Material for a facility for the production of anhydrous formic acid

US7241365B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Heinz Auer · Neulußheim, DE
• Bernd Bessling · Grünstadt, DE
• Hans Hammer · Mannheim, DE
• Hans Hasse · Kaiserslautern, DE
• Friedrich Sauer · Grünstadt, DE
• Maximilian Vicari · Schifferstadt, DE
• Gerhard Wagner · Brookline, US
• Till Adrian · Frankenthal (Pfalz), DE

Key dates

• Filing date: Jan 24, 2001
• Grant date: Jul 10, 2007
• Expiry date: Jan 24, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C38/42
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention relates to an apparatus and a process for the preparation of anhydrous or substantially anhydrous formic acid. This apparatus is constructed partly or entirely of substantially zirconium-free materials. The extractant employed is a liquid of the general formula Iwhere the radicals R1 and R2 are alkyl, cycloalkyl, aryl or aralkyl groups, or R1 and R2 jointly, together with the N atom, form a heterocyclic 5- or 6-membered ring, and only one of the radicals is an aryl group, and where R3 is hydrogen or a C1–C4-alkyl group. The apparatus has a synthesis reactor (6), a hydrolysis reactor (1), three distillation devices (2,4,5) and an extraction device (3).