日本落叶松AS-AQ浆和KP浆的漂白特性比较

为深入了解日本落叶松的纸浆物理性能，该文以日本落叶松AS-AQ浆为原料，对纸浆的漂白特性进行了系统研究，并与KP浆的漂白特性进行了比较.研究结果表明:在常规CEH三段漂白中，最佳有效氯用量为8%，NaOH用量为2.5%，漂白纸浆的白度可达到73%(ISO).在CDEHD漂白中，最佳有效氯用量为9%，EH段NaOH的合理用量为2%，纸浆白度能够达到7.9%(ISO).在D/CE1D1E2D2和DE1D1E2D2漂白中，当总有效氯用量为7.9%时，两种漂白流程都能将纸浆漂到83%(ISO)的高白度.采用过氧化氢加强氧漂再加两段过氧化氢漂白的漂白流程（即OPQP1P2）可以将白度为27%(ISO)的纸浆漂到76%(ISO).无论是漂白浆还是未漂浆，AS-AQ浆的聚合度都在KP浆之上. 

Comparison of the characteristics of alkaline_anthraquinone pulp and kraft pulp of Japanese larch.

This paper systematically investigated bleaching properties of AS-AQ pulp of Japanese larch and compared the differences between AS-AQ pulp and KP pulp in order to understand physical properties of Japanese larch pulp. The results show that the whiteness of bleaching pulp can reach 73% (ISO) after three stage bleaching of general CEH, where the most effective dosages of chlorine and NaOH are 8% and 2.5% respectively.The whiteness of pulp can reach 79% (ISO) after the bleaching of C_DE_HD when the most effective dosage of chlorine is 9% and a reasonable dosage of NaOH on E-H stage 2%.Both bleaching procedures can reach 83% (ISO) with the total effective dosage of chlorine 7.9% after bleaching with D/CE_1D_1E_2D_2 and DE_1D_1E_2D_2.The whiteness of pulp can reach 76% (ISO) from 27% by a procedure of oxygen bleaching with enhanced H_2O_2 and bleaching with two stage H_2O_2 (O_PQP_1P_2).The degree of polymerization of AS-AQ pulp,whether unbleached or bleached pulp,is higher than that of KP pulp.