A kind of method of methyl methacrylate coproducing methyl allyl alcohol

A kind of method of methyl methacrylate coproducing methyl allyl alcohol

  • CN 107,266,290 A
  • Filed: 07/20/2017
  • Published: 10/20/2017
  • Est. Priority Date: 07/20/2017
  • Status: Active Application
First Claim
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1. a kind of method of methyl methacrylate coproducing methyl allyl alcohol, using the tert-butyl alcohol or isobutene as raw material, it is characterized in that,Comprise the following steps:



  • 1)

    The raw material tert-butyl alcohol or isobutene are well mixed in reactor with air, oxidation production metering systemAldehyde and methacrylic acid mixed gas, through the thick metering system of the absorption of system later and the isolated content of rectifying for 60-92%The crude methacrylic acid intermediate products of aldehyde and 10-40%;



    2)

    Crude methacrylic acid intermediate products are by extraction, esterification and essenceEvaporate, obtain the methyl methacrylate product that purity is more than 99.9% professional standard;



    3)

    Thick MAL is by extraction, azeotropicDistillation operation, obtains the MAL product that purity is more than more than 99%;



    4)

    MAL product is passed through in hydrogenation reactorCross catalyst catalysis carry out selective hydrogenation, obtain methallyl alcohol mixture, through pervaporation, rectifying obtain 99.5% withOn methallyl alcohol product.

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