Fuels and Combustion by Samir Sarkar

Author:Samir Sarkar [Sarkar, Samir]
Language: eng
Format: epub
Publisher: Universities Press
Published: 0101-01-01T00:00:00+00:00

Deoiling

A large quantity of oil is left in the crude waxes produced in dewaxing processes. The oil content may be as high as 50% if the chilling is done without a solvent. Hence the importance of the deoiling process. A finished wax should not contain more than 0.5% oil. There are three types of deoiling processes, namely sweating, resettling and solvent extraction.

In the sweating process, the crude wax, slack wax, is melted and cast into thick sheets. These sheets are then subjected to slow heating on pans with a perforated false bottom. As the temperature rises, a mixture of oil and low-melting wax drains out. The heating is continued until the remaining wax has the desired melting point. The sweating process may be repeated for the production of good quality wax.

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