Process and catalyst for oxidative esterification with long-life catalyst
OwnerKirk W. Limbach, Christopher D. Frick +2inventors
InventorsKirk W. Limbach, Christopher D. Frick, Wen Sheng Lee, Victor J. Sussman
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Abstract
A catalyst comprises gold particles and titanium-containing particles. The catalyst comprises gold particles that are within at least 15 nm of at least one titanium-containing particle. The gold particles have an average diameter of less than 15 nm and a standard deviation of +/−5 nm. A method for preparing methyl methacrylate from methacrolein and methanol using the catalyst is also disclosed.
Claims9
A catalyst comprising gold particles and titanium-containing particles, wherein the catalyst comprises gold particles within at least 15 nm of at least one titanium-containing particle, and wherein the gold particles have an average diameter of less than 15 nm and a standard deviation of +/−5 nm.
The catalyst of any one of the preceding claims, wherein the titanium-containing particles comprise a titanium oxide.
The catalyst of any one of the preceding claims, wherein the gold particles are evenly distributed among the titanium-containing particles.
The catalyst of any one of the preceding claims, wherein the gold particles have an average diameter of less than 10 nm and a standard deviation of +/−2.5 nm.
The catalyst of any one of the preceding claims, wherein at least 0.1% by weight of the total weight of the gold particles are exposed on a surface of the catalyst.
A method for preparing methyl methacrylate from methacrolein and methanol;
- said method comprising contacting in a reactor a mixture comprising methacrolein, methanol and oxygen in the presence of a catalyst according to any one of the preceding claims.
Dependencies are inferred from the claim text.