Cu-m-al catalyst and method for preparing 1,4-cyclohexanedimethanol with high trans-occupancy ratio by using the same

The co-precipitation method using Cu-M-Al catalyst solves the problems of high pressure, high temperature, and high hydrogen-ester ratio in existing technologies, and realizes the synthesis of CHDM with a high trans isomer ratio under low temperature and low pressure. This reduces production costs and improves catalyst stability, making it suitable for high-value polyester production.

CN122399831APending Publication Date: 2026-07-17DALIAN UNIV OF TECH
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Patent Information

Application Number
CN202610455415.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-08
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing technologies for CHDM synthesis suffer from problems such as high pressure and temperature, high hydrogen-to-ester ratio, and low space velocity, resulting in high energy consumption and increased costs. Furthermore, it is difficult to obtain a high proportion of trans isomers under mild conditions, which limits its application in the production of high-value polyesters.

Method used

A Cu-M-Al catalyst was prepared by co-precipitation, using Mn, Zn, or Mg as promoters and Al2O3 as support. By controlling the precipitation and calcination processes, a high specific surface area and dispersion were achieved to catalyze the hydrogenation reaction of dimethyl 1,4-cyclohexanedicarboxylate under the conditions of low temperature, low pressure, low hydrogen-to-ester ratio, and high space velocity.

Benefits of technology

Achieving high-yield and high-trans-ratio CHDM synthesis under mild conditions reduces equipment investment and operating costs, improves catalyst stability and lifespan, and is suitable for the production of high-value polyesters.

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Abstract

一种Cu‑M‑Al催化剂及其制备高反式占比1,4‑环己烷二甲醇的方法，属于催化加氢技术领域。催化剂Cu‑M‑Al（M=Mn,Zn,Mg）以Cu为活性中心，以Mn、Zn或Mg为助剂，Al2O3为载体，采用共沉淀法制备。通过调控沉淀与焙烧工艺，可获得高比表面积、高分散度的活性结构。在180‑240℃、1‑6 MPa、液时空速0.5‑1.0 h‑1、氢酯摩尔比10‑40的温和条件下，该催化剂可实现DMCD转化率>99%，CHDM选择性>99%，产物反顺比高达4.3，且连续运行100 h活性稳定。本方法工艺简单，能高效制备高反式占比的CHDM，具备良好工业应用前景。
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Citation Information

Patent Citations

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    CN107188782B

  • Method for preparing 1, 4-cyclohexanedimethanol through hydrogenation of dimethyl 1, 4-cyclohexanedicarboxylate

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