Method of producing crystals of L-arginine phosphate monohydrate

Details Method of producing crystals of L-arginine phosphate monohydrate Method of producing crystals of L-arginine phosphate monohydrate

1987-09-16

1988-11-01

Shippen, Michael L.

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

Organic compounds

Carboxylic acids and salts thereof

C07C12908

Patent

active

047821825

ABSTRACT:
Large flaw-free crystals of L-arginine phosphate monohydrate (LAP) are produced from a saturated aqueous solution of LAP by rotating seed crystals of LAP in the solution while maintaining the pH of the solution at 2-8, preferably at 2-3 while lowering the temperature of the solution at a rate of 0.01.degree. C.-1.degree. C. until crystallization is completed.

REFERENCES:
Aoki, Acta Cryst., Sect. B, 27(1) pp. 11-23 (1971).
Min-hua, VII International Conference on Crystal Growth, Stuttgart, Germany, pp. 12-16 (1983).
Kirk-Othmer, "Encyclopedia of Chemical Technology," vol. 6, pp. 482-498 +513-515 (1965).
Loiacono, J. Crystal Growth, 46 pp. 105-111 (1979).
Delfino, J. Solid State Chem., 20 pp. 391-395 (1977).
Finar, "Organic Chemistry," vol. 1, pp. 61-62 (1973).

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