System and method for continuous preparation of supported metal nanomaterials based on coupling of helical flow counter-current microchannel reactor with three-side ultrasonic field

By combining a three-sided ultrasonic field in a helical flow inverter microchannel reactor, the problems of long preparation time and microchannel blockage of supported metal nanomaterials were solved, realizing the continuous preparation of supported metal nanomaterials with small particle size and narrow distribution, enhancing mixing and mass transfer performance, and making it suitable for various metal ions and supports.

CN116571186BActive Publication Date: 2026-07-14ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG UNIV
Filing Date
2023-06-07
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

Existing technologies for preparing supported metal nanomaterials suffer from problems such as long reaction times, unstable batch-to-batch product quality, and easy clogging of microchannel reactors. In particular, there is limited research on heterogeneous synthesis of supported metal nanomaterials in helical flow inverter microchannel reactors.

Method used

By coupling a helical flow inverter microchannel reactor with a three-sided ultrasonic field, ultrasonic transducers are arranged on the three side walls of the reactor to provide a three-sided ultrasonic field. Combined with the helical structure of the helical flow inverter microchannel reactor, the fluid mixing and mass transfer performance is enhanced, and supported metal nanomaterials are prepared.

Benefits of technology

It enables continuous preparation of supported metal nanomaterials with small particle size and narrow distribution, solves the problem of microchannel blockage, improves the simplicity and repeatability of operation, is applicable to different types of metal ions and supports, and is easy to scale up for production.

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Abstract

The application discloses a system and method for continuously preparing supported metal nanomaterials based on a spiral flow reverse microchannel reactor coupled with three-side ultrasonic field. The method adopts the optimal combination of a spiral flow reverse microchannel reactor and ultrasonic to prepare the supported metal nanomaterials, and specifically comprises the following steps: mixing a mixed metal ion precursor solution with a carrier, injecting the mixed solution and a reducing agent into the spiral flow reverse microchannel reactor by using a syringe pump, and synthesizing the supported metal nanomaterials under the action of specific three-side ultrasonic positions. The powder is obtained through centrifugation, filtration and drying. The application realizes the rapid mixing of the reaction fluid, the ultrasonic action on specific 1, 2 and 3 surfaces, the non-uniform distribution of the ultrasonic field, and the supported silver nanoparticles with small particle size and narrow distribution. Meanwhile, the application relieves the plugging problem of the microchannel reactor applied in the preparation of the supported nanocatalytic material, and realizes the continuous long-time production of the product.
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