Process for preparing monochloroacetic acid
AssigneeAkzo Nobel N.V.
InventorsCornelis Kooijman, Jacobus Theodorus Jozef Aaldering
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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 oxidation 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.
Claims9
A process for preparing monochloroacetic acid comprising a chlorination step and a hydrogenation step, said process comprising the removal of aldehydes from a process stream by oxidation using a peroxycarboxylic acid.
Dependencies are inferred from the claim text.