Process of making pseudoionone and hydroxy pseudoionone in aqueous mixtures comprising citral and acetone, comprising adding first and second amounts of hydroxide

US11396487B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Josias Jakobus Nieuwoudt · Ludwigshafen am Rhein, DE
• Bernhard Brunner · Thun, CH
• Sven REINING · Ludwigshafen am Rhein, DE
• Timon Stork · Kuantan, MY
• Bjoern KAIBEL · Ludwigshafen, DE
• Alexander Zipp · Ludwigshafen am Rhein, DE
• Oliver Bey · Niederkirchen, DE

Key dates

• Filing date: Nov 13, 2019
• Grant date: Jul 26, 2022
• Expiry date: Nov 13, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C45/74
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Described is a process of making pseudoionone and hydroxy pseudoionone comprising the steps of (i) preparing a first aqueous mixture comprising first concentrations of acetone, citral and hydroxide, (ii) producing a second aqueous mixture by allowing to react for a reaction time the components of the first aqueous mixture and (iii) producing a third aqueous mixture by adding to the second aqueous mixture a second amount of hydroxide so that an additional amount of pseudoionone is formed in the third aqueous mixture. The invention further suggests an apparatus for making pseudoionone and hydroxy pseudoionone as well as to a respective process and use of said apparatus in making pseudoionone and hydroxy pseudoionone.