Process for converting waste plastic into lubricating oils
US6822126B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 18, 2002 |
| Grant date | Nov 23, 2004 |
| Priority date | — |
| Expiry date | Jun 1, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S208/95
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Provided is a continuous process for converting waste or virgin plastics into lube oils. The plastic feed is maintained in a heater at preferred temperatures of 150° C.-350° C. The feed is continuously passed to a pyrolysis reactor preferably maintained at a temperature of 450° C.-700° C. and at atmospheric pressure. Relatively short residence times are employed. Optionally, the reactor effluent is processed in a hydrotreating unit. The effluent is fed to an isomerization dewaxing unit and fractionated to recover lube oil stocks. Preferably, the feed to the pyrolysis reactor can be a blend of waste plastic and waxy Fischer-Tropsch fractions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.