Polymerization ferric sulfate water treatment agent and preparation method thereof

A polymeric sulfuric acid and treatment agent technology, applied in the direction of ferric sulfate, flocculation/precipitation water/sewage treatment, etc., can solve the problems of impurity in the product, high production cost, unreachable, etc., and achieve low raw material consumption, low cost, and production fast effect

Active Publication Date: 2013-07-31
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

Patent application 201110148961.3 discloses a preparation method of polyferric flocculant, which uses direct oxidation method to produce polyferric sulfate water treatment agent, but the method is difficult to operate, the production cost is high, and the product contains impurities, which cannot reach the mass fraction of total iron ≥11% (liquid) national standard

Method used

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  • Polymerization ferric sulfate water treatment agent and preparation method thereof
  • Polymerization ferric sulfate water treatment agent and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0026] (1) Add 100.0g FeSO 4 ·7H 2 O mixes with 30.0g water, obtains mixed solution;

[0027] (2) 30wt% H under normal pressure 2 o 2 40.8 g of the aqueous solution was added to the mixed solution in step (1), and the temperature was lowered while stirring, and the temperature of the solution was controlled not to exceed 40°C to obtain a reaction solution;

[0028] (3) Add 10.0 g of 98wt% concentrated sulfuric acid to the reaction solution of step (2), stir evenly to obtain a polyferric sulfate water treatment agent; detect the conversion rate of iron after the reaction, Fe 2+ converted to Fe 3+ The conversion rate reaches 99.97%; the total iron mass fraction of the polyferric sulfate water treatment agent is 11.1%.

Embodiment 2

[0030] (1) Add 50.0g FeSO 4 ·7H 2 O is mixed with 20.0g water to obtain a mixed solution;

[0031] (2) 30wt% H under normal pressure 2 o 2 15.3 g of the aqueous solution was added to the mixed solution in step (1), and the temperature was lowered while stirring, and the temperature of the solution was controlled not to exceed 40°C to obtain a reaction solution;

[0032] (3) Add 4.0g of 98wt% concentrated sulfuric acid to the reaction solution of step (2), stir evenly to obtain a polymeric ferric sulfate water treatment agent; detect the conversion rate of iron after the reaction, Fe 2+ converted to Fe 3+ The conversion rate reaches 99.96%; the total iron mass fraction of the polyferric sulfate water treatment agent is 11.3%.

Embodiment 3

[0034] (1) Add 30g FeSO 4 ·7H 2 O mixes with 15g water, obtains mixed solution;

[0035] (2) 30wt%H at normal pressure 2 o 2 Add 6.7g of the aqueous solution into the mixed solution in step (1), and carry out cooling treatment while stirring, and control the temperature of the solution not to exceed 40°C to obtain a reaction solution;

[0036] (3) Add 1.2g of 98wt% concentrated sulfuric acid to the reaction solution of step (2), stir evenly to obtain polyferric sulfate water treatment agent; detect the conversion rate of iron after the reaction, Fe 2+ converted to Fe 3+ The conversion rate reaches 99.99%; the total iron mass fraction of the polyferric sulfate water treatment agent is 11.4%.

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Abstract

The present invention discloses a polymerization ferric sulfate water treatment agent and a preparation method thereof. According to the present invention, H2O2 and FeSO4.7H2O are adopted, a molar ratio of the H2O2 to the FeSO4.7H2O is 1.1-2.0:2, and the H2O2 and Fe<2+> are subjected to an oxidation reaction to prepare the polymerization ferric sulfate water treatment agent so as to rapidly produce products meeting user requirements, wherein production is rapid, a reaction temperature is controlled no higher than 40 DEG C so as to ensure a H2O2 utilization rate and a Fe<2+> conversion rate, and raw material utilization rate can be more than 95%; and the method has characteristics of simple production process, simple reaction apparatus, easy operation, low raw material consumption, and low cost, and can be used for industrial production.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, in particular to a polymeric ferric sulfate water treatment agent and a preparation method thereof. Background technique [0002] Polymerized ferric sulfate is a high-quality and efficient inorganic iron salt polymer flocculant, which has the functions of decolorization, deodorization, turbidity removal, oil removal, dehydration, and removal of organic matter (COD) in wastewater. It also has excellent coagulation performance, alum It has the advantages of dense flowers and good sedimentation performance, and is widely used in the treatment of industrial wastewater and drinking water supply, especially in the sludge dewatering process, which has the advantages of low sludge moisture content and stable treatment effect. [0003] At present, the production methods of polyferric sulfate are mainly divided into two categories, catalytic oxidation method and direct oxidation method. C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/14C02F1/52
Inventor 汪晓军詹德明崔家琪林旭龙
Owner SOUTH CHINA UNIV OF TECH
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