Patent · US Active

Lubricating oil

US7632900B1 · kind B1 · utility

2Cited by

13References

7Claims

0Family size

Assignee

Equistar Chemicals, LP · US

Inventors

Stephen M. Imfeld · Mason, US
Robert L. Sherman, JR. · Blue Ash, US
Andrew Lake · Alvin, US

Key dates

Filing date	Dec 18, 2008
Grant date	Dec 15, 2009
Priority date	—
Expiry date	Dec 18, 2028

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC10N2040/30
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

A lubricating oil suitable for use in α-olefin compressors and a high-pressure ethylene polymerization process is disclosed. The oil comprises a base fluid and a hindered C6-C30 alkyl 4-hydroxybenzoate. The hindered C6-C30 alkyl 4-hydroxybenzoate stabilizes the lubricating oil and does not interfere with the high-pressure α-olefin polymerization.

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