Effect of solvent and impurity on synthesis of ethyl lactate from fermentation-derived ammonium lactate

Fermentation-derived ammonium lactate was converted into ethyl lactate by decomposition in various organic solvents followed by esterification with ethanol over Amberlyst catalyst. The ammonium lactate was decomposed more efficiently in an organic solvent with high boiling point, where the produced...

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Vydané v:	Chemical engineering science Ročník 66; číslo 20; s. 4549 - 4554
Hlavní autori:	Kasinathan, Palraj, Hwang, Dong Won, Lee, Uhwang, Hwang, Young Kyu, Chang, Jong-San
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	Kidlington Elsevier Ltd 15.10.2011 Elsevier
Predmet:	amino acids Ammonium lactate Applied sciences Biochemical engineering Biological and medical sciences Biotechnology boiling point Catalysis Catalytic reactions Chemical engineering Chemical processes Chemistry Decomposition reactions dimethyl sulfoxide esterification ethanol Ethyl alcohol Ethyl lactate Exact sciences and technology Fermentation Fundamental and applied biological sciences. Psychology General and physical chemistry Impurities Lactates Lactic acid Methods. Procedures. Technologies Others Phosphates Reactors Solvents temperature Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry Various methods and equipments Catalysis Chemical processes Ethyl lactate Fermentation Biochemical engineering Ammonium lactate Organic solvent Impurity Boiling point Catalyst Esterification Strength
ISSN:	0009-2509, 1873-4405
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Shrnutí:	Fermentation-derived ammonium lactate was converted into ethyl lactate by decomposition in various organic solvents followed by esterification with ethanol over Amberlyst catalyst. The ammonium lactate was decomposed more efficiently in an organic solvent with high boiling point, where the produced lactic acid was stabilized well as a monomer without oligomerization. However, only the nonreactive phosphate-type solvent such as triethyl phosphate and tributyl phosphate showed a notable ethyl lactate yield in the subsequent esterification reaction compared with dimethyl sulfoxide and N-methyl pyrolidine. The lactic acid yield in ammonium lactate decomposition and the subsequent ethyl lactate yield were also highly dependent on solvent ratio to ammonium lactate, temperature and pressure in ammonium lactate decomposition reaction. The amino acid impurity contained in the fermented ammonium lactate as well as the unreacted ammonium lactate reduced the acid strength of Amberlyst-36, which resulted in the final ethyl lactate yield. ► Ethyl lactate was produced selectively from ammonium lactate by hybrid process. ► Triethyl phosphate was the most efficient solvent for ethyl lactate synthesis. ► The ethyl lactate yield was influenced by the fermentation-derived amino acid.
Bibliografia:	http://dx.doi.org/10.1016/j.ces.2011.06.017 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0009-2509 1873-4405
DOI:	10.1016/j.ces.2011.06.017