| 摘要 |
<p>A process for the continuous mass-production of chemical pulp from cellulosic material without adversely affecting the global environment and natural resources. The process comprises the step of digesting cellulosic material with a cooking liquor comprising an alkali solution, hydrogen peroxide, a chelating agent, an anthraquinone and water at 130 to 200 °C, the step of subjecting the digestion product to solid-liquid separation to obtain unbleached pulp and waste liquor, the step of concentrating and burning the waste liquor to obtain alkali metal carbonate, the step of adding, if necessary, calcium oxide to the aqueous solution of sodium or/and potassium carbonate to cause causticization, and the step of adding hydrogen peroxide, a chelating agent and an anthraquinone to the alkali solution to regenerate the cooking liquor.</p> |
