Production process of polymerized diacid ferro-aluminum for water treatment

Abstract

The invention discloses a production process of polymerized diacid ferro-aluminum for water treatment. The preparation method comprises the following steps: a, under stirring, reducing a proper amountof water, 127-168 parts of hydrochloric acid with the total acidity of 30-32% and 8-14 parts of sulfuric acid with the total acidity of 97-99% into a reaction tank for mixing; adding 35-58 parts of iron-containing bauxite trihydrate powder with the aluminum oxide content of 40-45% and the iron oxide content of 20-25% into the mixture at normal pressure and normal temperature, and stirring the mixture to be dissolved; continuously raising the temperature until the temperature of the reaction system is controlled at 105-125 DEG C, and reacting for 3.5-5.0 hours under normal pressure; b, supplementing a proper amount of water into the feed liquid obtained in the step a while stirring; adding 46-63 parts of calcium aluminate powder, raising the temperature of the feed liquid by utilizing reaction self-heating in the adding process, adjusting the density of the feed liquid to be greater than or equal to 1.25 g / ml by using water after adding is finished, then adding 4-7 parts of a synergisttrisodium phosphate, raising the temperature until the temperature of a reaction system is controlled to be 100-115 DEG C, and reacting for 3-4 hours under normal pressure; and c, discharging the feed liquid obtained in the step b to obtain mother liquor.

Description

technical field [0001] The invention belongs to the technical field of production of polyaluminum iron bisacid, and in particular relates to a production process of polyaluminum iron bisacid for water treatment. Background technique [0002] Polymerized aluminum iron bis-acid is a new type of high-efficiency water purifier, which combines the advantages of aluminum salt series and iron salt series high-efficiency water purifiers. It has high active ingredients, high basicity, high degree of polymerization, dense molecular chain network, It has the advantages of large structure, stronger adsorption and cohesion ability and better water purification effect in the process of water purification. It is an efficient, fast, low consumption, non-toxic and safe inorganic high-efficiency water purifier. [0003] At present, there are mainly two types of polyaluminum iron bisacids: liquid (total active ingredients of aluminum and iron ≥ 10.5%) and solid (total active ingredients of alu...

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Problems solved by technology

[0004] Solid particles are usually left in the solution when preparing bis-aluminum iron, so a solid-liquid separation step is required. The existing solid-liquid separation operations are all carried out by other equipment, that is, to do solid-liquid separation after the solution is taken out, increasing The preparation process of bis-acid aluminum iron is shortened, the preparation efficiency of bis-acid aluminum iron is reduced, and the preparation cost of bis-acid aluminum iron is increased

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