Patent · US Expired

Two-phase ammoximation

US6664423B2 · kind B2 · utility

7Cited by

3References

20Claims

0Family size

Assignee

Degussa AG · DE

Inventors

Juergen Herwig
Stefan Leininger · Langenselbold, DE
Georg Oenbrink · Schneverdingen, DE
Thomas Schiffer · Haltern, DE

Key dates

Filing date	Nov 14, 2002
Grant date	Dec 16, 2003
Priority date	—
Expiry date	Nov 14, 2022

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C2601/20
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Oximes are prepared from ketones or aldehydes, hydrogen peroxide and ammonia. The reaction is carried out in a system of one aqueous phase and one phase of hydrocarbons inert under the reaction conditions in the presence of at least one interphase contactor and a catalyst system which consists of at least two components. A first component of the catalyst system is present in heterogeneous form and is based on titanium, silicon and oxygen and a second component is a homogeneously dissolved or suspended ammonium salt.

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