METHOD FOR COOLING MELANIN Russian patent published in 2004 - IPC

Abstract RU 2225863 C2

FIELD: chemical technology. SUBSTANCE: invention relates to method for cooling liquid melanin prepared by synthesis of melanin from urea. Melanin melt is placed into reactor with fluidized layer consisting of solid melanin particles and maintained with gaseous ammonia at temperature of fluidized layer from 100 to 340 C and under pressure from 1.5 to 100 bars followed by decompression. EFFECT: improved cooling method. 8 cl, 1 ex

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RU 2 225 863 C2

Authors

Koufal' Gerkhard

Dates

2004-03-20—Published

1999-01-20—Filed