Regeneration of phosphate ester lubricating fluids
OwnerPeter Dufresneinventor
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Abstract
A method of removing contaminated phosphate ester materials is provided. The method involves the use of an anionic resin and a polymeric sorbent. The contaminated phosphate ester material is passed into contact with the anionic resin and optionally the sorbent. The method is particularly useful since it removes substantially all of the contaminants, generally metal material and acids, from the phosphate ester such that the phosphate ester can be reused for further applications.
Claims16
A method of cleansing a phosphate ester lubricant fluid contaminated with metal material and phosphorous based acids to a new fluid quality having a total acid number of 0.03, said method consisting essentially of:
- providing a source of phosphate ester lubricant contaminated with at least one metal selected from the group consisting of aluminum, chromium, tin, iron, sodium, calcium, magnesium and silicon and phosphorous based acids;
- providing a source of an anionic resin;
- passing said phosphate ester lubricant fluid contaminated with said metal and said acids into contact with said resin;
- and
- removing said metal compounds and said acids with said resin to provide a substantially contaminant free reusable lubricatant fluid of a new fluid quality having a total acid number of 0.03.
A method of regenerating a phosphate ester lubricatant fluid contaminated with metal material selected from the group consisting of aluminum, chromium, tin, iron, sodium, calcium, magnesium and silicon and phosphorous based acidified contaminants to new fluid quality having a total acid number of 0.03, consisting essentially of:
- providing a source of a polystyrene anionic resin;
- passing said contaminated fluid into contact with said polystyrene anionic resin to remove said metal material and said acidified contaminants to regenerate said lubricating fluid to a substantially contaminant free reusable lubricating fluid of a new fluid quality having a total acid number of 0.03.
Dependencies are inferred from the claim text.