Prepn process of polymerized iron phosphosulfate

Abstract

The preparation process of polymerized iron phosphosulfate includes adding ferrous sulfate into water at 70-80 deg.c until reaching saturation, filtering, adding oxidant or catalyst to convert two-valent iron into three-valent iron, and adding sodium chlorate and sodium pyrophosphate to react for 20-30 min to obtain the product. The present invention introduces phosphate radical ion to ferrous sulfate skeleton to obtain extremely high alkalisation degree of ferrous sulfacte, and the polymerized iron phosphosulfate as flocculant is easy to hydrolyze, can form large flocculate with high settling rate and may be used to well eliminate BOD, COD, heavy metal, nitrite nitrogen, etc. from sewage.

Description

Technical field:

[0001] The present invention relates to the preparation process of water quality purifying agent, especially the preparation process of polyphosphorus ferric sulfate Background technique:

[0002] The chemical industry has made great contributions to the further development of science and technology, but the "three wastes" produced in the production process have also caused great harm to the environment. The chemical industry is not only a big energy consumer, but also a big polluter. The production of titanium dioxide in my country mainly adopts the sulfuric acid method. In its very extensive production process, the output of ferrous sulfate heptahydrate far exceeds the output of titanium dioxide itself. Due to the narrow use range of ferrous sulfate heptahydrate, the market prospect is bleak, and the transportation Expenses are higher again, so that manufacturers simply pile up ferrous sulfate heptahydrate for a long time and let it run off, which not only ...