ISSN:
0001-1541
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
In the rotary drum crystallizer, solids are deposited from a molten liquid mixture on the cooled surface of a drum. Rotation of the drum carries the solids from the melt to a scraper blade which removes the crystal deposit in a liquid free, convenient form. The object of this investigation was to obtain data on the separation of binary mixtures over a range of melt temperature, drum coolant temperature, drum rotational rate, concentration of impurity in the liquid, and agitation of the liquid. Four systems were studied: naphthalene-benzoic acid, beta-naphthol-naphthalene, p-xylene-m-xylene, water-sodium chloride.The experimental results show that separation improved with increasing agitation, increasing coolant temperature, decreasing drum speed, and decreasing liquid impurity. For the naphthalene-benzoic acid system, the major system studied, the maximum stage efficiency was 96%. The results indicate that the vigor of agitation and the drum coolant temperature are the two most important variables which affect the separation. It was possible to calculate the rate of solid deposition with heat transfer data.The rotary drum crystallizer appears to be an effective device for industrial separation of organic chemicals.
Additional Material:
10 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/aic.690100124
