Nineteen different amino acids were liquefied by reaction at 300 degre
es C for 1 h to study distribution of nitrogen in amino acids and reac
tion products. Oil yields of the amino acids except tryptophan were le
ss than 10%. Nitrogen contents of oil were less than 13%. All of the a
mino acids were unstable and most of the amino acid, except tryptophan
, was converted to water soluble nitrogen compounds other than amino a
cids, so that the residue of nitrogen in feedstock amino acids in the
oil was less than 7%. For tryptophan, oil yield was 66% and the distri
bution of nitrogen to the oil was 50%. (C) 1998 Elsevier Science Ltd.
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