The invention relates to a method for catalytically producing an alkyl formate, wherein at least one alpha-hydroxy aldehyde, at least one alpha-hydroxy carboxylic acid, at least one carbohydrate, and/or at least one glycoside is reacted by means of a vanadium-oxygen compound, which contains vanadium in the oxidation stage +IV or +V, or a salt thereof as a catalyst in the solution, wherein the solution contains an alkanol, and the alkyl formate produced as a reaction product is separated from at least one other resulting reaction product. The catalyst which is reduced during the catalytic reaction is restored to its starting state in an oxidation process.

The invention relates to a method for catalytically producing an alkyl formate, wherein at least one alpha-hydroxy aldehyde, at least one alpha-hydroxy carboxylic acid, at least one carbohydrate, and/or at least one glycoside is reacted by means of a vanadium-oxygen compound, which contains vanadium in the oxidation stage +IV or +V, or a salt thereof as a catalyst in the solution, wherein the solution contains an alkanol, and the alkyl formate produced as a reaction product is separated from at least one other resulting reaction product. The catalyst which is reduced during the catalytic reaction is restored to its starting state in an oxidation process.

A process can be used for preparing methyl methacrylate (MMA), by direct oxidative esterification of methacrolein. The MMA and polymers produced therefrom feature a very low yellowness index. A workup of the reactor output from the oxidative esterification of methacrolein allows for particularly discolouring by-products to be removed or degraded without significant MMA losses.

A process can be used for preparing methyl methacrylate (MMA), by direct oxidative esterification of methacrolein. The MMA and polymers produced therefrom feature a very low yellowness index. A workup of the reactor output from the oxidative esterification of methacrolein allows for particularly discolouring by-products to be removed or degraded without significant MMA losses.

A catalyst for production of carboxylic acid ester, containing: catalyst metal particles; and a support supporting the catalyst metal particles, wherein the catalyst has a hollow particle ratio of 40% or less.

A catalyst for production of carboxylic acid ester, containing: catalyst metal particles; and a support supporting the catalyst metal particles, wherein the catalyst has a hollow particle ratio of 40% or less.

A regioselective N-Heterocyclic Carbene (NHC) catalyzed one step process for high yield synthesis of α-acyloxy carbonyl compounds is disclosed. ##STR00001##

A regioselective N-Heterocyclic Carbene (NHC) catalyzed one step process for high yield synthesis of α-acyloxy carbonyl compounds is disclosed. ##STR00001##

A regioselective N-Heterocyclic Carbene (NHC) catalyzed one step process for high yield synthesis of α-acyloxy carbonyl compounds is disclosed. ##STR00001##

A process can be used for producing hydroxyalkyl (meth)acrylate esters, in particular hydroxyethyl methacrylate (HEMA). The process involves a first reaction of (meth)acrolein with at least one polyhydric alcohol, in particular ethylene glycol, in the presence of a first catalyst C1, wherein a first reaction product containing a cyclic acetal is obtained. The process then involves a second reaction of the first reaction product with oxygen in the presence of a second catalyst C2, wherein a second reaction product containing at least one hydroxyalkyl (meth)acrylate ester is obtained. After the first reaction, water and optionally further components, in particular (meth)acrolein and/or the polyhydric alcohol, e.g. ethylene glycol, are at least partially removed from the first reaction product.