Recovery of a useful polymerizable fraction

US5326927A · kind A · utility

Assignee

• BASF SE

Inventors

• Uwe Stabel · Otterstadt, DE
• Gerd Wunsch · Speyer, DE
• Helmut Woerz · Mannheim, DE
• Andreas Fried · Frankenthal (Pfalz), DE
• Ruediger Kotkamp · Schifferstadt, DE

Key dates

• Filing date: May 4, 1993
• Grant date: Jul 5, 1994
• Expiry date: May 4, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10G7/00
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

In a process for the recovery of a polymerizable useful fraction, consisting of styrene, methylstyrenes, vinyltoluenes, indene, methylindenes and fractions whose boiling points are between styrene and methylindenes, from the crack gases of a steam cracker, the sidestream of the crack gas column is divided, by means of a distillation unit, into the useful fraction and into fractions which are recycled to the crack gas column.