A STUDY OF TWO-STEP SYNTHESIS OF METHYL METHACRYLATE FROM ISOBUTENE

Abstract

Abstract: Compound oxide catalyst for isobutene selective oxidation to methacrolein (MAL) and supported noble metal catalyst for MAL oxidative esterification to methyl methacrylate (MMA) were prepared, and a new process for two-step synthesis of MMA from isobutene was developed. For isobutene to MAL process, under a reaction temperature of 380 ℃ and a reaction pressure of 0.03 MPa, the average conversion of isobutene and the average selectivity of MAL reached 93.7% and 92.3%, respectively. For MAL to MMA process, under a reaction temperature of 90 ℃ and a reaction pressure of 0.27 MPa, in batch reaction mode, the MAL average conversion and the average selectivity of MMA was 93.35% and 83.50%, respectively; under two-stage continuous operation mode, the MAL average conversion and the average selectivity of MMA was 93.24% and 80.06%, respectively.

Key words: isobutene, oxidation, esterification, methyl methacrylate

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A STUDY OF TWO-STEP SYNTHESIS OF METHYL METHACRYLATE FROM ISOBUTENE

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