Details

Autor(en) / Beteiligte

• Yang, G.
• Jahan, M. Sarwar
• Ahsan, Laboni
• Zheng, Linqiang
• Ni, Yonghao

Titel

Recovery of acetic acid from pre-hydrolysis liquor of hardwood kraft-based dissolving pulp production process by reactive extraction with triisooctylamine

Ist Teil von

• Bioresource technology, 2013-06, Vol.138, p.253-258

Ort / Verlag

Kidlington: Elsevier Ltd

Erscheinungsjahr

2013

Quelle

MEDLINE

Beschreibungen/Notizen

• •Acetic acid was recovered from the PHL by reactive extraction with triisooctylamine.•Diluent played an important role in recovering acetic acid from the PHL.•Temperature and pH negatively affected the acetic acid extraction.•Acetic acid concentration positively affected the acetic acid extraction. 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.