Catalyst and method for preparing hydroxyaldehyde by olefine aldehyde hydration

Abstract

The invention provides a catalyst for preparing hydroxyaldehyde by olefine aldehyde hydration and a method thereof, the catalyst adopts a multi-amino acid resin catalyst, and the multi-amino acid resin comprises a polystyrene-divinyl body and a functional group loaded on the surface of the polystyrene-divinyl body; the functional group simultaneously contains an alkaline amino functional group and an acidic functional group, the alkaline amino functional group and the acidic functional group are synergistically catalyzed, the conversion rate of olefine aldehyde can be more than or equal to 50% and the selectivity of the hydroxy aldehyde can be more than or equal to 95% when the functional group is applied to preparation of the hydroxy aldehyde from the olefine aldehyde, the phenomena of catalyst pulverization and the like can be avoided, and industrial implementation is more facilitated.

Description

technical field [0001] The invention relates to the technical field of petrochemical industry, in particular to a catalyst and a method for preparing hydroxyaldehydes by hydration of alkenals. Background technique [0002] 1,3-propanediol (1,3-PDO) is an important organic chemical raw material, mainly used in the production of polytrimethylene terephthalate (PTT) fiber, PTT is a polyester product with excellent performance, integrated The softness and color fastness of nylon, the loft of acrylic, the stain resistance of polyester, and high elasticity. [0003] Acrolein (ACR) is hydrated to produce 3-hydroxypropionaldehyde (3-HPA), and then hydrogenated to produce 1,3-propanediol, which is one of the important methods for synthesizing 1,3-propanediol. However, both acrolein and 3-hydroxypropanal are unstable, and side reactions such as self-polymerization and dimerization of acrolein and 3-hydroxypropionaldehyde are prone to occur, and the side reactions increase rapidly wit...

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Problems solved by technology

[0004] In 2014, Tang Yong reported that using D751 chelating resin as a catalyst, the total liquid space velocity was 1.0h -1 , the temperature is 40-70°C, the conversion rate of acrolein is 50%, the selectivity of 3-hydroxypropanal is 89%, the catalyst can run for 2000h, the reaction temperature rises above 65°C, the conversion rate and selectivity decrease, and the catalyst needs to be regenerated or replaced , so frequent regeneration or replacement of the catalyst is not conducive to industrial implementation (see "New Technology Development and Research on the Synthesis of 1,3-Propanediol from Acrolein Hydration and Hydrogenation", Tang Yong, East China University of Science and Technology)

[0009] In summary, it can be seen that the existing process for preparing 3-hydroxypropanal by hydration of acrolein has problems such as high reaction temperature, additional additives, and short catalyst life, which are not conducive to realizing industrialization

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