Methods for preparing and applying efficient dispersing agents for ethylene plants

The invention relates to methods for preparing and applying efficient dispersing agents for ethylene plants. The methods have the advantages that the efficient dispersing agents comprise ester compound and ketone compound components, accordingly, the running time of separation systems of the ethylene plants can be effectively prolonged, the yield of ethylene products can be increased, and the quality of the ethylene products can be improved; optional harmful effects on follow-up product processing can be prevented, and accordingly high economic benefits can be generated by the ethylene plants in production procedures; good dispersing effects can be realized by the efficient dispersing agents, and the efficient dispersing agents are low in cost and viscosity and convenient to use and are safe and environmentally friendly.