Process for the production of medicinal white oil
US6187176A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 1997 |
| Grant date | Feb 13, 2001 |
| Priority date | — |
| Expiry date | Aug 22, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G2400/14
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A three stage process for producing high quality white oils, particularly food grade mineral oils from mineral oil distillates. The first reaction stage preferably employs a sulfur resistant hydrotreating catalyst and produces a product suitable for use as a high quality lubricating oil base stock. The second reaction stage preferably employs a hydrogenation/hydrodesulfurization catalyst combined with a sulfur sorbent and produces a product stream which is low in aromatics and which has substantially "nil" sulfur. The final reaction stage employs a selective hydrogenation catalyst that produces a product suitable as a food grade white oil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.