Development of dissolving pulp from Phyllostachys pubescens stem by prehydrolysis soda cooking with 2-methylanthraquinone

Nypa fruticans Frond Waste for Pure Cellulose Utilizing Sulphur-Free and Totally Chlorine-Free Processes

“…Harsono et al revealed that extension of the time did not affect the complete delignification and dissolution of hemicellulose [ 34 ]. The effect of AA on decreasing the kappa number and pulp yield in various AA dosages was also observed in the previous studies [ 30 , 32 , 34 ], which indicates that the increase in AA led to lignin removal.…”

“…Furthermore, Maryana et al [ 32 ] recorded 33.9–34.7% yields with low kappa numbers of 5.3–5.7 using prehydrolysis for 3 h at 150 °C and soda-SAQ cooking for 2 h at 150 °C with a 17–19% AA dosage for sugarcane bagasse. Chem et al [ 30 ] reported a higher kappa number of 12.8–22.9 from Moso bamboo stem pulp than this study, but the yields of 32.6–34.0% were comparable when using 3 h prehydrolysis at 150 °C and 3 h cooking at 160 °C with 17–23% AA dosage. Banana plant stem gave high kappa numbers of 28.3–37.6 and 27–30% pulp yields using prehydrolysis for 3 h at 150 °C and cooking for 0.5–1.5 h at 150 °C with 25% AA dosage [ 54 ].…”

“…Additionally, Figure 4 illustrates the positive effect on kappa number of increasing the prehydrolysis time. However, a decrease in these parameters has previously been reported with 1.0–7.0 h prehydrolysis time using Moso bamboo and oil palm empty fruit bunches [ 30 , 34 , 55 ]. The low pulp yield from the process was caused by the removal of hemicellulose [ 55 ].…”

“…Utami et al [ 29 ] revealed the advantages of prehydrolysis followed by soda with soluble anthraquinone (soda-SAQ) cooking over kraft cooking for Acacia crassicarpa , namely a higher pulp yield of 1.8% and a higher brightness level by 3.8–3.9 points. Jahan et al [ 30 ] also stated that the method led to additional decreases of 1.2–6.3 points in the kappa numbers of Acacia auriculiformis compared to the kraft and soda processes after bleaching. These studies reported higher yields of soda-SAQ compared to kraft cooking, namely by 2.8–4.3%.…”

Prehydrolysis soda pulping of Enset fiber for production of dissolving grade pulp and biogas

“…[5][6][7] The quality of dissolving pulp mainly depends on the raw material used and the processing technique. 8 Dissolving-grade pulp is commercially produced from 85% hardwood or sowood and 10% cotton linters. 9 Due to increased demand, much research has been devoted to producing dissolving-grade pulp from nonwood materials such as bamboo, straw and bagasse.…”