| 摘要 |
<p>The invention is concerned with an improved pulping process for producing high yield pulps from woody lignocellulosic material wherein the lignocellulosic material is treated with a pulping chemical and mechanically defibrated. The improvement comprises pre-treating the lignocellulosic material by impregnating same with a water-miscible loweralkanolamine and ammonium hydroxide so as to cause softening of lignin in the material and to promote fiber separation. As a result, pulping chemical and refining energy consumption as well as vapor and liquid effluent pollution are significantly reduced.</p> |
