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研究了麦草碱性亚硫酸盐-蒽醌(AS/AQ)法制浆和TCF漂白。在AS/AQ蒸煮过程中,有效碱用量16%(对绝干原料),升温时间60min,蒽醌用量0.1%,液比4∶1,碱比(Na2SO3/NaOH的质量比,以NaOH计)的范围从20/80到80/20,最高蒸煮温度152～160℃,在最高温度下的保温时间30～90min。AS/AQ浆用OQ(OP)或者OQ(OP)P流程进行TCF漂白。氧脱木素段(O)大概能脱除木素的1/3,螯合处理(Q)和随后的OP段能使纸浆的白度达到82.7%。使用OQ(OP)P的漂白流程,当P段H2O2用量为2%时,纸浆的白度可由OP段之后的77.2%提高到83.6%。漂白仅使纸张的抗张强度和耐破度稍有降低,但能提高纸张的撕裂度。在Jokro厂中进行短时间的打浆,足以获得较好的纸浆强度。研究表明,麦草采用AS/AQ法制浆和TCF漂白可以得到高质量的纸浆,能够用来生产印刷书写纸。
The wheat straw alkaline sulfite - anthraquinone (AS / AQ) pulping and TCF bleaching were studied. In the AS / AQ cooking process, the effective alkali dosage is 16% (for the absolutely dry raw material), the heating time is 60min, the anthraquinone dosage is 0.1%, the liquid ratio is 4:1, the alkali ratio (mass ratio of Na2SO3 / NaOH, The range of 20/80 to 80/20, the maximum cooking temperature of 152 ~ 160 ℃, at the highest temperature holding time 30 ~ 90min. TCF bleaching was performed using the OQ (OP) or OQ (OP) P flow for AS / AQ pulp. Oxygen delignification (O) is about 1/3 of that of lignin, and the chelation (Q) and the subsequent OP can make the whiteness of pulp reach 82.7%. Bleaching with OQ (OP) P increased the whiteness of the pulp from 77.2% to 83.6% after the OP segment when the amount of P 2 H2O2 was 2%. Bleaching only slightly reduces the tensile strength and burst resistance of the paper but increases the tear of the paper. A short beating at the Jokro plant is sufficient to achieve better pulp strength. Studies have shown that wheat straw using AS / AQ pulp and TCF bleaching can get high quality pulp, can be used to produce printed writing paper.