Treating spent filter media

Details Treating spent filter media Treating spent filter media

1986-01-13

1987-12-08

Castel, Benoit

Liquid purification or separation

Processes

Separating

210792, 210794, 210797, 210671, 134 40, 134 251, B01D 4102

Patent

active

047117281

ABSTRACT:
A process for removing sorbed lubricating oil additives from siliceous filter material is provided. The process comprises forming a slurry of the additive-laden siliceous filter material and an aromatic solvent. Water is added to the slurry prior to separating the siliceous filter material from the slurry. The recovered filter material is substantially additive-free. The lubricating oil additives may be optionally recovered from the aromatic solvent by appropriate means such as distillation.

REFERENCES:
patent: 2367384 (1945-01-01), Tymstra et al.
patent: 3574329 (1971-04-01), Beavon
patent: 3803031 (1974-04-01), Keller, Jr.
patent: 4104163 (1978-08-01), Grutsch
patent: 4256578 (1981-03-01), Kozar
patent: 4260489 (1981-04-01), Greig et al.
patent: 4501670 (1985-02-01), Tyson et al.
patent: 4544491 (1985-10-01), Tyson et al.

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