Method of minimizing aldehyde based impurities in a process stream
AssigneeBASF SE
InventorsDominick Burlone, R. Sink, Joann Lanza, Karl Gust
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Abstract
Oxidation of an alkane to an alkanone in a process stream forms aldehyde-based impurities. A method of minimizing the aldehyde-based impurities introduces an amine into the process stream to minimize the aldehyde-based impurities. The amine interacts with the alkanone and the aldehyde-based impurities thereby forming heavy products. The method separates the heavy products from the alkanones to reduce a level of the aldehyde-based impurities. The process stream preferably includes cyclohexyl ketone as the alkanone and n-hexanal as the aldehyde-based impurity. The method is typically involved in synthesis of a caprolactam.
Claims42
A method of minimizing aldehyde-based impurities in a process stream comprising an alkanone and the aldehyde-based impurities, said method comprising the steps of:
- introducing an amine into the process stream to form a heavy product;
- and
- separating the alkanone from the heavy product.
A method of minimizing aldehyde-based impurities in a process stream comprising cyclohexyl ketone and n-hexanal, said method comprising the steps of:
- introducing an amine into the process stream to form a heavy product;
- and
- distilling the cyclohexyl ketone from the heavy product.
A method of minimizing aldehyde-based impurities in a process stream used in synthesis of caprolactam, the process stream comprising cyclohexyl ketone and n-hexanal, said method comprising the steps of:
- introducing an amine into the process stream to form a heavy product;
- and
- distilling the cyclohexyl ketone from the heavy product.
Dependencies are inferred from the claim text.