A process for the production of 3-hydroxypropionaldehyde by reactive extraction

The preparation of 3-hydroxypropanal using an acidic solution-modified molecular sieve catalyst and a polar solvent via reaction extraction solves the problems of low raw material conversion rate and selectivity, as well as high separation energy consumption, and achieves efficient production of 3-hydroxypropanal.

CN119059894BActive Publication Date: 2026-06-12CHINA TIANCHEN ENGINEERING CORPORATION LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA TIANCHEN ENGINEERING CORPORATION LTD
Filing Date
2024-07-17
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

Existing methods for preparing 3-hydroxypropanal suffer from low raw material conversion rate and product selectivity, as well as high energy consumption in post-processing separation.

Method used

A reaction extraction method was adopted, in which the catalyst was loaded into the reactor, and the reactants and extractant were pumped into the reactor countercurrently to carry out the hydration reaction. Acid-modified molecular sieves were used as catalysts, and polar solvents that are not completely miscible with water were selected as extractants. The reaction extraction was carried out in a fixed-bed reactor to separate the hydration product 3-hydroxypropionaldehyde.

Benefits of technology

It improved the overall yield of 3-hydroxypropionaldehyde, reduced water content, reduced the difficulty of subsequent separation, significantly reduced energy consumption, and improved the conversion rate and selectivity of acrolein.

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Abstract

The application provides a method for preparing 3-hydroxypropionaldehyde by reaction extraction, comprising the following steps: loading a catalyst into a reactor, simultaneously pumping a reaction raw material and an extractant into the reactor in countercurrent, and performing a hydration reaction; the reaction raw material comprises an aqueous propylene acid solution. The method for preparing 3-hydroxypropionaldehyde by reaction extraction separates the hydration product 3-hydroxypropionaldehyde in time during the hydration reaction, moves the hydration reaction to a forward reaction direction, increases the overall yield of 3-hydroxypropionaldehyde, reduces the water content in the product, and further reduces the difficulty of subsequent separation, and compared with direct water evaporation, the energy consumption is significantly reduced. Meanwhile, maintaining a high water / aldehyde ratio can accelerate the hydration reaction rate, effectively reduces the generation of by-products, and further reduces the production cost.
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Citation Information

Patent Citations

  • process for the production of aldols.

    CH236387A

  • Method for synthesizing high-concentration 3-hydroxypropionaldehyde through continuous catalytic reaction

    CN113105315A

  • Method for preparing 3-hydroxypropionaldehyde through acrolein hydration

    CN115626869A