Preparation method of efficient ferric chloride sulfate water purifying agent

Abstract

The invention discloses a preparation method of an efficient ferric chloride sulfate water purifying agent, and belongs to the technical field of water treatment agents. The method is characterized bycomprising the following steps: conveying ferrous sulfate, steel pickling waste liquid, sodium nitrite and water into a reactor; and introducing oxygen into the reactor by using a pipeline jet pump to carry out oxidative polymerization reaction, controlling the introduction speed of the oxygen to be 5 m<3> / h to 6 m<3> / h, the temperature to be 67 DEG C to 72 DEG C and the pressure to be 0.045-0.055 MPa, and finishing the polymerization when the oxygen stops being consumed. Ferrous sulfate is subjected to an oxidative polymerization reaction in an acidic medium by using oxygen as an oxidant under the action of a catalyst (sodium nitrite) to prepare the ferric chloride sulfate. The preparation process is safe, and the obtained product has strong adsorption capacity and good water purification effect, so that the addition amount is small.

Description

technical field [0001] The invention discloses a preparation method of a high-efficiency iron bis-acid water purifier, which belongs to the technical field of water treatment agents. Background technique [0002] Water purifiers are chemicals that can react with other impurities in water when put into water. Mainly for the purpose of water purification. Commonly used water purifiers include polyaluminum chloride, polyaluminum ferric chloride, basic aluminum chloride, polyacrylamide, ferrous sulfate, aluminum sulfate, polyferric sulfate, etc. The preparation of polyferric sulfate mainly includes direct oxidation method and catalytic oxidation method. The preparation of most PFS adopts the direct oxidation method. The process route of this method is relatively simple. It can reduce equipment investment and production links and reduce equipment costs when used in industrial production. However, this production process must rely on oxidants, such as: H 2 o 2 , KClO 3 、HNO ...

AI Technical Summary

Problems solved by technology

Its two, the dosage of sodium chlorate is difficult to control, and dosage is little, causes Fe 2+ incomplete oxidation

If the dosage is large, there will be some chlorate residues. Since chlorate is relatively stable, when it is used for water treatment coagulation, there will be chlorate residues that will pollute the water body.

Secondly, the synthesis of PFCS by chlorine gas oxidation is introduced: acidity and chlorine gas flow rate are the key points for the synthesis of PFCS. The stronger the acidity, the lower the basicity of the synthesis, and the worse the product application effect. The lower the pH, the more difficult it is to control the pH in the later stage of the reaction

It is difficult to control the amount of chlorine gas introduced, too much chlorine gas will cause waste of chlorine gas and pollute the environment, which will pose a great hidden danger to the safety of operators