The invention relates to a method for production of oxymethylene ether of the general formula CH.sub.3O—(CH.sub.2O).sub.m—CH.sub.3 in a liquid phase process, wherein 1≤m≤10. In a catalytic reaction, molecular oxygen or an oxygen-containing oxidant and methanol, formaldehyde, and/or methyl formate are used as reactants in a solution and are converted by means of a vanadium-oxygen compound or a salt thereof as catalyst in the solution which vanadium-oxygen compound contains vanadium in the oxidation stage +IV or +V. The catalyst reduced during the catalytic reaction is restored to its starting state by oxidation by means of the molecular oxygen or the oxygen-containing oxidant.

The invention relates to a method for production of oxymethylene ether of the general formula CH.sub.3O—(CH.sub.2O).sub.m—CH.sub.3 in a liquid phase process, wherein 1≤m≤10. In a catalytic reaction, molecular oxygen or an oxygen-containing oxidant and methanol, formaldehyde, and/or methyl formate are used as reactants in a solution and are converted by means of a vanadium-oxygen compound or a salt thereof as catalyst in the solution which vanadium-oxygen compound contains vanadium in the oxidation stage +IV or +V. The catalyst reduced during the catalytic reaction is restored to its starting state by oxidation by means of the molecular oxygen or the oxygen-containing oxidant.

The invention relates to a method for production of oxymethylene ether of the general formula CH.sub.3O—(CH.sub.2O).sub.m—CH.sub.3 in a liquid phase process, wherein 1≤m≤10. In a catalytic reaction, molecular oxygen or an oxygen-containing oxidant and methanol, formaldehyde, and/or methyl formate are used as reactants in a solution and are converted by means of a vanadium-oxygen compound or a salt thereof as catalyst in the solution which vanadium-oxygen compound contains vanadium in the oxidation stage +IV or +V. The catalyst reduced during the catalytic reaction is restored to its starting state by oxidation by means of the molecular oxygen or the oxygen-containing oxidant.

The present invention relates to a method for producing polyoxymethylene dimethyl ether by introducing a formaldehyde source and at least one compound of the formula (I)

H.sub.3C—O—R  (I) where R is H or —(CH.sub.2O).sub.x—CH.sub.3 with x being 0 or 1
as reactants into a reactive distillation unit and reacting them to give polyoxymethylene dimethyl ether, wherein the method produces polyoxymethylene dimethyl ether exclusively in the reactive distillation unit.

The present invention relates to a method for producing polyoxymethylene dimethyl ether by introducing a formaldehyde source and at least one compound of the formula (I)

H.sub.3C—O—R  (I) where R is H or —(CH.sub.2O).sub.x—CH.sub.3 with x being 0 or 1
as reactants into a reactive distillation unit and reacting them to give polyoxymethylene dimethyl ether, wherein the method produces polyoxymethylene dimethyl ether exclusively in the reactive distillation unit.

The present invention relates to a method for producing polyoxymethylene dimethyl ether by introducing a formaldehyde source and at least one compound of the formula (I)

H.sub.3C—O—R  (I) where R is H or —(CH.sub.2O).sub.x—CH.sub.3 with x being 0 or 1
as reactants into a reactive distillation unit and reacting them to give polyoxymethylene dimethyl ether, wherein the method produces polyoxymethylene dimethyl ether exclusively in the reactive distillation unit.

Disclosed herein are methods for synthesizing fatty olefin metathesis products of high Z-isomeric purity from olefin feedstocks of low Z-isomeric purity. The methods include contacting a contacting an olefin metathesis reaction partner, such as acylated alkenol or an alkenal acetal, with an internal olefin in the presence of a Z-selective metathesis catalyst to form the fatty olefin metathesis product. In various embodiments, the fatty olefin metathesis products are insect pheromones. Pheromone compositions and methods of using them are also described.

Disclosed herein are methods for synthesizing fatty olefin metathesis products of high Z-isomeric purity from olefin feedstocks of low Z-isomeric purity. The methods include contacting a contacting an olefin metathesis reaction partner, such as acylated alkenol or an alkenal acetal, with an internal olefin in the presence of a Z-selective metathesis catalyst to form the fatty olefin metathesis product. In various embodiments, the fatty olefin metathesis products are insect pheromones. Pheromone compositions and methods of using them are also described.

The present invention relates to a process for preparing ethers, particularly unsymmetrical ethers, and preferably ethers suitable for use as base stocks for lubricant compositions. In particular, the process involves the reaction of an α,β-unsaturated aldehyde with a trihydrocarbyl orthoester to form an α,β-unsaturated acetal and conversion of the α,β-unsaturated acetal to an ether through hydrogenation and hydrogenolysis.

The present invention relates to a process for preparing ethers, particularly unsymmetrical ethers, and preferably ethers suitable for use as base stocks for lubricant compositions. In particular, the process involves the reaction of an α,β-unsaturated aldehyde with a trihydrocarbyl orthoester to form an α,β-unsaturated acetal and conversion of the α,β-unsaturated acetal to an ether through hydrogenation and hydrogenolysis.