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US 9,469,624 B2Granted
Integrated process for producing cyclic acetals and oxymethylene polymers
AssigneeTicona LLC
InventorsMichael Haubs, Michael Hoffmockel, Klaus Kurz, Jurgen Lingnau, Damian Feord
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Abstract
A process for producing cyclic acetals is described. A formaldehyde source is contacted with an aprotic compound in the presence of a catalyst to produce the cyclic acetals. The aprotic compound can increase conversion rates and/or efficiency. In one embodiment, the formaldehyde source is obtained from methanol. In particular, methanol can be converted into formaldehyde which is then converted into a cyclic acetal. In one embodiment, the cyclic acetal can then be used to produce oxymethylene polymers.
Claims20
A process for producing a cyclic acetal comprising:
- converting methanol to a formaldehyde;
- contacting the formaldehyde with a catalyst in the presence of an aprotic compound, the aprotic compound comprising a sulfur containing organic compound having a boiling point greater than 120° C. determined at 1 bar;
- and
- at least partly converting the formaldehyde to a cyclic acetal.
1 more element
Dependencies are inferred from the claim text.