Demetallization agent, preparation method and application method thereof, and application of demetallization auxiliary agent

The invention discloses a demetalization agent, a preparation method and an application method thereof and application of a demetalization auxiliary agent.The demetalization agent comprises a core-shell structure which is composed of an organic material with a chelating functional group, the core-shell structure comprises a core body and a shell layer, the core body is submicron organic polymer particles, the shell layer is an amphiphilic polymer, and the shell layer is a hydrophobic polymer. The surface is connected with a functional group with strong electrostatic adsorption and metal chelating capability. The preparation method of the demetalization agent comprises the steps of connection initiation and preparation of the demetalization agent. The demetallization auxiliary agent has strong chelating ability in a water phase, and metal chelated by the demetallization auxiliary agent can be transferred to the demetallization auxiliary agent. In addition, the invention discloses application of the demetalliza