A kind of composite potassium ferrate slow-release disinfectant and its preparation method and use method

A technology of potassium ferrate and disinfectant, which is applied in the direction of botany equipment and methods, chemical instruments and methods, applications, etc., can solve the problems of bentonite moisture absorption suppression, adsorption performance is easily disturbed, and regeneration is difficult, so as to increase the porosity Efficiency and specific surface area, convenient detection and replacement of reagents, and improvement of overall adsorption performance

Active Publication Date: 2020-02-21
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Aiming at the problems that existing potassium ferrate water treatment agents have poor stability, poor oxidation persistence, large amount of agents used, narrow application range, and high cost, one of the purposes of the present invention is to provide a composite potassium ferrate slow-release disinfectant, Potassium ferrate, modified bentonite and β-cyclodextrin polymer are fully mixed and coated, so that potassium ferrate can continue to play a role in the advanced treatment of tail water
[0011] In view of the problems that bentonite needs to be modified during the preparation of adsorbents, its oxidation performance is weak, its adsorption performance is easily disturbed, it is easy to absorb moisture, and it is difficult to regenerate. Another object of the present invention is to provide a composite potassium ferrate slow-release disinfection The preparation method of the agent uses low-cost bentonite as the skeleton material, so that the potassium ferrate crystals are uniformly generated in the interlayer gap of the bentonite, and slowly released during the water treatment process, which reduces the hydrophilicity of the bentonite and makes the absorption of the bentonite Moisture is suppressed

Method used

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  • A kind of composite potassium ferrate slow-release disinfectant and its preparation method and use method
  • A kind of composite potassium ferrate slow-release disinfectant and its preparation method and use method
  • A kind of composite potassium ferrate slow-release disinfectant and its preparation method and use method

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Experimental program
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Effect test

Embodiment 1

[0047] Raw materials: industrial grade calcium-based bentonite, 20 parts of commercially available sodium hydroxide, 10 parts of potassium hydroxide, 10 parts of calcium hypochlorite, ferric nitrate, 2 parts of n-hexane, 1 part of isopropanol, 1 part of ether, β- Cyclodextrin, 10 parts of epichlorohydrin, 20 parts of carboxymethyl cellulose, the raw materials are divided into 6 groups of medicaments, wherein, the mass ratio of ferric nitrate, bentonite, and β-cyclodextrin is shown in Table 1-1. The steps of release type water treatment agent are:

[0048] Table 1-1 Raw material ratio of sustained-release medicament

[0049]

[0050] According to the ratio of raw materials in the above Table 1-1, the calcium-based bentonites of 6 groups were respectively put into a muffle furnace and roasted at 450°C for 2 hours for modification; Heat to dissolve β-cyclodextrin, raise the temperature to 50°C, drop in epichlorohydrin under full stirring, and finish dropping in about 20 minut...

Embodiment 2

[0058] Raw materials: 110 parts of industrial grade calcium-based bentonite, 20 parts of commercially available sodium hydroxide, 13 parts of potassium hydroxide, 13 parts of calcium hypochlorite, 16 parts of iron nitrate, 3 parts of n-hexane, 2 parts of isopropanol, 1 part of ether 300 parts, 300 parts of β-cyclodextrin, 15 parts of epichlorohydrin, 30 parts of carboxymethyl cellulose, the steps of preparing slow-release water treatment agent are:

[0059] The calcium-based bentonite according to the above ratio is put into a muffle furnace and roasted at 450°C for 2 hours for modification; add β-cyclodextrin to 20% sodium hydroxide aqueous solution, slightly heat to dissolve the β-cyclodextrin, and raise the temperature To 60°C, add epichlorohydrin dropwise under full stirring, and drop it in about 30 minutes. Continue to keep warm and stir to react. The viscosity of the mixture gradually increases until the reaction stops when a gel-like solid appears. The white solid obtai...

Embodiment 3

[0065] Raw materials: 120 parts of industrial grade calcium-based bentonite, 20 parts of commercially available sodium hydroxide, 15 parts of potassium hydroxide, 15 parts of calcium hypochlorite, 18 parts of iron nitrate, 4 parts of n-hexane, 2 parts of isopropanol, 2 parts of ether 200 parts, 200 parts of β-cyclodextrin, 20 parts of epichlorohydrin, 40 parts of carboxymethyl cellulose, the steps of preparing slow-release water treatment agent are:

[0066]The calcium-based bentonite according to the above ratio is put into a muffle furnace and roasted at 450°C for 2 hours for modification; add β-cyclodextrin to 20% sodium hydroxide aqueous solution, slightly heat to dissolve the β-cyclodextrin, and raise the temperature To 70°C, add epichlorohydrin dropwise under full stirring, and drop it in about 30 minutes. Continue to keep warm and stir to react. The viscosity of the mixture gradually increases until the reaction stops when a gel-like solid appears. Wash the product alter...

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Abstract

The invention discloses a compound potassium ferrate slow release disinfectant as well as a preparation method and a usage method thereof, and belongs to the field of the advanced treatment of tail water. The compound potassium ferrate slow release disinfectant is prepared from the following preparative raw materials of 20 parts of sodium hydroxide, 10 to 15 parts of potassium hydrate, 10 to 15 parts of calcium hypochlorite, 15 to 18 parts of iron nitrate, 100 to 120 parts of calcium-based bentonite, 100 to 200 parts of beta-cyclodextrin and 10 to 20 parts of epoxy chloropropane. When being used, the compound potassium ferrate slow release disinfectant is used by being combined with 200 to 400 parts of powdery activated carbon and 20 to 40 parts of carboxymethyl cellulose to be made into an activated carbon column with the granularity of 5mm. A water treating agent prepared by the preparation method has good stability and high oxidizability, has persistent oxidizing ability, is persistent in disinfection, is good in effect, does not generate a secondary pollutant, is convenient and quick to use, also hast he ability of removing a little COD (Chemical Oxygen Demand), and can be used for effectively decreasing the chromatic value of the tail water; most raw materials are low-cost and are easily obtained.

Description

technical field [0001] The invention belongs to the field of advanced treatment of tail water, and more specifically relates to a compound potassium ferrate slow-release disinfectant and its preparation method and use method. Background technique [0002] With the expansion of my country's industrial scale and industrial types, a large amount of industrial wastewater is produced in the production process. Especially in petroleum, chemical industry, electrolysis, printing and dyeing, textile and other industries, not only the discharge of wastewater is large, but also the physical and chemical properties of wastewater are complex. A lot of industrial wastewater has high COD, high chroma, contains a variety of heavy metals, and the BOD / COD value is very low, resulting in poor biodegradability of wastewater, so that the tail water after conventional treatment methods still has a certain COD content, color The degree is not up to standard and there are a large number of pathoge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N59/16A01N25/08A01N25/10A01N25/34C02F1/50C02F1/00C02F1/72C02F101/30C02F101/34C02F101/38
CPCA01N25/08A01N25/10A01N25/34A01N59/16C02F1/00C02F1/50C02F1/72C02F2101/308C02F2101/34C02F2101/38C02F2101/40C02F2303/04
Inventor 刘波梁子孙信柏姚芳侯翔宇王德鹏丁新春
Owner NANJING UNIV
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