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Water treatment defluorination agent and preparation method thereof

A technology of water treatment and pharmaceuticals, which is applied in the directions of water/sewage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. It can solve the problem of harsh process conditions, unfavorable large-scale quantitative production, and complicated preparation process To achieve the effect of enhancing the complexation effect, obvious effect of fluorine removal, and changing the floc structure

Pending Publication Date: 2021-09-17
神美科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of this method is complex and the process conditions are harsh, which is not conducive to large-scale quantitative production

Method used

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  • Water treatment defluorination agent and preparation method thereof

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Effect test

Embodiment 1

[0033] According to the following experimental procedures, the fluoride removal agent CF-1 was prepared. Specific steps are as follows:

[0034] Step 1: Weigh a fixed amount of sodium silicate and dissolve it in quantitative water to obtain a sodium silicate solution with a mass concentration of 3-5%. Put the sodium silicate solution in a constant temperature water bath, set the constant temperature at 50°C, and quickly Stir for 20 minutes to obtain a colorless and transparent solution, add dilute hydrochloric acid solution with a mass concentration of 15% for activation until pH = 4.5, stir and react for 30 minutes, and let stand for 20 minutes after the reaction to obtain solution A.

[0035] Step 2: Weigh a fixed amount of aluminum chloride hexahydrate solid, and slowly add it to solution A under constant stirring. The mass ratio of aluminum chloride hexahydrate solid mass to solution A is 3:10. The solution gradually changed from turbid to clear, and the stirring time was...

Embodiment 2

[0039] Prepare the fluorine removal agent CF-2 according to the following experimental procedures. Specific steps are as follows:

[0040] Step 1: Weigh a fixed amount of sodium silicate and dissolve it in quantitative water to obtain a sodium silicate solution with a mass concentration of 3-5%. Put the sodium silicate solution in a constant temperature water bath, set the constant temperature at 50°C, and quickly Stir for 20 minutes to obtain a colorless and transparent solution, add dilute hydrochloric acid solution with a mass concentration of 15% for activation until pH = 4.0, stir and react for 30 minutes, and let stand for 20 minutes after the reaction to obtain solution A.

[0041] Step 2: Weigh a fixed amount of aluminum chloride hexahydrate solid, and slowly add it to solution A under constant stirring, the mass ratio of aluminum chloride hexahydrate solid mass to solution A is 2:10. The solution gradually changed from turbid to clear, and the stirring time was 20 mi...

Embodiment 3

[0045] Prepare the fluorine removal agent CF-3 according to the following experimental procedures. Specific steps are as follows:

[0046] Step 1: Weigh a fixed amount of sodium silicate and dissolve it in quantitative water to obtain a sodium silicate solution with a mass concentration of 3-5%. Put the sodium silicate solution in a constant temperature water bath, set the constant temperature at 50°C, and quickly Stir for 20 minutes to obtain a colorless transparent solution, add dilute hydrochloric acid solution with a mass concentration of 15% for activation, until pH = 4.3, stir for 30 minutes, and stand for 20 minutes after the reaction to obtain solution A.

[0047] Step 2: Weigh a fixed amount of aluminum chloride hexahydrate solid, and slowly add it to solution A under constant stirring. The mass ratio of aluminum chloride hexahydrate solid mass to solution A is 4:10. The solution gradually changed from turbid to clear, and the stirring time was 20 minutes. Continue t...

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Abstract

The invention discloses a preparation method of a water treatment defluorination agent. The preparation method is characterized by comprising the following steps: step 1, preparing a sodium silicate solution, and adding a diluted hydrochloric acid solution for activation to obtain a solution A; step 2, weighing a first fixed amount of aluminum chloride hexahydrate solid, adding the aluminum chloride hexahydrate solid into the solution A, stirring for 10-30 minutes, continuously weighing a second fixed amount of ferric chloride hexahydrate solid, slowly adding the ferric chloride hexahydrate solid into the solution until the color of the solution becomes dark and turbid, continuously stirring, gradually clarifying the solution, and finally turning into a reddish brown transparent solution, so as to obtain a solution B; step 3, preparing a sodium carboxymethyl cellulose solution, namely a solution C; and step 4, placing the prepared solution B and the solution C in a constant-temperature water bath kettle according to the proportion, fully mixing and reacting in a high-speed stirring and heating state, and after the reaction is finished, obtaining the final defluorination agent solution. The fluorine removal rate of the deep defluorination agent can reach 95% or above, the fluorine removal rate is high, the fluorine removal effect is obvious, and deep fluorine removal of fluorine-containing wastewater can be achieved.

Description

technical field [0001] The invention belongs to the technical field of fluorine-containing wastewater treatment, and in particular relates to a water treatment fluoride removal agent and a preparation method thereof. Background technique [0002] Fluoride is an indispensable raw material for the production of many chemical products. It is widely used in iron and steel smelting, coal chemical industry, electroplating and other industries. During the production and processing of aluminum molds and fertilizers, a large amount of fluorine-containing wastewater is often produced. For high-concentration fluoride-containing wastewater, multi-stage treatment is required to meet the national GB 8978-1996 "Comprehensive Discharge Standard for Sewage" in which the concentration of fluoride is less than 10mg / L. For the wastewater discharged by inorganic chemical enterprises, the state requires that the concentration of fluoride should be lower than 6mg / L. National GB3838-2002 "Surface ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/56C02F101/14
CPCC02F1/5236C02F1/56C02F2101/14
Inventor 郑搏英张亮亮张襄柯建怡石伟杰崔秀菊何永峰
Owner 神美科技有限公司
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