Process for the production of polyolefins in an autoclave reactor

US5965674A · kind A · utility

Assignee

• Borealis A/S · DK

Inventors

• Oivind Moen · Sannidal, NO
• Mangor Lien · Stathelle, NO
• Lars Bjornar Lyngmo · Stathelle, NO
• Kurt Strand · Saupstad, NO
• Havard Nordhus · Trondheim, NO
• Peter Singstad · Trondheim, NO
• Jan Kjeldstad · Kolbotn, NO

Key dates

• Filing date: Jul 24, 1996
• Grant date: Oct 12, 1999
• Expiry date: Jul 24, 2016

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2219/1943
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

An improved process for the production of polyolefins in an autoclave reactor having several reaction zones operated at a pressure of 100 to 300 MPa and a temperature of 100 to 300.degree. C. is disclosed. Dunng operation, temperatures are measured continuously inside the autoclave reactor at specific points distributed along the reactor length, each of said measured temperatures is compared with a corresponding preset temperature and the detected deviation between each pair of preset and measured temperatures is used in regulating the amount of monomer and initiator fed into the autoclave through several feed inlets distributed along the reactor length, in order to minimize the temperature deviations and thus obtain an improved control of the polymerization process.