title: Removal of acetic acid from simulated hemicellulosic hydrolysates by emulsion liquid membrane with organophosphorus extractants.
abstract: Selective removal of acetic acid from simulated hemicellulosic hydrolysates containing xylose and sulfuric acid was attempted in a batch emulsion liquid membrane (ELM) system with organophosphorus extractants. Various experimental variables were used to develop a more energy-efficient ELM process. Total operation time of an ELM run with a very small quantity of trioctylphosphine oxide as the extractant was reduced to about a third of those required to attain almost the same extraction efficiency as obtained in previous ELM works without any extractant. Under specific conditions, acetic acid was selectively separated with a high degree of extraction and insignificant loss of xylose, and its purity and enrichment ratio in the stripping phase were higher than 92% and 6, respectively. Also, reused organic membrane solutions exhibited the extraction efficiency as high as fresh organic solutions did. These results showed that the current ELM process would be quite practical.
authors.affiliation: Department of Chemical Engineering, Kunsan National University, 558 Daehak-ro, Gunsan, Jeollabuk-do 573-701, Republic of Korea. Electronic address: lee40f@kunsan.ac.kr.
authors.forename: Sang Cheol
authors.initials: SC
authors.lastname: Lee
mesh_terms: D019342:Acetic Acid / Q000302:isolation & purification*; D004655:Emulsions / Q000737:chemistry; D006868:Hydrolysis; D059625:Liquid-Liquid Extraction / Q000295:instrumentation / Q000379:methods*; D008567:Membranes, Artificial; D009943:Organophosphorus Compounds / Q000737:chemistry; D010758:Phosphorus / Q000737:chemistry; D011134:Polysaccharides / Q000737:chemistry*; D012996:Solutions; D013997:Time Factors
chemical_list: D004655:Emulsions; D008567:Membranes, Artificial; D009943:Organophosphorus Compounds; D011134:Polysaccharides; D012996:Solutions; D010758:Phosphorus; C044965:trioctyl phosphine oxide; C007916:hemicellulose; D019342:Acetic Acid
keywords: Acetic acid; Economical separation process; Emulsion liquid membrane; Organophosphorus extractant; Simulated hemicellulosic hydrolysate