Xyrofin Oy

Danisco Sweeteners Oy

Kajaani Elektroniikka Oy

Raimo Alen

Juha Veikko Nurmi

Matti Tylli

Heikki Heikkilä

Heikki Heikkil&auml;

Vili Ravanko

Mirja Lindroos

Hannu Koivikko

Heikki Ojamo

Eero Sjostrom

P&auml;ivi Sarmala

Siru Kauko

Pasi Hentunen

Leena Paavilainen

Taina Sopenlehto-Pehkonen

Piia Haimi

Olavi Sundstrom

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.

Process for the production of xylitol

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.

Method of producing polyols from arabinoxylan-containing material

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.

Procedure for determining and controlling the composition proportions of

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Raimo Alen