Process for conversion of lysine dihydrochloride to lysine monoh

Details Process for conversion of lysine dihydrochloride to lysine monoh Process for conversion of lysine dihydrochloride to lysine monoh

1974-05-28

1976-01-06

Garner, Vivian

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2602393A, C07C 9900, C07C 9906, C07C 9912

Patent

active

039313085

ABSTRACT:
Lysine dihydrochloride solution, formed by the hydrolysis of .alpha.-amino-.epsilon.-caprolactam, is converted to crystalline lysine monohydrochloride by neutralization with .alpha.-amino-.epsilon.-caprolactam or a transition metal complex thereof and crystallization from the solution with an organic solvent. After removal of the precipitated lysine monohydrochloride, the remaining solution is fractionated and that fraction consisting essentially of the by-product of the neutralization may be recycled to ensure recovery of substantially all the desired product and utilization of all processing agents.

REFERENCES:
patent: 2556917 (1951-06-01), Hambrock
patent: 2564649 (1951-08-01), Rogers
patent: 2876218 (1959-03-01), Francis et al.
patent: 3576859 (1971-04-01), Nelemans

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