Composite adsorbent for removing acids from organophosphate functional fluids

摘要

A composite adsorbent useful for reducing the acidity and moisture content of used organophosphate functional fluids. The adsorbent is a powder having an average particle size of about 20-500 microns and total pore volume of at least about 0.40 cm3/g and it comprises about 40-90 wt % alumina and about 10-60 wt % Y zeolite wherein the molar ratio of SiO2 to Al2O3 is about 4.5-6.0. The adsorbent is preferably produced by agglomerating particles of activated alumina and Y zeolite into a composite agglomerate, aging the agglomerate and then comminuting to form a powder.