The use of l-lysine decarboxylase as a means to separate amino acids by electrodialysis

Teng, Yinglai; Scott, Elinor L.; Zeeland, Albert N. T. van; Sanders, J.P.M.

doi:10.1039/c0gc00611d

Cited by 44 publications

(63 citation statements)

References 25 publications

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“…This enzyme has been studied in detail and conversions to cinnamic acid (2) are in the range of 58 to 93%. [13][14][15] Here we report the conversion of cinnamic acid (2) to styrene (3) and acrylic acid (4), which follows a metathesis reaction using ethylene, also called ethenolysis.…”

Section: Resultsmentioning

confidence: 99%

Simultaneous production of biobased styrene and acrylates using ethenolysis

et al. 2012

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Phenylalanine (1), which could be potentially obtained from biofuel waste streams, is a precursor of cinnamic acid (2) that can be converted into two bulk chemicals, styrene (3) and acrylic acid (4), via an atom efficient pathway. With 5 mol% of Hoveyda-Grubbs 2nd generation catalyst, 1 bar of ethylene, and using dichloromethane as solvent, cinnamic acid (2) can be converted to acrylic acid and styrene at 40°C in 24 h with 13% conversion and 100% selectivity. Similar results are obtained using cinnamic acid esters (methyl, ethyl and n-butyl) as substrates and optimisation leads to higher conversions (up to 38%). For the first time, cross-metathesis of these types of electron deficient substrates was achieved.

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Section: Resultsmentioning

confidence: 99%

Simultaneous production of biobased styrene and acrylates using ethenolysis

et al. 2012

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“…Therefore, it is needed to extract and enrich the amino acids in the tobacco and tobacco smoke before derivatization and HPLC. There are many methods are used to separate amino acids including precipitation [11], ion exchange [3], electromembrane extraction [12], liquidliquid extraction [13,14], solid phase extraction [15] and electrodialysis [16], etc. In view of solid-phase extraction (SPE) has the characteristics of time-saving, separation and enrichment of analytes so that it becomes the key step in the analysis of trace compounds in samples with complex matrices.…”

Section: Introductionmentioning

confidence: 99%

Preparation of molecularly imprinted polymers using theanine as dummy template and its application as SPE sorbent for the determination of eighteen amino acids in tobacco

Zhu

Wang

Zhu

et al. 2016

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“…If such modification leads directly to a product with industrial interest, the production and separation steps could be integrated into one process that might offer a more techno-economically efficient route for the production of chemicals. 16 Here the separation of an acidic AA stream containing Asp and Glu from a potential ED process was studied. As previously described, both AAs are interesting starting materials to produce nitrogen-containing chemicals, so it would be beneficial to separate them or their products.…”

Section: Introductionmentioning

confidence: 99%

Separation of L‐aspartic acid and L‐glutamic acid mixtures for use in the production of bio‐based chemicals

Teng

Scott

Sanders

2012

J of Chemical Tech & Biotech

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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. Copyright © 2012 Society of Chemical Industry

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The use of l-lysine decarboxylase as a means to separate amino acids by electrodialysis

Cited by 44 publications

References 25 publications

Simultaneous production of biobased styrene and acrylates using ethenolysis

Simultaneous production of biobased styrene and acrylates using ethenolysis

Preparation of molecularly imprinted polymers using theanine as dummy template and its application as SPE sorbent for the determination of eighteen amino acids in tobacco

Separation of L‐aspartic acid and L‐glutamic acid mixtures for use in the production of bio‐based chemicals

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