Title:
PROCESS FOR PREPARING MONOCHLOROACETIC ACID
Document Type and Number:
WIPO Patent Application WO2003048098
Kind Code:
A3
Abstract:
The invention relates to a process for preparing monochloroacetic acid (MCA) comprising a chlorination step and a hydrogenation step and is characterized in that said process comprises the removal of aldehydes from a process stream by peroxidation using a peroxycarboxylic acid. A preferred peroxycarboxylic acid comprises peracetic acid. Preferably, the process is carried out at a temperature of 60-100 °C, most preferably at atmospheric pressure. Preferably, an about equimolar amount of peroxycarboxylic acid is used relative to the molar amount of aldehydes present in the process stream. A practical choice for the process stream is the acetic acid recycle stream. The invention process provides a clear and colourless MCA end product.
Inventors:
KOOIJMAN CORNELIS (NL)
AALDERING JACOBUS THEODORUS JO (NL)
AALDERING JACOBUS THEODORUS JO (NL)
Application Number:
PCT/EP2002/012944
Publication Date:
March 04, 2004
Filing Date:
November 19, 2002
Export Citation:
Assignee:
AKZO NOBEL NV (NL)
KOOIJMAN CORNELIS (NL)
AALDERING JACOBUS THEODORUS JO (NL)
KOOIJMAN CORNELIS (NL)
AALDERING JACOBUS THEODORUS JO (NL)
International Classes:
C07C51/285; C07C51/363; C07C51/377; C07C51/42; C07C51/487; C07C53/16; (IPC1-7): C07C51/363; C07C51/377; C07C51/487; C07C51/42; C07C53/16; C07C51/285
Foreign References:
| US3393235A | 1968-07-16 | |||
| GB1456057A | 1976-11-17 | |||
| US5756840A | 1998-05-26 |
Other References:
DATABASE WPI Section Ch Week 199302, Derwent World Patents Index; Class E13, AN 1993-012163, XP002197250
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