Distillation: processes – separatory – With chemical reaction – Including step of adding catalyst or reacting material
Patent
1978-05-01
1980-10-14
Bascomb, Jr., Wilbur L.
Distillation: processes, separatory
With chemical reaction
Including step of adding catalyst or reacting material
203 80, 203 89, 203 91, 203 72, 203 39, 72 42, 252 325, 260990, B01D 122, B01D 328, C10M 144
Patent
active
042279720
ABSTRACT:
Disclosed herein is a process for recovering a phosphate ester type hydraulic fluid from a waste liquid containing water, organic solvents and other impurities, such as polychlorinated biphenyls (PCB). After filtering to remove particulate matter, a heavy fraction separated from the waste liquid and consisting primarily of the hydraulic fluid is first subjected to a distillation step. A substantial portion of the PCB is removed as overhead from the distillation step and the bottoms containing the hydraulic fluid is subsequently evaporated, preferably in a thin film evaporator. The overhead from the evaporation step is condensed to recover the hydraulic fluid.
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patent: 3679550 (1972-07-01), Orwoll
patent: 3945891 (1976-03-01), Aal et al.
patent: 4016048 (1977-04-01), Gerhmann et al.
patent: 4092378 (1978-05-01), Damiani et al.
patent: 4138346 (1979-02-01), Nassry et al.
Hernandez Pablo M.
Luplow William J.
Bascomb, Jr. Wilbur L.
Outboard Marine Corporation
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