solvent dewaxing

solvent dewaxing

[′säl·vənt di‚waks·iŋ]
(chemical engineering)
A petroleum refinery process for solvent removal of wax from oils; the mixture of waxy oil and solvent is chilled, then filtered or centrifuged to remove the precipitated oil; the solvent is recovered for reuse.
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For example, solvent dewaxing chills the waxy raffinate so that the crystallized wax can be removed through filtration.