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Preparation method of polysilicate aluminium ferric flocculant

A technology of polyaluminum ferric sulfate and flocculant, which is applied in the fields of ferric sulfate, flocculation/sedimentation water/sewage treatment, etc. It can solve the problems of increasing operation difficulty and complicated operation, and achieves fast formation of alum flowers, high decolorization rate, and process The effect of simple process

Active Publication Date: 2012-11-28
善水(南通)工业技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flocculant prepared by this process has a good water purification function, but this process requires pre-soaking of the raw materials, and the temperature is controlled in stages, and the operation is complicated; in addition, the solid-liquid separation is required after the product is synthesized by this method, which increases the operation. difficulty

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Control the reaction temperature at 60°C, and the molar ratio of Al / Fe is 1:11

[0026] (1) Put 70g of ferrous sulfate heptahydrate, an industrial by-product of titanium dioxide, in a beaker, add 10mL of distilled water, stir while adding, and stir to form a uniform thin paste ferrous sulfate mixture; then slowly add 4.3mL of 98% ferrous sulfate under stirring Concentrated H 2 SO 4 carry out acidification;

[0027] (2) Add 4.5g of sodium chlorate while stirring for oxidation. During this period, in order to fully oxidize ferrous sulfate heptahydrate into ferric sulfate, continuous and slow stirring is required. When a uniform liquid is formed in the beaker without any bubbles, that is, no gas overflows; Dried can be diluted with a small amount of distilled water to replenish the water that will be lost during the polymerization reaction.

[0028] (3) Weigh 7.63g of aluminum sulfate according to AL / Fe=1:11, add 10mL of distilled water to dissolve, add it to the beake...

Embodiment 2

[0036] Control the reaction temperature to 70°C, and the ratio of Al / Fe to 1:10

[0037] (1) Put 70g of ferrous sulfate heptahydrate, an industrial by-product of titanium dioxide, in a beaker, add 10mL of distilled water, stir while adding, and stir to form a uniform thin paste ferrous sulfate mixture; then slowly add 4.3mL of 98% ferrous sulfate under stirring Concentrated H 2 SO 4 Carry out acidification and adjust the pH of the mixed solution at 0.6-1.0;

[0038] (2) Add 4.5g of sodium chlorate while stirring for oxidation. At the same time, stir slowly until a uniform liquid is formed without any bubbles; after the oxidation is completed, if the mixed liquid is too dry, a small amount of distilled water can be added for dilution to supplement the water that will be lost during the polymerization reaction;

[0039] (3) Weigh 8.39g of aluminum sulfate according to AL / Fe=1:10, add 10mL of distilled water to dissolve, add it to the above ferrous sulfate mixture after dissol...

Embodiment 3

[0047] Control the reaction temperature at 80°C, and the ratio of Al / Fe to 1:9

[0048] (1) Put 70g of ferrous sulfate heptahydrate, an industrial by-product of titanium dioxide, in a beaker, add 10mL of distilled water in proportion, stir while adding, and stir to form a uniform thin paste ferrous sulfate mixture; then slowly add 4.3 mL98% concentrated H 2 SO 4 Carry out acidification and adjust the pH of the mixed solution at 0.6-1.0;

[0049] (2) Add 4.5 g of sodium chlorate to the above liquid while stirring to carry out oxidation. At the same time, stir slowly until a uniform liquid is formed without any bubbles; after the oxidation is completed, if the mixed liquid is too dry, a small amount of distilled water can be added for dilution to supplement the water that will be lost during the polymerization reaction;

[0050] (3) Weigh 9.32g of aluminum sulfate according to AL / Fe=1:9, add 10mL of distilled water to dissolve, add it to the above ferrous sulfate mixture afte...

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PUM

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Abstract

The invention discloses a preparation method of a polysilicate aluminium ferric flocculant, which comprises the steps of: dissolving ferrous sulfate heptahydrate, which is a by-product of a titanium white industry and used as a main raw material, in water, regulating the pH value of the dissolved ferrous sulfate heptahydrate to be 0.6-1.0, and then adding titanium white for oxidation; adding aluminum sulfate for polymerization reaction for 30-50min at the water bath temperature of 50-100 DEG C to obtain the polysilicate aluminium ferric flocculant; adding H3PO3 to be used as a stabilizer in the polymerization reaction process; adding a small amount of Na2CO3 when the liquid is even to regulate the alkalization degree of the mixed liquid to be 0.05-0.6; and finally, obtaining a dark-brown polymerized liquid product, i.e. the silicate aluminium ferric flocculant. The preparation method provided by the invention has the advantages of simple process, low cost, and no waste liquid, waste gas, and waste residues in a production process. The product has high content of active flocculation components, is superior to the traditional industrial product in full-ferric content and the flocculation property, and can be widely applied to feed water treatment and sewage and wastewater treatment.

Description

technical field [0001] The invention belongs to the technical field of flocculant preparation, and in particular relates to a preparation method of polyaluminum ferric sulfate flocculant. Background technique [0002] Flocculant is an extremely effective substance for strengthening solid-liquid separation, and its application has penetrated into various departments. Inorganic macromolecular flocculants are mostly cationic polymers such as polyiron or polyaluminum, and the coagulation of colloids is mainly completed by ionic connection through adsorption and bridging. If a certain amount of aluminum ions are added to the active polymeric iron to form cationic polyaluminum ferric sulfate (PAFS) containing aluminum ions, the flocculant can simultaneously undergo electrostatic neutralization, adsorption bridging and The net catches three functions and produces a good flocculation effect. [0003] At present, the commonly used inorganic polymer flocculants are iron-based and al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/14C02F1/52
Inventor 郑怀礼朱国成杨军张鹏陈文源马江雅
Owner 善水(南通)工业技术有限公司
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