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US 4,402,883 AGranted
Reclamation of organophosphate fluids
AssigneeStauffer Chemical Company
InventorJoseph F. Anzenberger, Sr.
Life of this patent
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Abstract
Acidity of used organophosphate containing functional fluids is reduced by contact with activated alumina. The activated alumina is regenerated for reuse by a sequential leaching/heating process.
Claims8
A method of reducing the acidity of used organophosphate functional fluids by contact with activated alumina, directly returning said activated alumina contacted fluid for reuse, and subsequently regenerating the acid-reducing alumina which comprises the sequential steps of:
- (A) contacting said used organophosphate with an acid reducing amount of acid reducing agent consisting essentially of activated alumina,
- (B) separating the alumina of step (A) from the organophosphate
- (C) leaching the alumina of step (B) with a polar organic solvent,
- (D) separating the alumina of step (C) from the leachate and thereafter heating the alumina at a temperature of less than 160.degree. C.
1 more element
Dependencies are inferred from the claim text.