Anhydrous reaction method for preparing polymeric ferric sulfate
A technology for polymerizing ferric sulfate and water reaction, applied in the direction of ferric sulfate, chemical recovery, etc., can solve the problems of long reaction time, large amount of catalyst, many equipment, etc., and achieve the effect of reducing production cost, energy consumption, and waste gas.
Inactive Publication Date: 2016-03-02
HUNAN YOUHUA ENVIRONMENTAL PROTECTION TECH CO LTD
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Abstract
An anhydrous reaction method for preparing polymeric ferric sulfate is disclosed. According to the method, 2-20 tons of industrial ferrous sulfate and 0.2-1.8 tons of sulfuric acid are added into a specialized stainless steel reaction unit with its volume being 2-20 cubic meters, and the ratio of ferrous sulfate to sulfuric acid is 10:1; in a nearly vacuum state, 2.5-3.5 kg of a catalyst is poured according to each ton of ferrous sulfate, the catalyst is sodium nitrite or dilute nitric acid, and dissolution and reaction are carried out in the same unit; after an oxygen valve reaches 0.02 MPa, pump type stirring is started, pressure is maintained at 0.02-0.04 MPa, reaction temperature is within 100 DEG C, and the reaction lasts for 3-10 h; after qualified through sampling analysis, an emptying valve is turned on, and a few tail gas is sent into an alkali absorption tower to be treated; after saturated, lye returns to be recycled as a catalyst; polymeric ferric sulfate is directly put into a spray drying tower to be dried, so as to obtain a polymeric ferric sulfate spray-dried product. Moisture content of the produced polymeric ferric sulfate is reduced to 25%, standard coal is saved by 65 kg, energy consumption is reduced by 50%, exhaust gas is minimized by 2/3, and production cost is greatly decreased.
Application Domain
Iron sulfatesChemical recycling
Technology Topic
Iron(III) sulfateChemistry +11
Examples
- Experimental program(1)
Example Embodiment
PUM


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