| 摘要 |
<p>A method of improving the selectivity when bleaching cellulosic fibre material with ozone while using at least one organic compound selected from the group consisting of alcohols, aldehydes and carboxylic acids. According to the invention the organic compound is added to the ozone-containing gas so that it is mixed homogeneously therewith before the ozone-containing gas is brought into contact with the cellulosic fibre material.</p> |
