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US 2016/0280882 A1Published application
Process For Recycling Polyacetals
AssigneeTicona LLC
InventorsMichael Haubs, Jürgen Lingnau, Klaus Kurz
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Abstract
A process for recycling polyoxymethylene polymers is disclosed. A polyoxymethylene polymer is at least partially dissolved in an aprotic compound. The resulting solution or suspension (liquid mixture) is then contacted with a catalyst which causes the polyoxymethylene polymer to be converted into a cyclic acetal. The cyclic acetal can be separated, collected and used in other processes. In one embodiment, the cyclic acetal may be used to produce a polyoxymethylene polymer.
Claims16
-20. (canceled)
A process for the recycling of oxymethylene homo- or copolymers comprising the steps:
- a) at least partly dissolving an oxymethylene homo- or copolymer in an aprotic compound;
- b) converting the at least partly dissolved oxymethylene homo- or copolymer in the presence of a catalyst to cyclic acetals;
- and
- c) converting the cyclic acetals obtained in step b) optionally together with comonomer(s) to oxymethylene polymers.
1 more element
Dependencies are inferred from the claim text.