FIELD: chemistry.
SUBSTANCE: invention relates to a process for the preparation of methyl methacrylate which comprises the following steps: A) preparation of methacrolein from propionaldehyde and formaldehyde, and B) converting the methacrolein obtained in step A) using methanol via oxidative esterification to methyl methacrylate, wherein steps A) and B) are carried out in a liquid phase at a pressure of 2 to 100 bar, wherein step B) is carried out in the presence of a noble metal-containing heterogeneous catalyst comprising metals and / or metal oxides. Method enables to significantly reduce the number and volumes of backflows.
EFFECT: by-products can be easily separated, which allows the process to be carried out with high yield without the need for expensive purification operations.
17 cl, 3 dwg, 3 tbl, 8 ex
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