| 摘要 |
<p>FOR THE DISCLOSURE OXYGEN PULPING A method of cooking cellulosic material in one or more stages in an alkaline medium under high oxygen pressure by, at least every 30 minutes during the cook, reducing the pressure in the vessel substantially by venting gas therefrom, followed by returning the vessel to operating pressure by injection of oxygen containing gas. The pressure is reduced by at least 50 p.s.i.</p> |
