Catalysis of Dehydration & Condensation Reactions by Ionic Resins

Alfa Chemistry provides ionic resin catalysts for dehydration and condensation reactions. Our catalysts have higher yield and selectivity and are most suitable for such reactions. Just speak your thoughts, we will help you customize the resin catalyst that suits your needs. You can also completely deliver your synthesis project to us.

Introduction

Compared with the traditional Lewis acid catalyst, the ionic resin solid acid catalyst has less corrosion to equipment, easy product separation, catalyst recovery and less environmental pollution. In addition, the ionic resin catalyst also has certain chemical and thermal stability. Resin catalysts can be used in various dehydration condensation reactions, including catalytic dehydration to synthesize oxygen-containing heterocyclic compounds, and can also catalyze the dehydration condensation of ethylene glycol and monohydric alcohols (such as methanol) to produce ethyl acetate. Ethylene glycol dimethyl ether. The process can also be used to catalyze the dimerization and condensation of ethylene glycol or polyethylene glycol ether to produce 1,4-dioxane and 1,4-butanediol to produce tetrahydrofuran. Resin-catalyzed reactions can be roughly divided into two categories. One type is the existence of a large amount of water in the reaction itself, which can make the resin solute and form protons with active catalytic substances. The other type is a reaction where the proportion of water in the reaction is low, and the reaction is catalyzed by undissociated sulfonic acid groups.

The use of ion exchange resin as a solid acid catalyst can be widely used in dehydration and condensation reaction processes. The use of heterogeneous acid-base catalysts can catalyze the formation of anhydroglucose and 5-hydroxymethyl furfural from glucose. In the presence of alkali, glucose can be converted to fructose through aldose-ketose isomerization. The reaction process is shown in Fig. 1.

Fig.1 Glucose forms the reaction pathway of anhydroglucose and 5-hydroxymethyl furfural. (Ohara M, et al.,2010)

In industry, bisphenol A is made by the condensation of phenol and acetone in an acidic medium. The use of ion exchange resin to catalyze the production of bisphenol A can avoid the strong corrosion of equipment and environmental pollution caused by the use of sulfuric acid and hydrogen chloride in conventional processes.(YaNan Li, et al., 2015)

As an expert in the field of ionic resin and organic synthesis, Alfa Chemistry focuses on the application of ionic resin catalysts in organic synthesis. We provide various types of ionic resin catalysts, which can be used in a variety of organic reactions. Our goal is to help you speed up the synthesis process and provide customized resins. Our customers can directly contact our experts and provide timely feedback on any online inquiries. If you are interested in our services, please contact us.

References

1. Ohara M, et al. Syntheses of 5-hydroxymethylfurfural and levoglucosan by selective dehydration of glucose using solid acid and base catalysts[J]. Applied Catalysis A General, 2010.
2. YaNan Li, et al. Progress on Application of Ion Exchange Resins in Catalytic Organic Reaction[J]. CHINESE JOURNAL OF APPLIED CHEMISTRY, 2015.