Process for producing methacrylic acid
AssigneeMitsubishi Rayon Co., Ltd.
InventorsSeigo Watanabe, Motomu Oh-Kita
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Abstract
In a method of producing methacrylic acid by passing a material gas containing methacrolein, oxygen and water vapor through a reactor packed with a catalyst containing as the main component a compound oxide containing molybdenum and phosphorus, a concentration of methacrolein in the material gas is controlled in a range of 4 to 6.5 vol %, a molar ratio of the water vapor to the methacrolein in the material gas is controlled in a range of 1 to 2, and a space velocity of the material gas to the catalyst-packed layer is controlled in a range of 500 to 750 h−1, whereby deterioration of the catalyst is effectively inhibited.
Claims5
A method of producing methacrylic acid by passing a material gas containing methacrolein, oxygen and water vapor through a reactor packed with a catalyst containing as the main component a compound oxide containing molybdenum and phosphorus,
- wherein a concentration of methacrolein in the material gas is in a range of 4 to 6.5 vol %,
- a molar ratio of the water vapor to the methacrolein in the material gas is in a range of 1 to 2, and
- a space velocity of the material gas to the catalyst-packed layer is in a range of 500 to 750 h−1.
Dependencies are inferred from the claim text.