Upgrading bio-based acetone to diacetone alcohol by aldol reaction using Amberlyst A26-OH as catalyst

M Eisenacher,W F Hoelderich,M Venschott,W Bonrath,D Dylong,J Schütz

doi:10.1007/s11144-022-02168-z

Abstract

The aldol reaction of bio acetone in presence of a strongly basic ion exchange resin was carried out with and without the addition of water in a temperature range between − 30 °C and 45 °C. The conversion, selectivity and service time of the ion exchange resins were investigated in a stirred batch reactor and a continuous fixed bed reactor. For the batch experiments, both conversion and selectivity increased with decreasing temperature. Furthermore, the addition of water to the reaction medium has a positive effect on selectivity and catalyst service time of the resins. For the continuous flow experiments carried out in a fixed bed reactor, the selectivity towards diacetone alcohol is higher than in a batch reactor. This high selectivity is favored by a short contact time which inhibits as expected most of the consecutive reactions.

Highlights

In order to shift our current society and industry to more environmentally friendly alternatives, scientists from different disciplines have been looking for possibilities to replace petrochemical processes by sustainable biorefinery approaches to produce chemicals such as n-butanol
The formation of acetone is undelightful under economic reasons, since acetone is formed in large amounts as byproduct in the phenol process resulting in a cheap price [7]
The possible conversion of acetone to diacetone alcohol (DAA) is a good criterion to estimate the conversion in a fixed bed reactor

Summary

Introduction

In order to shift our current society and industry to more environmentally friendly alternatives, scientists from different disciplines have been looking for possibilities to replace petrochemical processes by sustainable biorefinery approaches to produce chemicals such as n-butanol. Keywords Aldol reaction · Basic ion exchange resin · Diacetone alcohol · Water addition Processes to manufacture diacetone alcohol start with the aldol reaction of two equivalents acetone in presence of a basic catalyst [14].

Results

Conclusion