Fluid treatment process
US6358895B1 · kind B1 · utility
3Cited by
10References
29Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 16, 1997 |
| Grant date | Mar 19, 2002 |
| Priority date | — |
| Expiry date | Sep 16, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J41/04
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Non-aqueous functional fluids are treated to avoid degradation or to recondition degraded fluids by a process which comprises contacting the fluid with an anionic ion-exchange resin and subsequently removing water by vacuum dehydration. The fluids can be restored and maintained at a water content of less than 0.1% w/w and an acid number of less than 0.2 mgKOH/gm. The fluid is preferably a triaryl phosphate based fluid. Treated fluids may exhibit improved properties especially increased resistivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.