Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 423033
Title Separation of L-aspartic acid and L-glutamic acid mixtures for use in the production of bio-based chemicals
Author(s) Teng, Y.; Scott, E.L.; Sanders, J.P.M.
Source Journal of Chemical Technology and Biotechnology 87 (2012)10. - ISSN 0268-2575 - p. 1458 - 1465.
Department(s) Biobased Chemistry and Technology
Publication type Refereed Article in a scientific journal
Publication year 2012
Keyword(s) nitrogen-containing chemicals - amino-acids - biobased production - derivatives - hydrolysis - proteins - kinetics
Abstract BACKGROUND: Amino acids are promising feedstocks for the chemical industry due to their chemical functionality. They can be obtained by the hydrolysis of potentially inexpensive protein streams such as the byproduct of biofuel production. However, individual amino acids are required before they can be used for the further production of chemicals. Here, the separation of L-aspartic acid (Asp) and L-glutamic acid (Glu) mixture, which can be isolated from protein hydrolysis solutions at low pH or from electrodialysis of complex amino acid mixtures, was studied. RESULTS: Glu was converted into L-pyroglutamic acid (pGlu) which can be separated from the mixture of Asp and Glu due to its higher solubility in water. The conversion was carried out under aqueous or melt conditions. Under aqueous conditions, the conversion was studied as a factor of time, temperature and the amount of Glu. The conversion was specific with high yield and not effected by Asp. After pGlu was separated from Asp and residual Glu by solubility difference, it can be transferred back to Glu through hydrolysis. CONCLUSION: The conversion of Glu to pGlu is specific and can be applied to separation Asp and Glu for their use in the production of bio-based chemicals
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