JP2017226916A5 - - Google Patents

Claims (11)

  Step of synthesizing metal nanoparticles by circulating a reaction liquid in which a first liquid containing at least a raw material salt of metal nanoparticles and a second liquid containing a reducing agent of the raw material salt are circulated in a reaction tube In the method for producing metal nanoparticles, the production method includes a step of preparing at least one of a reaction state determination means and a classification means in at least a part of the synthesis step of the metal nanoparticles, and at least one reduction In the process, a method for producing metal nanoparticles using a mixed phase flow of gas and liquid as the reaction liquid.   At least a part of the reaction tube disposed at least in the microwave irradiation field includes a first liquid containing at least a raw material salt of metal fine particles and / or a second liquid containing at least a reducing agent of the raw material salt and a gas. Circulating the reaction solution as a mixed multiphase flow;
Irradiating the reaction liquid with microwaves and heating the reaction liquid;
Passing at least one of the first liquid, the second liquid, and the reaction liquid through at least a part of the reaction tube to control the reduction action of the metal fine particles, and synthesizing the metal fine particles;
In necessary places, particle reaction status judgment means, particle diameter observation means, particle size distribution observation means, component observation means, particle size selection and classification means such as ultrafiltration, classification means, flow dividing means, heating and cooling, etc. Providing at least one of temperature control means and the like,
Providing means to select and control multiple processes
The manufacturing method of the metal microparticle which has this.   The method for producing fine metal particles according to claim 1 or 2, wherein the gas is an inert gas.   The method for producing fine metal particles according to claim 1 or 2, wherein the gas is at least one of hydrogen gas and another reactive gas.   The method for producing metal fine particles according to any one of claims 1 to 4, wherein the microwave irradiation field is at one or more places.   The method for producing metal fine particles according to any one of claims 1 to 5, wherein the microwave irradiation received by the reaction liquid is performed twice or more.   The method for producing metal fine particles according to any one of claims 1 to 6, wherein the microwave frequency of microwave irradiation received by the reaction liquid is two or more.   The method for producing metal fine particles according to any one of claims 1 to 7, wherein the microwave irradiation time received by the reaction liquid is two or more.   The method for producing fine metal particles according to any one of claims 1 to 8, wherein the liquid feed rate of the reaction liquid in the microwave irradiation field received by the reaction liquid in the microwave irradiation step is two or more. Method.   The method for producing metal fine particles according to any one of claims 1 to 9, wherein the inner diameter of the reaction tube in the microwave irradiation field received by the reaction liquid is two or more.   The method for producing fine metal particles according to any one of claims 1 to 10, wherein a part of the flow path of at least one reaction tube in the microwave irradiation field received by the reaction liquid is two or more. Method.