Method and apparatus for taking sample

US6037184A · kind A · utility

Assignee

• Borealis Polymers Oy · FI

Inventors

• Kari Matilainen · Porvoo, FI
• Ari Palmroos · Kerava, FI
• Auli Nummila-Pakarinen · Porvoo, FI
• Markku SAVOLAINEN · Lebanon, US
• Timo Blomqvist · Porvoo, FI
• Jouni Takakarhu · Avenue Madeleine, DK
• Klaus Nyfors · Porvoo, FI

Key dates

• Filing date: Nov 10, 1997
• Grant date: Mar 14, 2000
• Expiry date: Nov 10, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T436/25875
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method and apparatus for taking a sample from a flowing suspension formed by polymer particles and hydrocarbon diluent in a olefin polymerization process including at least one filter situated at a plane of an inside surface of a transfer conduit between reactors. Each filter includes perforations or pores having a size to prevent substantially any of the catalyst used in the polymerization process from passing through the filter, e.g., smaller than the smallest particle size of a catalyst used in the polymerization process. The pore or perforation size of each filter is preferably 0.1-10 .mu.m, preferably between 0.2-1 .mu.m. A pressure difference permits at least partial vaporization of the sample as it passes through the filter.