Patent · US Expired

Process for regenerating used lubricating oils

US3990963A · kind A · utility

21Cited by

1References

19Claims

0Family size

Assignee

Institut Francais du Petrole des Carburants et Lubricants et Enterprise de Recherches et d'Activities Petroliers Elf · FR

Inventors

Francois Audibert · Écully, FR
Maurice Born · Nanterre, FR
Daniel Defives · Paris, FR
Xavier Marze · Lyon, FR

Key dates

Filing date	Feb 28, 1975
Grant date	Nov 9, 1976
Priority date	—
Expiry date	Feb 28, 1995

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D71/76
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Used lubricating oils are first heated to 200.degree.-500.degree. C, optionally with added steam, and then filtered through a membrane such as an ultra-filtration membrane. The latter has preferably a cut range of from 5,000 to 300,000.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.