A method for rapidly preparing polysilicate aluminum ferric sulfate by one-pot cooking microwave radiation method

Abstract

The invention discloses a method for rapidly preparing polysilicate aluminum ferric sulfate by a one-pot cooking microwave radiation method. It mainly uses sodium silicate, sulfuric acid, sodium carbonate, iron sulfate and aluminum sulfate as raw materials. The preparation method is as follows: sodium silicate Dissolve in deionized water, adjust the pH to 1-4, and activate at room temperature for 10-30 minutes; then add ferric sulfate and aluminum sulfate to adjust the pH to 0.5-3.0; put it into a microwave reactor for 1-20 minutes and take it out. Aging at room temperature for 12 to 24 hours, and drying to obtain a solid polysilicate aluminum ferric sulfate product. The present invention has the advantages of low production cost, simple process flow, low energy consumption, fast speed, no secondary pollution, good product performance, high product added value, etc., and can be applied to various water treatment and purification fields, and has fast and high turbidity removal rate. high merit.

Description

technical field [0001] The invention relates to a method for preparing a polymer coagulant polyaluminum silicate sulfate, in particular to a method for rapidly preparing polyaluminum sulfate polysilicate by a one-pot cooking microwave radiation method, and belongs to the technical field of water treatment and purification. Background technique [0002] In the 1980s, Canada's Handy Company first developed polysilicate aluminum sulfate, and domestic research on it began in the 1990s. In 1997, Gao Baoyu and others also prepared polysilicate aluminum sulfate coagulant, which has good treatment effect on low temperature and low turbidity water, printing and dyeing wastewater, high turbidity coal industry wastewater, etc. The disadvantage is that the treated water contains residual aluminum. [0003] The research on polyiron silicate type coagulant is relatively late, and it was first discovered in foreign countries in the 1990s, among which Japan has done more research on it. I...

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Problems solved by technology

Comparative analysis of the above studies found that although predecessors used different raw materials to prepare PSAFS, most of them were prepared by hydrothermal synthesis, and some were prepared by compounding technology. These methods have complex processes, long chemical reaction time, and high energy consumption. , poor efficiency and other shortcomings, and the use of mineral raw materials containing aluminum and iron elements for preparation, such as: Xinghong, etc. Experimental research. Journal of Safety and Environment, 2014, 14(1): 207-211), steelmaking sludge was used to prepare polyferric aluminum sulfate through acid leaching and oxidation polymerization, and a certain amount of activated silicon was added to the prepared polyferric aluminum sulfate Polysilicon ferric aluminum sulfate can be obtained by acid, but because it has not removed harmful heavy metal ions and radioactive atoms, it is not suitable for the treatment of drinking water and other water sources, and there are still problems such as secondary pollution

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