Patent · US Active

Method of minimizing aldehyde-based impurities in a process stream

US8211275B2 · kind B2 · utility

0Cited by

6References

32Claims

0Family size

Assignee

BASF SE

Inventors

Dominick A. Burlone · Asheville, US
R. Merritt Sink · Lake Jackson, US
JoAnn Lanza · Southfield, US
Karl Gust · Clawson, US

Key dates

Filing date	Feb 15, 2006
Grant date	Jul 3, 2012
Priority date	—
Expiry date	Jan 1, 2029

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C2601/14
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.