Method for producing cyclosiloxane from silicone waste
The use of aliphatic hydrocarbons and specific catalysts in the depolymerization of silicone waste yields high-purity cyclosiloxanes, addressing inefficiencies in existing methods and reducing environmental harm, enabling the production of high-quality silicones.
JP2026518573APending Publication Date: 2026-06-09EVONIK OPERATIONS GMBH
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- EVONIK OPERATIONS GMBH
- Filing Date
- 2024-04-30
- Publication Date
- 2026-06-09
Smart Images
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Abstract
The present invention relates to a method for producing at least one cyclosiloxane by catalytic depolymerization of silicone waste, comprising or comprising the steps of: (i) dissolving at least a portion of the silicone waste in at least one solvent containing or comprising at least one aliphatic hydrocarbon (K) using at least one depolymerization catalyst (D1); (ii) optionally inactivating at least one depolymerization catalyst (D1) and adding at least one further depolymerization catalyst (D2); and (iii) distilling off at least one cyclosiloxane from the mixture, wherein the method is characterized in that the at least one aliphatic hydrocarbon (K) contains at least 16 carbon atoms.
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