Sterilization algae removal anti-fungus agent and preparation method thereof

The invention relates to a sterilization, algae removal and anti-fungus agent, and its preparing method. It is made of dichlorophen, ethanediamine, caustic soda and water.Wherein, the dichlorophen is made by precommising and heating the chlorophenol, methyl aldehyde, molecular screen and catalyser zinc chloride, as well as backflowing and steaming the p-chlorophenol. The invention has the projecting function of suppressing the microorganism such as mould, fungus, bacteria and algae growing in the organic medium, and the advantages of small dosage, economic cost, long sterilization duration, large pH applicability, convenient processing method and safe usage. It can be used in industry cycle sterilization in water of the departments as fertilizer, chemical fiber, petrochemical plant, oil refining and metallurgy. It is also a merit anti-fungus agent, can be used to sterilize in leather, textile, paper pulp, coating material, wood and organic material.