竹制溶解浆粕蒸煮新工艺

New techniques for pulping process of bamboo dissolving pulp.

为了提高竹制溶解浆粕的纤维素纯度,该文以四川慈竹为原料,利用预浸硫酸盐(KP)法和非预浸KP法制备溶解浆粕,并对两种工艺条件下浆粕的性质进行了对比研究,同时确定了预浸KP法蒸煮的最佳工艺条件。结果表明:预浸时间30 min、蒸煮用碱量18%、硫化度20%为预浸KP法的最佳工艺条件。预浸KP浆粕α-纤维素含量较非预浸KP浆粕有较大提高,能够达到91%以上;且经漂白后,预浸KP浆粕α-纤维素含量能够达到95%以上,大大提高了浆粕纤维素纯度,可以达到溶解浆粕纺丝的要求。

With Neosinocalamus affinis as materials,properties of two kinds of pulp obtained by preimpregnation and non-preimpregnation KP methods were compared in order to improve the cellulose purity of dissolving bamboo pulp.The optimum cooking technical conditions of preimpregnation KP method were also determined as preimpregnation 30?min,alkali charge of cooking 18% and sulfidity 20%.Compared with non-preimpregnation KP method,the content of α-celluloses in the preimpregnation KP method increased and reached 91% or more.After bleaching,the content could be 95% or more,which significantly improved the cellulose purity of the pulp and could satisfy the demand of dissolving pulp.