Patent · US Expired

Process optimization of peroxide injection during polyethylene production

US6384153B2 · kind B2 · utility

3Cited by

1References

7Claims

0Family size

Assignee

BASF SE

Inventors

Klaus-Dieter Hammer · Mainz, DE
Georg Groos · Schifferstadt, DE
Michael Stenger · Telgte, DE
Wilhelm Weber · Neustadt, DE
Andreas Deckers · Flomborn, DE

Key dates

Filing date	Jun 27, 2001
Grant date	May 7, 2002
Priority date	—
Expiry date	Jun 27, 2021

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F10/02
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

In a process for the high-pressure polymerization of ethylene in a high-pressure autoclave or in a high-pressure tube reactor having one or more metering points for one or more peroxides, no peroxide or a reduced amount of peroxide is metered in during the time interval in which the pressure is lowered by opening a pressure maintenance valve and the original amount of peroxide per unit time is metered in again as soon as the pressure after closure of the pressure maintenance valve has built up again so that it exceeds 90% of the pressure difference between nominal pressure and lowered pressure.

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