Process for the crystalline precipitation of chromogens

Details Process for the crystalline precipitation of chromogens Process for the crystalline precipitation of chromogens

1980-04-03

1981-10-20

Garris, Bradley

Chemistry: physical processes

Physical processes

Crystallization

23295R, 23300, 260707, 427 2, B01D 902, G01N 3315

Patent

active

042958571

ABSTRACT:
The invention contemplates a process for the crystalline precipitation of a chromogen from solution thereof in a solvent and within a capillary. The process involves first initiating a course of crystalline precipitation of the chromogen by initially and locally supersaturating the solution within the capillary, and thereafter evaporating the solvent at a rate and in an environment sufficient for further crystallization to proceed unimpeded by local supersaturation.

REFERENCES:
patent: 3898982 (1975-08-01), Katsuda
patent: 4045125 (1977-08-01), Weber

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