Economic combinative solvent and catalytic dewaxing process employing methylisopropyl ketone as the solvent and a silicate-based catalyst
US4622130A · kind A · utility
20Cited by
19References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 9, 1985 |
| Grant date | Nov 11, 1986 |
| Priority date | — |
| Expiry date | Dec 9, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G67/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
This invention discloses an economic series flow dewaxing scheme having a first solvent dewaxing step followed by a catalytic dewaxing step. The use of methylisopropyl ketone as a key component in the solvent dewaxing step produces a solvent dewaxed effluent with an intermediate pour point which may be readily catalytically dewaxed to a pour point suitable for lubricant applications. The catalytic dewaxing unit can also be used to recover lost oil yield from the soft wax product of the solvent dewaxing zone (sometimes referred to as footsoil) and thereby sustain, if not increase, overall lubricating oil yield.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.