Method of dissolving crystals of L-.alpha.-aspartyl-L-phenylalan

Details Method of dissolving crystals of L-.alpha.-aspartyl-L-phenylalan Method of dissolving crystals of L-.alpha.-aspartyl-L-phenylalan

1995-06-05

1997-04-15

Barts, Samuel

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

C07C22900

Patent

active

056211376

ABSTRACT:
A method for dissolving crystalline L-alpha-aspartyl-L-phenyl-alanine methyl ester product is disclosed. The product is obtained by crystallizing the ester from an aqueous solution, by cooling. The initial concentration of ester in the aqueous solution used provides at least 10 grams of precipitated solid phase per liter of solution. The solution is cooled through conductive heat transfer without effecting forced flow to form a sherbet-like pseudo solid phase.

REFERENCES:
patent: 4173562 (1979-11-01), Bachman
patent: 4309341 (1982-01-01), Kubo et al.
patent: 5041607 (1991-08-01), Naruse et al.
patent: 5097060 (1992-03-01), Naruse et al.
"Industrial Crystallization 78", Proceedings of the 7th Symposium on Industrial Crystallization, Warsaw, Poland, 25-27 Sep., 1978, Delft University of Technology, The Neterlands, North-Holland Publishing Company--Amsterdam, New York (1979), pp. 405-414.

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