Gas and liquid phase catalytic Beckmann rearrangement of oximes to produce lactams
AssigneeHoneywell International Inc.
InventorsAlan B. Levy, Robert Raja, Matthew E. Potter
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Abstract
Methods for producing lactams from oximes by performing a Beckmann rearrangement using a silicoaluminophosphate catalyst are provided. These catalysts may be used in gas phase or liquid phase reactions to convert oximes into lactams. High conversion of oxime and high selectivity for the desired lactams are produced using the disclosed methods, including high conversion and selectivity for ε-caprolactam produced from cyclohexanone oxime and high conversion and selectivity for ω-laurolactam produced from cyclododecanone oxime.
Claims22
A method of performing a Beckmann rearrangement reaction comprising the step of:
- reacting an oxime in a liquid phase in the presence of a catalyst to produce a lactam, said catalyst comprising a silicon-containing aluminophosphate with the IZA framework code FAU;
- wherein the oxime is selected from cyclohexanone oxime and cyclododecanone oxime and the lactam is selected from ε-caprolactam and ω-laurolactam.
A method of performing a Beckmann rearrangement reaction comprising the step of:
- reacting an oxime in a gas phase in the presence of a catalyst to produce a lactam, said catalyst comprising a silicon-containing aluminophosphates with the IZA framework code FAU;
- wherein said reacting step further comprises the combination of conversion of oxime and selectivity of the lactam is selected from the group consisting of:
- the conversion of the oxime is at least 50% and the selectivity of the lactam is at least 90%;
- and
- the conversion of the oxime is at least 90% and the selectivity of the lactam is at least 80%;
- wherein the oxime is selected from cyclohexanone oxime and cyclododecanone oxime and the lactam is selected from ε-caprolactam and ω-laurolactam.
Dependencies are inferred from the claim text.