Process for separating and purifying substances by crystallizati

Details Process for separating and purifying substances by crystallizati Process for separating and purifying substances by crystallizati

1994-04-20

1995-09-05

Straub, Gary P.

Chemistry: physical processes

Physical processes

Crystallization

585816, 208319, 23308R, B01D 900, C07C 714, C10G 2100

Patent

active

054475422

ABSTRACT:
In the process for separating and purifying substances by crystallization from the melt under pressure, the melt is subjected to pressure under an inert gas atmosphere and then cooled, whereupon it crystallizes. The residual melt is separated from the resulting crystals, after which the crystals are degassed by reducing the pressure and are caused to sweat, and the sweat oil is separated off.

REFERENCES:
patent: 3592016 (1971-07-01), Blight
Patent Abstracts of Japan, vol. 13, No. 336 (C-623) (3684), Jul. 27, 1989, Abstract No. 1-115404 which relates to DE 21 35 539.
German Abstract No. 2158754 which relates to DE 21 58 754.

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