title: Recovery of acetic acid from pre-hydrolysis liquor of hardwood kraft-based dissolving pulp production process by reactive extraction with triisooctylamine.
abstract: Acetic acid was one of the main compositions of the pre-hydrolysis liquor (PHL), which was recovered by reactive extraction with triisooctylamine (TIOA) diluted with decanol. Dilution of TIOA played an important role in extracting acetic acid from the PHL. The recovery of acetic acid from the PHL by TIOA was increased from 10.34% to 66.60% with the dilution of TIOA to 20% by decanol at the HAc to TIOA molar ratio of 1, consequently, the equilibrium distribution coefficient KD increased. The effects of time, temperature and pH on the extraction process were also studied. The extraction process was very fast. The acetic acid extraction decreased from 65.13% to 57.34% with the rise of temperature to 50°C from 20°C. A higher pH increased the dissociation of acetic acid, as a result, decreased acetic acid extraction. The hemicelluloses in the PHL were unaffected on the extraction process of acetic acid.
authors.affiliation: Key Laboratory of Pulp & Paper Science and Technology (Shandong Polytechnic University), Ministry of Education, Jinan 250353, Shandong, China. ygh@spu.edu.cn
authors.forename: G
authors.initials: G
authors.lastname: Yang
authors.forename: M Sarwar
authors.initials: MS
authors.lastname: Jahan
authors.forename: Laboni
authors.initials: L
authors.lastname: Ahsan
authors.forename: Linqiang
authors.initials: L
authors.lastname: Zheng
authors.forename: Yonghao
authors.initials: Y
authors.lastname: Ni
mesh_terms: D019342:Acetic Acid / Q000302:isolation & purification*; D000588:Amines / Q000737:chemistry*; D001709:Biotechnology / Q000379:methods*; D002606:Charcoal / Q000737:chemistry; D005233:Fatty Alcohols / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D007220:Industrial Waste / Q000032:analysis*; D008031:Lignin / Q000737:chemistry*; D013696:Temperature; D013997:Time Factors; D014934:Wood / Q000737:chemistry*
chemical_list: D000588:Amines; D005233:Fatty Alcohols; D007220:Industrial Waste; D002606:Charcoal; C029383:n-decyl alcohol; D008031:Lignin; D019342:Acetic Acid; C008699:octylamine