Carbon nitride-anchored ru-based catalysts and methods of making and use in reductive amination of alcohol compounds to produce amine compounds

By constructing ruthenium-ruthenium cooperative sites using a ruthenium-nitride anchored Ru-based catalyst, the problem of efficient conversion of various types of alcohols under the coexistence of hydrogen and ammonia was solved, realizing efficient, stable, and selective amination reactions with high product yields. This method is suitable for the green and large-scale application of various types of alcohols.

CN122141713APending Publication Date: 2026-06-05TIANJIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TIANJIN UNIV
Filing Date
2026-01-12
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing technologies struggle to efficiently and selectively convert various types of alcohols, such as C9-C14 long-chain diols, phenylcyclic alcohols, and furancyclic alcohols, into corresponding amine compounds under conditions where hydrogen and ammonia coexist. The catalysts are prone to deactivation, have poor selectivity, and exhibit numerous side reactions.

Method used

By employing a Ru-based catalyst anchored with carbon nitride, the electronic structure and surface adsorption behavior of ruthenium are modulated by constructing ruthenium-ruthenium cooperative sites and introducing nitrogen coordination structures, thereby promoting the reductive amination reaction of alcohols.

Benefits of technology

It achieves efficient, stable, and selective reductive amination of alcohols with high product yield, good catalyst stability, and few side reactions, making it suitable for the green and large-scale application of various types of alcohols.

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Abstract

This invention relates to a carbon nitride-anchored Ru-based catalyst, its preparation method, and its application in the reductive amination of alcohols to prepare amines. The catalyst is based on Ru... n -M n -N x -C indicates that M is a second metal including Pd, Pt, Cu, and Co, and Ru in the catalyst is represented by Ru. 0 With Ru δ+ The coexistence of two valence states, Ru 0 They account for 70%–80% of all Ru species, of which Ru... δ+ The proportion of ruthenium nanoclusters is 20%–30%, and M is the second metal, accounting for 0.01–10 wt% of the total catalyst mass. This invention introduces a nitrogen coordination structure between ruthenium nanoclusters and a carbon support, effectively inhibiting ammonia poisoning and carbon deposition deactivation while maintaining the ruthenium-ruthenium synergistic active sites; it achieves efficient conversion under mild conditions, with significantly improved product yield and selectivity; it is applicable to various types of alcohol substrates, especially suitable for the green synthesis of long-chain aliphatic diamines and functional amine compounds, and has good prospects for industrial application.
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