Mineral oils: processes and products – Paraffin wax; treatment or recovery – Separation of paraffin from oil
Patent
1981-05-13
1983-01-11
Williams, Howard S.
Mineral oils: processes and products
Paraffin wax; treatment or recovery
Separation of paraffin from oil
208308, 208321, C10G 7308
Patent
active
043681123
ABSTRACT:
A warm-up deoiling process for lube oil slack wax wherein cold slack wax from a solvent dewaxing operation is warmed up and mixed with solvent to dissolve foots oil contained therein and passed to a rotary drum filter to recover solid wax and a filtrate comprising a solution of foots oil and solvent wherein said filtrate is contacted with one side of a semi-permeable membrane made from regenerated cellulose which selectivity permeates at least a portion of solvent through said membrane and recycling the permeated solvent directly back into the warm-up deoiling operation as part of the solvent mixed with the slack wax.
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Gudelis David A.
Shaw David H.
Thompson John A.
Allocca Joseph J.
Exxon Research and Engineering Co.
Leader William
Williams Howard S.
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