Metering of catalysts

US7527175B2 · kind B2 · utility

Assignee

• Basell Polyolefine GmbH · DE

Inventors

• Hermann Gebhart · Böhl-Iggelheim, DE
• Volker Dolle · Kelkheim, DE
• Angel Sanchez · Milwaukee, US
• Herbert Plotz · Schifferstadt, DE
• Peter Götz · Haßloch, DE
• Franz Langhauser · Bad Dürkheim, DE
• Klaus-Peter Mayer · Ludwigshafen, DE

Key dates

• Filing date: Jan 30, 2002
• Grant date: May 5, 2009
• Expiry date: Oct 15, 2023

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S526/92
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

To meter catalysts into a reactor, the catalyst is firstly suspended in a hydrocarbon in a reservoir and the suspension obtained is kept in motion by stirring and then fed via a three-way metering valve and an ejector into the actual reactor, wherein the suspension containing the catalyst is firstly discharged from the reservoir by means of a pump and continuously circulated by returning the suspension via the three-way metering valve within a closed piping system to the reservoir, subsequently setting a pressure in the reservoir which is from 0.1 to 30 bar higher than the pressure in the reactor and then continuously introducing the suspension into the reactor via a flow meter which controls the three-way metering valve and via a downstream ejector by pulse operation of the now open three-way metering valve.