The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 28, 1989
Filed:
Dec. 28, 1987
Hubert L Fleming, Mars, PA (US);
Aluminum Company of America, Pittsburgh, PA (US);
Abstract
A method for reducing the acidity and moisture content of used organophosphate functional fluids. The used functional fluid is contacted with a solid composite adsorbent and then separated from the adsorbent. The composite adsorbent is preferably a powder having an average particle size of about 20-500 microns and total pore volume of at least about 0.40 cm.sup.3 /g and it comprises about 40-90 wt % alumina and about 10-60 wt % Y zeolite wherein the molar ratio of SiO.sub.2 to Al.sub.2 O.sub.3 is about 4.5-6.0. The adsorbent is produced by agglomerating particles of activated alumina and Y zeolite into a composite agglomerate, aging the agglomerate, activating at an elevated temperature, and then comminuting to form a powder.