| 摘要 |
<p>A method for enhancing separation of soap from black liquor. A neutral substance colloid, stabilized with fatty adn resin acids and prepared from separated soap or from another process or intermediate product of a pulp mill, is added to the black liquor. The neutral substance colloid is added in an amount sufficient to convert most fatty and resin acid micelles present in the black liquor into a liquid crystalline form. In the form of a liquid crystalline phase that is lighter than water, these soap particles rise to the surface of the black liquor, from where they are easy to recover. A suitable dosage of the neutral substance colloid is, for example, 0.01-0.04 % of the amounf of soap dissolved in the black liquor.</p> |
