Chlor-alkali wastewater treating agent and preparation method thereof

Abstract

The invention discloses a chlor-alkali wastewater treating agent and a preparation method thereof. The chlor-alkali wastewater treating agent comprises raw materials in parts by weight as follows: 30-50 parts of sodium silicate, 60-70 parts of limestone, 20-40 parts of triethoxysilyl propyl glyceryl ether and 15-40 parts of citric acid. During preparation, water is added to the citric acid, a citric acid aqueous solution with the concentration of 2-5 mol / l is prepared, sodium silicate and the citric acid aqueous solution are fed into a reaction kettle to be heated and stirred for 1-15 h, and the heating temperature is 50-100 DEG C; triethoxysilyl propyl glyceryl ether is added to the reaction kettle and is heated and stirred for 5-15 h under nitrogen atmosphere, and the heating temperature is 70-80 DEG C; the temperature is reduced to 30-40 DEG C, the limestone is added, the mixture is stirred for 5-12 h, and the treating agent is obtained. The chlor-alkali wastewater treating agent has the advantages of easy availability of raw materials, low cost, simple process, simplicity and convenience in operation and good treating effect, and is used for treating industrial wastewater such as chlor-alkali containing daily industrial wastewater, food production wastewater and the like.

Description

Technical field [0001] The invention relates to the field of sewage treatment, in particular to a chlor-alkali wastewater treatment agent and a preparation method thereof. Background technique [0002] The chlor-alkali industry is one of the most basic chemical industries, including polyvinyl chloride resin, caustic soda, and hydrochloric acid. Chlor-alkali products such as liquid chlorine are indispensable substances for the national economy and people's lives, and occupy an important position in the national economy and national defense construction. At the same time, the chlor-alkali industry also has relatively large environmental pollution. As people's awareness of environmental protection increases, more and more attention is paid to the pollution caused by the chemical production process based on the chlor-alkali industry and the impact of its products on the environment. Therefore, while giving full play to the role of the chlor-alkali industry and chemical production ba...

AI Technical Summary

Problems solved by technology

At present, the simple acid-base neutralization method is often used in the treatment of alkaline wastewater, which not only consumes a large amount of acid solution, but also increases the salinity of the water body, which brings difficulties to the subsequent treatment; on the other hand, simply adjusting the acid-base cannot make the The organic matter in the water body is degraded, so the COD of the water body is still high, and other methods must be used for combined treatment