Sinopec has been granted an invention patent: “A catalyst for the synthesis of N,N-bis(3-aminopropyl)methanamine and its preparation method and application””

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According to data from the Tianyancha app, Sinopec (600028) has newly obtained an invention patent grant. The title of the patent is “A catalyst for synthesizing N,N-bis(3-aminopropyl)methanamine, as well as its preparation method and applications.” The patent application number is CN202311262299.3, and the grant date is October 3, 2025. Patent abstract: The present invention relates to a catalyst for synthesizing N,N-bis(3-aminopropyl)methanamine, as well as its preparation method and applications. Catalyst preparation steps: Mix the first and second water-soluble metal salts with water to obtain a mixed bimetallic salt solution ； A carbon-based substrate was dispersed in water, along with an equal amount of nano TiO2 as a catalyst load; ultrasonic stirring was used to ensure complete dispersion, after which an appropriate amount of the mixed bimetallic salt solution was added ； The aforementioned mixed bimetallic salt solution was placed under a xenon light source and subjected to irradiation while being stirred for reaction; the resulting solution after irradiation was frozen into a solid, and finally this solid was subjected to vacuum freeze-drying to obtain the catalyst used for synthesizing N,N-bis(3-aminopropyl)methanamine. The catalyst obtained by the present invention simplifies the facilities and operations in the synthesis process of N,N-bis(3-aminopropyl)methanamine, and features high activity and good selectivity. The preparation method of this catalyst features wide availability of raw materials, simple operation, and low cost.