Method of improving the thermal stability of quaternary ammonium hydroxides (PNE-539)
US5124054A · kind A · utility
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6References
36Claims
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Key dates
| Filing date | Dec 29, 1988 |
| Grant date | Jun 23, 1992 |
| Priority date | — |
| Expiry date | Dec 29, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/28
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The presence of a minor amount of an anti-oxidant, a metal detergent, a dispersant or mixtures thereof in a hydrocarbon liquid containing certain quaternary ammonium hydroxides has been found to be effective in improving the thermal stability of the hydroxides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.