| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a catalyst for producing a methacrylic acid ester in high yield by a gas-phase catalytic reaction of a propionic acid ester and formaldehyde and/or derivatives of formaldehyde, to provide a production method thereof and to provide a production method for producing the methacrylic acid ester in high yield. <P>SOLUTION: The catalyst for producing the methacrylic acid ester by the gas-phase catalytic reaction of the propionic acid ester and formaldehyde and/or derivatives of formaldehyde has a composition shown by a formula (1), wherein a silicon source having Na of ≤0.2 atom of Na per 100 atoms of Si is used as the Si source. Si<SB>a</SB>Cs<SB>b</SB>O<SB>d</SB>(1) (in the formula (1), Si, Cs and O represent silicon, cesium and oxygen, respectively, and a, b and d represent each atomic ratio, b is 0.01-5 when a is 100, and d is an oxygen atomic ratio required to satisfy valences of other components.). <P>COPYRIGHT: (C)2005,JPO&NCIPI |
