Abstract: A process for continuously removing water in situ from an oxidative esterification reaction is provided. The process includes (a) conducting a first oxidative esterification reaction in a first reactor or reaction zone, wherein the total number of reactors or reaction zones is n and n is at least 2; (b) removing a crude product stream from the first reactor or reaction zone; (c) introducing the crude product stream to a distillation column to generate a column overheads stream and a column bottoms stream; (d) passing a portion of the columns bottoms stream to the product recovery zone; and (e) passing a portion of the column overheads stream to a subsequent reactor or reaction zone. Steps (a)-(e) can be repeated.

Abstract: A process for the preparation of MMA via oxidative esterification in the presence of a catalyst comprising palladium, bismuth, and antimony.

Abstract: A process for removing water from an oxidative esterification reactor includes (a) conducting an oxidative esterification reaction in a reactor; (b) removing a crude product stream from the reactor; (c) passing a first portion of the crude product stream directly to a product recovery zone; (d) introducing a second portion of the crude product stream to a distillation column to generate a column overheads stream and a column bottoms stream; (e) passing at least a portion of the columns bottoms stream to the product recovery zone; and (f) recycling a recycle stream comprising at least a portion of the overheads stream to the reactor; wherein the recycle stream contains less than 1 weight percent (wt %) water based on the total weight of the recycle stream, wherein the weight ratio of the first portion to the second portion is at least 1:10, and wherein the amount of the recycle stream recycled to the reactor is such that the reactor contains less than or equal to 2.

Abstract: A catalyst comprising palladium, bismuth, and at least one third element X selected from the group consisting of P, S, Sc, V, Ga, Se, Y, Nb, Mo, La, Ce, and Nd, wherein the catalyst further comprises a support.

Abstract: A process for preparing dry methacrolein, and a process for producing methyl methacrylate are disclosed.

Abstract: A process for continuously removing water in situ from an oxidative esterification reaction includes (a) conducting a first oxidative esterification reaction in a first reactor or reaction zone, wherein the total number of reactors or reaction zones is n and n is at least 2; (b) removing a crude product stream from the first reactor or reaction zone; (c) introducing the crude product stream to a distillation column to generate a column overheads stream and a column bottoms stream; (d) passing at least a portion of the columns bottoms stream to the product recovery zone; and (e) passing at least a portion of the column overheads stream to a subsequent reactor or reaction zone; and (f) repeating steps (a)-(e) for each subsequent reactor or reaction zone such that the number of distillation columns less than n, and wherein the at least a portion of the column overheads stream contains less than 1 weight percent (wt %) water based on the total weight of the at least a portion of the column overheads stream.

Abstract: A process for removing water from an oxidative esterification reactor includes (a) conducting an oxidative esterification reaction in a reactor; (b) removing a crude product stream from the reactor; (c) passing a first portion of the crude product stream directly to a product recovery zone; (d) introducing a second portion of the crude product stream to a distillation column to generate a column overheads stream and a column bottoms stream; (e) passing at least a portion of the columns bottoms stream to the product recovery zone; and (f) recycling a recycle stream comprising at least a portion of the overheads stream to the reactor; wherein the recycle stream contains less than 1 weight percent (wt %) water based on the total weight of the recycle stream, wherein the weight ratio of the first portion to the second portion is at least 1:10, and wherein the amount of the recycle stream recycled to the reactor is such that the reactor contains less than or equal to 2.

Abstract: A process for the preparation of MMA via oxidative esterification in the presence of a catalyst comprising palladium, bismuth, and antimony.

Abstract: A process for producing methyl methacrylate, the process comprising contacting reactants comprising methacrolein, methanol and an oxygen-containing gas, under reaction conditions in the presence of a solid catalyst comprising palladium, bismuth and at least one third element X, where X is selected from the group consisting of P, S, Sc, V, Ga, Se, Y, Nb, Mo, La, Ce, and Nd, wherein the solid catalyst further comprises a support selected from at least one member of the group consisting of silica, alumina, calcium carbonate, active carbon, zinc oxide, titanium oxide and magnesium oxide.

Abstract: A process for preparing dry methacrolein, and a process for producing methyl methacrylate are disclosed.

Abstract: A process for producing methyl methacrylate, the process comprising contacting reactants comprising methacrolein, methanol and an oxygen-containing gas, under reaction conditions in the presence of a solid catalyst comprising palladium, bismuth and at least one third element X selected from the group consisting of Fe, Zn, Ge, and Pb, wherein the solid catalyst further comprises a support selected from at least one member of the group consisting of silica and alumina.

Abstract: A process for producing methyl methacrylate, the process comprising contacting reactants comprising methacrolein, methanol and an oxygen-containing gas, under reaction conditions in the presence of a solid catalyst comprising palladium, bismuth and tellurium, wherein the solid catalyst further comprises a support selected from at least one member of the group consisting of silica, and alumina, with the proviso that the process produces less than 1 mole methyl formate per mole of methyl methacrylate.

Abstract: A process for producing methyl methacrylate, the process comprising contacting reactants comprising methacrolein, methanol and an oxygen-containing gas, under reaction conditions in the presence of a solid catalyst comprising palladium, bismuth and at least one third element X, where X is selected from the group consisting of P, S, Sc, V, Ga, Se, Y, Nb, Mo, La, Ce, and Nd, wherein the solid catalyst further comprises a support selected from at least one member of the group consisting of silica, alumina, calcium carbonate, active carbon, zinc oxide, titanium oxide and magnesium oxide.

Abstract: A catalyst comprising palladium, bismuth, and at least one third element X selected from the group consisting of P, S, Sc, V, Ga, Se, Y, Nb, Mo, La, Ce, and Nd, wherein the catalyst further comprises a support.

Abstract: A process comprising for preparing C1 to C4 alkyl(meth)acrylates, such as butyl acrylate, wherein vaporized reactor contents are fed directly to a column, the aqueous reflux ratio to the column is from 4 to 12, and the level of acrylic acid in the primarily organic phase separated from the overhead condensate of the column is less than 2000 ppm.

Abstract: The application concerns a process comprising: (A) contacting a gas comprising oxygen, propane and propylene with at least one catalyst under reaction conditions sufficient to at least partially convert the propylene into a final product comprising acrylic acid; (B) feeding said final product to a separation column, in which the final product is split into a liquid stream, which is rich in acrylic acid, and a gaseous by-product stream comprising propane and propylene in a volume ratio of from 99.9:0.1 to 95:5; (C) contacting the gaseous by-product stream with oxygen in the presence of a catalyst under reaction conditions sufficient to at least partially convert propane to acrylic acid.

Abstract: The application concerns a process comprising: (A) contacting a gas comprising oxygen, propane and propylene with at least one catalyst under reaction conditions sufficient to at least partially convert the propylene into a final product comprising acrylic acid; (B) feeding said final product to a separation column, in which the final product is split into a liquid stream, which is rich in acrylic acid, and a gaseous by-product stream comprising propane and propylene in a volume ratio of from 99.9:0.1 to 95:5; (C) contacting the gaseous by-product stream with oxygen in the presence of a catalyst under reaction conditions sufficient to at least partially convert propane to acrylic acid.

Abstract: A process comprising for preparing C1 to C4 alkyl(meth)acrylates, such as butyl acrylate, wherein vaporized reactor contents are fed directly to a column, the aqueous reflux ratio to the column is from 4 to 12, and the level of acrylic acid in the primarily organic phase separated from the overhead condensate of the column is less than 2000 ppm.