Method prepares mono- or dicarboxylic acids aliphatic or aromatic

摘要

The present invention discloses the aliphatic or aromatic monosaccharide of preparation process a kind of or the dicarboxylic acids with 4 to 22 carbon atoms, when aoxidizing corresponding aldehyde has the carbon atom of identical quantity, these are substantially by preparation process, because aliphatic or aromatic aldehyde used has one or two aldehyde, hemiacetal or acetal radical can be used and carry out oxidation carboxylic acid in the mixture of this aldehyde sum and be selected from formic acid, acetic acid and propionic acid, the mixture and water of carboxylic acid are about 50 to about 130 degC in temperature, and pressure is from 0.1 to 2.5 MPa, in the presence of an oxidizer and in catalyst.