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Reduction process of aldehyde byproducts using highly active and highly selective catalysts in acryl 发明申请

2023-03-20 1790 1000K 0

专利信息

申请日期 2025-07-12 申请号 KR1020217038839
公开(公告)号 KR1020220004141A 公开(公告)日 2022-01-11
公开国别 KR 申请人省市代码 全国
申请人 DOW GLOBAL TECHNOLOGIES LLC; ROHM HAAS
简介 A catalyst composition comprises an acrolein-oxidizing catalyst comprising a mixed metal oxide catalyst of general formula (I) : MoVaA1 bA2 cA3 dOm in which A1 comprises at least one element selected from the group consisting of W and Cu; A2 comprises at least one element selected from the group consisting of Sb, Fe, and Nb; A3 comprises at least one element selected from the group consisting of Y, Ti, Zr, Hf, Ta, Cr, Mn, Re, Ru, Co, Rh, Ir, Ni, Pd, Pt, Ag, Au, Zn, B, Al, Ga, In, Ge, Sn, Si, Te, Pb, P, As, Bi, Se, rare earth elements, alkaline elements, and alkaline earth elements; a ranges from 0.01 to 1.0; b ranges from 0.01 to 1.5; c ranges from 0 to 1.5; d ranges from 0 to 1.0; and m is dependent on the oxidation state of the other elements. The catalyst composition further comprises a finishing catalyst comprising a mixed metal oxide catalyst of general formula (II) : MoVwNbxX1 y X2 zOn in which X1 comprises at least one element selected from the group consisting of Te and Sb; X2 comprises at least one an element selected from the group consisting of Y, Ti, Zr, Hf, Nb, Ta, Cr, Mn, Re, Fe, Ru, Co, Rh, Ir, Ni, Pd, Pt, Ag, Au, Zn, B, Al, Ga, In, Ge, Sn, Pb, P, As, Bi, Se, rare earth elements and alkaline earth elements; w ranges from 0.01 to 1.0; x ranges from 0.01 to 1.0; y ranges from 0.01 to 1.0; z ranges from 0 to 1.0; and n is depended on the oxidation state of the other elements. The finishing catalyst does not contain W or Cu, and has an X-ray diffraction pattern showing an orthorhombic phase as the major crystal phase with main peaks with 2θ at 6.7°, 7.8°, 22.1°, and 27.2°. The acrolein-oxidizing catalyst has a different chemical composition than the finishing catalyst. A process for producing acrylic acid is also disclosed.


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