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US 9,604,956 B2Granted
Process for the production of trioxane
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 liquid reaction mixture comprising a) formaldehyde source, b) an aprotic compound and c) a catalyst; and ii) converting the formaldehyde source into cyclic acetals.
Claims23
A process for producing a cyclic acetal comprising:
- contacting a formaldehyde source with a liquid medium comprising a sulfur-containing organic compound and a catalyst, the catalyst comprising trifluoromethanesulfonic acid, perchloric acid, methanesulfonic acid, toluenesulfonic acid, sulfuric acid, or a solid acid ion-exchange materiel;
- and
- at least partially converting the formaldehyde source into a cyclic acetal, wherein the cyclic acetal comprises trioxane.
A process for producing cyclic acetal comprising
- i) preparing a liquid reaction mixture comprising
- a) a formaldehyde source,
- b) an aprotic compound comprising a sulfur-containing organic compound and
- c) a catalyst, the catalyst comprising trifluoromethanesulfonic acid, perchloric acid, methanesulfonic acid, toluenesulfonic acid, sulfuric acid, or a solid acid ion-exchangepaterial;
- and
- ii) converting the formaldehyde source into cyclic acetals;
- wherein the cyclic acetals comprise trioxane.
4 more elements
A process for producing a cyclic acetal comprising:
- contacting a formaldehyde source with a liquid medium comprising a sulfur-containing organic compound in the presence of a catalyst, the sulfur-containing organic compound comprising an organic sulfoxide, a sulfone, or mixtures thereof;
- and
- at least partially converting the formaldehyde source into a cyclic acetal, wherein the cyclic acetal comprises trioxane.
Dependencies are inferred from the claim text.