Patents by Inventor Päivi Mäki-Arvela

Päivi Mäki-Arvela 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).

  • Method for the manufacture of hydrocarbons
    Patent number: 7491858
    Abstract: Feedstock originating from renewable sources is converted to hydrocarbons in diesel fuel distillation range by contacting with a supported catalyst comprising VIII group metal/metals, whereby the consumption of hydrogen is decreased.
    Type: Grant
    Filed: January 17, 2006
    Date of Patent: February 17, 2009
    Assignee: Fortum Oyj
    Inventors: Dmitry Yu Murzin, Iva Kubickova, Mathias Snåre, Päivi Mäki-Arvela, Jukka Myllyoja
  • Process for the preparation of polyols
    Patent number: 6593502
    Abstract: The invention relates to a process for the preparation of polyols having 3 or 4 hydroxyl groups, from an aldehyde and formaldehyde in the presence of water, followed by hydrogenation of the aldolisation product in the presence of a hydrogenation catalyst at an elevated temperature. The aledhyde is obtained by an aldolisation reaction of an aldehyde having at least two &agr;-hydrogen atoms and a formula according to R1CH2CHO, wherein R1 is selected from a group comprising hydrogen, alkyl groups having 1-7 carbon atoms which can have cycloalkyl substituents, cycloalkyl groups, aryl groups and aralkyl groups with 1-7 carbon atoms is the alkyl chain, with formaldehyde in the presence of water in an amount of 20-70 wt %, preferably 40-60 wt % and in the presence of an anion exchange resin. The hydrogenation is preferably carried out in the presence of water.
    Type: Grant
    Filed: January 2, 2002
    Date of Patent: July 15, 2003
    Assignee: Dynea Chemicals Oy
    Inventors: Tapio Salmi, Valentina Serra-Holm, Tiina-Kaisa Rantakylä, Päivi Mäki-Arvela, Lars-Peter Lindfors, Hannu Nousiainen