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AssigneeLucite International UK Limited
InventorsDavid William Johnson, Sabina Ziemian
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The invention relates to a catalyst for the reaction of formaldehyde with a carboxylic acid or ester to produce an ethylenically unsaturated carboxylic acid or ester, preferably α, β ethylenically unsaturated carboxylic acids or ester. The catalyst includes a metal oxide having at least two types of metal cations, M1 and M2, wherein M1 is at least one metal selected from group 3 or 4 in the 4th to 6th periods of the periodic table, group 13 in the 3rd to 5th periods of the periodic table, or the remaining elements in the lanthanide series and M2 is at least one metal selected from group 5 in the 5th or 6th periods of the periodic table or group 15 in the 4th or 5th periods of the periodic table. The production includes reacting formaldehyde with a carboxylic acid or esterin the presence of the catalyst effective to catalyze the reaction.
A catalyst for the reaction of a suitable source of formaldehyde with a carboxylic acid or ester to produce an ethylenically unsaturated carboxylic acid or ester, wherein the catalyst comprises a metal oxide having at least two metal cations, M1 and M2, wherein M1 is at least one metal selected from group 3 or 4 in the 4th to 6th periods of the periodic table, group 13 in the 4th to 5th periods of the periodic table, or the remaining elements in the lanthanide series including scandium, yttrium, the lanthanide elements, titanium, zirconium, hafnium, gallium, and indium and M2 is at least one metal selected from group 5 in the 5th or 6th periods of the periodic table or group 15 in the 4th or 5th periods of the periodic table including niobium, tantalum, arsenic, and antimony and optionally, M3 or M4, wherein M3 is selected from groups 1 and 2 of the periodic table and M4 is selected from group 14 of the periodic table, wherein the ratio M1:M2 is in the range of from 5:1 to 1:5, and wherein the metal oxide catalyst compound of the invention does not include other metal types above a level 0.1 mol % other than the types M1, M2, M3, or M4.
A catalyst for the reaction of a suitable source of formaldehyde with a carboxylic acid or ester to produce an ethylenically unsaturated carboxylic acid or ester, wherein the catalyst comprises a metal oxide having at least two metal cations, M1 and M2, wherein M1 is at least one metal selected from group 3 or 4 in the 4th to 6th periods of the periodic table, group 13 in the 4th to 5th periods of the periodic table, or the remaining elements in the lanthanide series including scandium, yttrium, the lanthanide elements, titanium, zirconium, hafnium, gallium, and indium and M2 is at least one metal selected from group 5 in the 5th or 6th periods of the periodic table or group 15 in the 4th or 5th periods of the periodic table including niobium, tantalum, arsenic, and antimony and at least one of M3 or M4, wherein M3 is selected from groups 1 and 2 of the periodic table and M4 is selected from group 14 of the periodic table, wherein the ratio M1:M2 is in the range of from 5:1 to 1:5, and wherein the metal oxide catalyst compound of the invention does not include other metal types above a level 0.1 mol % other than the types M1, M2, M3, or M4.
Dependencies are inferred from the claim text.