Patents by Inventor Andrzej Krzywicki

Andrzej Krzywicki 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).

  • Reduction of fouling in thermal processing of olefinic feedstocks
    Publication number: 20060222555
    Abstract: Reduction of fouling in a thermal process for treating feed streams comprising naphtha, pyrolysis oils or a mixture thereof said feed stream having a combined olefinic content from 10 to 50 weight % and the balance inert hydrocarbons at a temperature from 100° C. to 300° C. which comprises decreasing the amount of carbon steel in the apparatus contacting said feed stream and increasing the amount of stainless steel.
    Type: Application
    Filed: February 28, 2006
    Publication date: October 5, 2006
    Inventors: Patricio Herrera, Andrzej Krzywicki, Micheal Sprague
  • Passivation of steel surface to reduce coke formation
    Patent number: 7056399
    Abstract: The present invention provides a process to treat steels, preferably carbon steel to reduce the tendency of the steel to form coke when in contact with hydrocarbons at elevated temperatures. The steel may be first reduced then treated with a mixture of compounds which further modify the reduced surface and finally the treated steel surface is cured. The treated steel has a reduced propensity to form coke when in contact with hydrocarbons particularly at higher temperatures.
    Type: Grant
    Filed: April 29, 2003
    Date of Patent: June 6, 2006
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Haiyong Cai, Michael C. Oballa, Andrzej Krzywicki, Leslie Wilfred Benum
  • Integrated process to convert heavy oils from oil sands to petrochemical feedstock
    Publication number: 20050258073
    Abstract: An aromatics/naphthalene rich stream obtained by processing heavy gas oil derived from tar sands and cycle oils derived from cracking heavy gas oil may optionally be blended and subjected to a hydrogenation process and a ring opening reaction typically in the presence of a zeolite, alumina, or silica alumina based catalyst which may contain noble metals and or copper or molybdenum to produce paraffinic feedstocks for further chemical processing.
    Type: Application
    Filed: May 17, 2005
    Publication date: November 24, 2005
    Inventors: Michael Oballa, Andrzej Krzywicki, Sunny Wong, Anthony Tse, Abdul Fakih
  • Passivation of steel surface to reduce coke formation
    Publication number: 20040216815
    Abstract: The present invention provides a process to treat steels, preferably carbon steel to reduce the tendency of the steel to form coke when in contact with hydrocarbons at elevated temperatures. The steel may be first reduced then treated with a mixture of compounds which further modify the reduced surface and finally the treated steel surface is cured. The treated steel has a reduced propensity to form coke when in contact with hydrocarbons particularly at higher temperatures.
    Type: Application
    Filed: April 29, 2003
    Publication date: November 4, 2004
    Inventors: Haiyong Cai, Michael C. Oballa, Andrzej Krzywicki, Leslie Wilfred Benum
  • Decoke enhancers for transfer line exchangers
    Patent number: 6772771
    Abstract: In a steam cracking operation the formation of coke is a problem which needs to be overcome. While significant work has been done on decoking of furnaces little work has been done regarding transfer line exchangers. Coking of transfer line exchangers (TLE) may be reduced by injection of a solution containing at least one group 1 or 2 metal dichromate or dichromate and one or more of a group 1, 2 or 7 metal carbonate into the TLE.
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: August 10, 2004
    Assignee: Nova Chemicals (International) S.A.
    Inventors: Haiyong Cai, Michael C. Oballa, Andrzej Krzywicki, Ted Magtanong, Les Benum
  • Use of ionic liquids to separate diolefins
    Publication number: 20040106838
    Abstract: The present invention relates to the separation of diolefins from mixed streams of hydrocarbons using ionic liquids in the absence of metal compounds.
    Type: Application
    Filed: December 2, 2002
    Publication date: June 3, 2004
    Applicant: NOVA Chemicals (International) S.A.
    Inventors: Ronald Scott Smith, Patricio S. Herrera, Jeffrey Sean Reynolds, Andrzej Krzywicki
  • Decoke enhancers for transfer line exchangers
    Publication number: 20030183248
    Abstract: In a steam cracking operation the formation of coke is a problem which needs to be overcome. While significant work has been done on decoking of furnaces little work has been done regarding transfer line exchangers. Coking of transfer line exchangers (TLE) may be reduced by injection of a solution containing at least one group 1 or 2 metal dichromate or dichromate and one or more of a group 1, 2 or 7 metal carbonate into the TLE.
    Type: Application
    Filed: March 28, 2002
    Publication date: October 2, 2003
    Applicant: NOVA Chemicals (International) S.A.
    Inventors: Haiyong Cai, Michael C. Oballa, Andrzej Krzywicki, Ted Magtanong, Les Benum
  • Method for extending hydroconversion catalyst life
    Patent number: 5124024
    Abstract: A method for prolonging a hydroconversion catalyst life-time is provided. An additive functional to partially redirect the deposition of catalytic poisoning agents on the catalyst is utilized. The additive may comprise a chemically inert, porous carbonaceous material or ferruginous clay.
    Type: Grant
    Filed: November 9, 1990
    Date of Patent: June 23, 1992
    Assignees: Nova Husky Research Corporation, Alberta Research Council
    Inventors: Andrzej Krzywicki, Leszek Lewkowicz, Michael C. Oballa