Manufacture of substantially pure monochloroacetic acid

US8101798B2 · kind B2 · utility

Assignee

• Buss ChemTech AG · CH

Inventors

• Roxana Stoenescu Timmermans · Basel, CH
• Gerhard Kettenbach · Weil am Rhein, DE

Key dates

• Filing date: Aug 28, 2007
• Grant date: Jan 24, 2012
• Expiry date: Nov 1, 2027

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C51/377
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the manufacture of substantially pure monochloroacetic acid from a liquid chloroacetic acid mixture comprising monochloroacetic acid and dichloroacetic acid, in particular in an amount of 2 to 40 percent by weight, wherein said mixture, further mixed with a suspended hydrogenation catalyst, is mixed with hydrogen gas and the resulting mixture is brought to reaction in a reactor, which is characterized in that the reactor is a loop reactor comprising a gas and liquid recirculation system coupled via an ejector mixing nozzle, in which reactor the gas and liquid are circulated in co-current flow, and the mixing intensity introduced to the liquid phase is at least 50 W/l of liquid phase.