Patent ID: 7717977

Claim:
A producing method for continuously producing metal microparticles comprising forming the metal microparticles through an early reaction and introducing dissimilar metal atoms into crystal lattices in the metal microparticles using a unit, wherein the unit comprises: a first mixing unit for continuously supplying and mixing at least a first solution and a second solution for conducting the early reaction and forming a reaction liquid containing metal microparticles; a second mixing unit for continuously supplying a third solution to the reaction liquid and for mixing the third solution and the reaction liquid, to introduce dissimilar metal atoms into the crystal lattices of the metal microparticles and to form a mixed solution; a pipe connecting the first mixing unit and the second mixing unit; and a gas-liquid separation unit that is installed in a midway position of the pipe, wherein the pipe is made so as to have enough length to finish the early reaction, continuously passes the reaction liquid to the second mixing unit from the first mixing unit, and continuously removes a byproduct gas generated as the early reaction proceeds.