Title:
プソイドイオノンおよびイオノンの連続的製造方法
Document Type and Number:
Japanese Patent JP4727228
Kind Code:
B2
Abstract:
The invention relates to a continuous process for producing pseudoionones of general formulas (I) and (I') as well as isomers thereof, whereby: R1 represents CH3 or (a); R2 and R3 represent hydrogen, CH3 or C2H5, and; R4 and R5 represent hydrogen or CH3. These pseudoionones are produced by reacting an aldehyde of formula (II) with an excess of a ketone of general formula (III), whereby R1, R2 and R3 have the aforementioned meanings, in the presence of water and alkali hydroxide at an increased temperature and in a homogeneous solution. The inventive process is characterized in that: a) the intermixing of the homogeneous solution consisting of aldehyde, ketone and aqueous alkali lye occurs at a temperature ranging from 10 to 120° C.; b) the undissolved water and alkali hydroxide contained in the reaction mixture are subsequently separated out; c) while avoiding back mixing, the homogeneous reaction mixture is then guided through a reactor, which permits a residence time ranging from 2 to 300 minutes, at a temperature that is 10 to 120° C. higher than the boiling point of the lowest-boiling component and under a vapor pressure p ranging from 106 to 107 Pa; d) the reaction mixture is cooled by expansion; e) ketone is removed from the reaction mixture using vapor flowing in the opposite direction and; f) the raw product is dried and rid from excessive aldehyde and secondary components via a rectification column.
Inventors:
Dobler, walter
Bar, Nicolaus
Brewer, Claus
Kindler, Alois
Bar, Nicolaus
Brewer, Claus
Kindler, Alois
Application Number:
JP2004548796A
Publication Date:
July 20, 2011
Filing Date:
October 28, 2003
Export Citation:
Assignee:
BASF SE
International Classes:
C07C45/75; C07C45/54; C07C45/74; C07C49/203; C07C403/16
Domestic Patent References:
| JP2000510130A | ||||
| JP57179132A |
Attorney, Agent or Firm:
Yusuke Hiraki
Ishii Teiji
Satoshi Fujita
Ai Fujii
Ishii Teiji
Satoshi Fujita
Ai Fujii