Process for the purification of benzaldehyde
AssigneeStamicarbon B.V.
InventorCornelis Jongsma
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Abstract
A process for purification of impure benzaldehyde by which purified benzaldehyde is prepared which has improved color stability and improved olfactory characteristics. The process is comprised of the steps of treatment with hydrogen in the presence of a hydrogenation catalyst followed by distillation. The present invention is a new and novel process for the purification of benzaldehyde and, is in particular, a unique and novel process for the purification of benzaldehyde prepared by the oxidation of toluene with a gas containing molecular oxygen.
Claims13
Process for the purification of impure benzaldehyde including odiferous impurities comprising the steps of:
- (a) treating impure benzaldehyde including odiferous impurities with hydrogen in the presence of a hydrogenation catalyst at conditions of temperature and pressure sufficient to selectively hydrogenate said impurities without hydrogenating said benzaldehyde;
- and
- (b) distilling said treated benzaldehyde.
Dependencies are inferred from the claim text.