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US 2014/0235875 A1Published application
Method for producing cyclic carbonates
OwnerRajni Hatti-Kaul, Sang-Hyun Pyoinventors
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Abstract
Linear or cyclic carbonates as potential monomers for isocyanate-free polyurethanes and polycarbonates were prepared from polyols and dialkyl carbonates or diphenyl carbonates. This invention was developed to produce linear or cyclic carbonates with or without using catalysts. Polyol compounds were reacted with carbonates such as dimethyl carbonate and diethyl carbonate to produce the corresponding linear and/or cyclic carbonate.
Claims15
A method of producing linear or cyclic carbonates comprising the steps of:
- a. providing a polyol and a dialkyl carbonate or a diphenyl carbonate
- b. forming a mixture of a polyol and a dialkyl carbonate or a diphenyl carbonate;
- c. optionally adding a solvent;
- d. adding an adsorbent;
- and
- e. heating the mixture to obtain linear or cyclic carbonates.
3 more elements
Dependencies are inferred from the claim text.