Patents by Inventor Raimo Alen

Raimo Alen 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 for the production of xylitol
    Patent number: 6894199
    Abstract: The present invention relates to the production of xylitol. In particular, processes utilising L-xylose as an intermediate for xylitol production are described. The present invention also relates to process for the preparation or L-xylose, as an intermediate, by-product or end-product to be used per se.
    Type: Grant
    Filed: April 29, 2002
    Date of Patent: May 17, 2005
    Assignee: Danisco Sweeteners Oy
    Inventors: Heikki Heikkilä , Heikki Ojamo, Matti Tylli, Vili Ravanko, Juha Nurmi, Piia Haimi, Raimo Alen, Hannu Koivikko
  • Process for the production of xylitol
    Publication number: 20030097029
    Abstract: The present invention relates to the production of xylitol. In particular, processes utilising L-xylose as an intermediate for xylitol production are described. The present invention also relates to process for the preparation or L-xylose, as an intermediate, by-product or end-product to be used per se.
    Type: Application
    Filed: April 29, 2002
    Publication date: May 22, 2003
    Inventors: Heikki Heikkila, Heikki Ojamo, Matti Tylli, Vili Ravanko, Juha Nurmi, Piia Haimi, Raimo Alen, Hannu Koivikko
  • Method of producing polyols from arabinoxylan-containing material
    Patent number: 6262318
    Abstract: The invention relates to a method of producing xylitol and erythritol from arabinoxylan-containing material. According to the invention, the arabinoxylan-containing material is hydrolyzed and xylose and arabinose are separated from the obtained hydrolysate, whereafter the xylose is reduced to xylitol, and the xylitol is recovered, and the arabinose is subjected to alkaline oxidation to obtain erythronic acid which is reduced to erythritol, and the erythritol is recovered.
    Type: Grant
    Filed: November 1, 1999
    Date of Patent: July 17, 2001
    Assignee: Xyrofin Oy
    Inventors: Heikki Heikkilä, Raimo Alen, Siru Kauko, Mirja Lindroos, Juha Nurmi, Päivi Sarmala, Matti Tylli
  • Procedure for determining and controlling the composition proportions of wood chip mixes in alkaline pulp digestion processes
    Patent number: 5032223
    Abstract: A procedure for determining the composition of a wood chip mix dispensed in alkaline delignifying processes, particularly in sulphate and soda/anthraquinone cooking, with the aid of the monomeric compounds produced in connection with the cooking and dissolved in the waste liquor. As taught by the procedure, a cooking liquor sample is taken in the cooking process, this sample being chromatographically analyzed. On the basis of the content proportions of certain compounds analyzed by substance groups, the composition of the dispensed wood chip mix is determined, and at the same time information is gained for optimating the conditions applied in the cooking process.
    Type: Grant
    Filed: October 4, 1989
    Date of Patent: July 16, 1991
    Assignee: Kajaani Elektroniikka Oy
    Inventors: Raimo Alen, Pasi Hentunen, Leena Paavilainen, Eero Sjostrom, Taina Sopenlehto-Pehkonen, Olavi Sundstrom
  • Method for controlling alkaline pulping process
    Patent number: 4853084
    Abstract: A method for controlling the alkaline delignification processes, especially the sulphate process of wood or other materials containing cellulose by the interdepending concentrations of the hydroxymonocarboxylic acids which are formed in the process and dissolved into the waste liquor. According to the method a sufficient number of representative waste liquor samples are taken during the process and the acids present in the samples are analyzed by gas chromatography. Thus, the required time interval for achieving the desired cooking stage can be determined by using the interdepending ratios of the concentrations of certain acids.
    Type: Grant
    Filed: March 9, 1987
    Date of Patent: August 1, 1989
    Inventors: Raimo Alen, Eero Sjostrand