Composite adsorbent for removing acids from organophosphate functional fluids
US4751211A · kind A · utility
10Cited by
6References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 7, 1986 |
| Grant date | Jun 14, 1988 |
| Priority date | — |
| Expiry date | Aug 7, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J20/08
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
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 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 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.