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US 6,364,914 B1Granted
Method of crystallization with the particle size distribution being controlled
AssigneeAjinomoto Co., Inc.
InventorsHiroshi Ueda, Hiroshi Fukushi, Muneyuki Ozawa
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Abstract
Herein is disclosed a method of crystallization with the particle size distribution being controlled, characterized in that while crystals are being precipitated by vacuum concentration crystallization, the temperature of the slurry is periodically varied up and down during the concentration of the crystallization mother liquor (i.e., the slurry), which method is an excellent one free from the defects of the conventional methods.
Claims15
A method of controlling the particle size distribution of crystals by crystallization, comprising:
- precipitating crystals from a slurry by vacuum concentration crystallization, and
- periodically varying the temperature of said slurry upwards and downwards within a fixed temperature range during said vacuum crystallization concentration;
- wherein
- said temperature is varied by adjusting the pressure in said vacuum concentration crystallization.
1 more element
Dependencies are inferred from the claim text.