    Inventors: Xiaoliang Gao, Stacy David Ross Johnston
  • Cracking 1-ethers over unmodified gamma-alumina
    Publication number: 20070203381
    Abstract: 1-Ethers may be cracked over untreated ?-alumina having a pore volume of more than 1.0 cc/g and an average pore diameter of more than 150 angstroms (?) at a temperature from 250 to 350° C. and a pressure from 10 to 200 kPa at high conversions and good selectivity to produce the corresponding 1-alkene. The process is particularly useful to produce 1-octene from 1-methoxyoctane.
    Type: Application
    Filed: February 21, 2007
    Publication date: August 30, 2007
    Inventors: Xiaoliang Gao, Andrzej Krzywicki, Stacy David Ross Johnston, Alexandra Kalivoda