Method for preparing poly-silicon-titanium composite flocculant

Abstract

The invention relates to a method for preparing a poly-silicon-titanium composite flocculant. The conventional metal polysilicate flocculants mostly contain aluminum metal, and have the problem of aluminum residue. The method of the invention comprises the following steps of: mixing liquid ethyl orthosilicate and tetraethyl titanate in a container, uniformly stirring at normal temperature, and dropwise adding 0.1 to 0.5 mol / L solution of sodium hydroxide to form mixed solution; and standing and curing the mixed solution for 1 to 2 days to obtain the poly-silicon-titanium composite flocculant.A molar ratio of the added tetraethyl titanate to ethyl orthosilicate is 0.4-0.6:1, and a molar ratio of the total amount of the dropwise added sodium hydroxide to the ethyl orthosilicate is 1-2:1. In the molecule of the poly-silicon-titanium composite flocculant of the invention, silicon and titanium metal ions are uniformly distributed, the production reproducibility and the stability are high,and the poly-silicon-titanium composite flocculant only contains Ti<4+> metal ions besides silicon, does not have the problem of the aluminum residue, and is particularly suitable for the coagulationtreatment of tap water.

Description

technical field

[0001] The invention belongs to the technical field of water treatment, and in particular relates to a polysilicon-titanium composite flocculant, which is suitable for coagulation treatment of tap water. Background technique

[0002] With the rapid economic development, the problem of water pollution in my country has become increasingly serious in recent years. People have been devoting themselves to the development of waste water and water supply water treatment technology, including the indispensable treatment technology of using flocculants to treat domestic water supply and industrial waste water. Compared with other methods, the advantages of water treatment technology using flocculants are simple equipment, easy maintenance and operation, and good treatment effect. The key to the water treatment technology using flocculants is that the chemicals used include inorganic flocculants and organic flocculants. Due to its good flocculation effect, inorganic...