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US 9,574,061 B2Granted
Process for producing a cyclic acetal
AssigneeCelanese Sales Germany GmbH
InventorsMichael Haubs, Klaus Kurz, Jurgen Lingnau
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Abstract
The present invention relates to a process for producing cyclic acetal comprising i) preparing a reaction mixture comprising a) a formaldehyde source in a liquid medium and b) a catalyst; ii) converting the formaldehyde source into cyclic acetals, wherein the final conversion of said formaldehyde source to said cyclic acetal is greater than 10% on basis of the initial formaldehyde source.
Claims22
A process for producing a cyclic acetal comprising:
- contacting gaseous formaldehyde with a liquid medium comprising a liquid aprotic compound, wherein the liquid aprotic compound is selected from the group consisting of organic sulfoxides, organic sulfones, organic sulfonate esters, and mixtures thereof, in the presence of a catalyst;
- and
- at least partially converting the gaseous formaldehyde into a cyclic acetal comprising trioxane.
A process for producing cyclic acetal comprising
- i) preparing a reaction mixture comprising
- a) formaldehyde in a liquid medium and
- b) a catalyst;
- that is heterogeneous with the liquid medium
- ii) converting the formaldehyde into trioxane wherein the final conversion of the formaldehyde to the trioxane is greater than 10% on the basis of the formaldehyde.
2 more elements
Dependencies are inferred from the claim text.