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Slow-release chlorine dioxide-supporting zeolite carrier and preparation method thereof

A chlorine dioxide zeolite, slow-release technology, applied in chemical instruments and methods, botanical equipment and methods, separation methods, etc., can solve the problems of short service life, low adsorption capacity, difficult storage, etc., and achieve long service life , the release rate is stable, and the effect of increasing the adsorption effect

Inactive Publication Date: 2018-08-31
张志 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the solid carriers have low adsorption capacity, short service life after immobilized chlorine dioxide, difficult to store, poor effect, etc.

Method used

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  • Slow-release chlorine dioxide-supporting zeolite carrier and preparation method thereof
  • Slow-release chlorine dioxide-supporting zeolite carrier and preparation method thereof
  • Slow-release chlorine dioxide-supporting zeolite carrier and preparation method thereof

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Effect test

Embodiment 1

[0024] The preparation method of a slow-release type immobilized chlorine dioxide zeolite carrier of the present invention is as follows:

[0025] (1) Prepare a mineral acid solution containing a surfactant. The surfactant is one or a mixture of perfluorononoxybenzene sodium sulfonate (OBS), sodium dodecylbenzenesulfonate, sodium lauryl sulfate, cocamidopropyl betaine, The addition amount is 1000-5000 mg / L of the total weight of the acid solution; the inorganic acid is one or a mixture of hydrochloric acid, sulfuric acid, and nitric acid, and the concentration is 0.5-5 mol / L; The acid-modified zeolite particles are obtained by suction filtration after immersing in an acid solution added with a surfactant at a ratio of 1:10 to 1:20 by weight to volume. The crystal structure of natural zeolite consists of three parts: aluminosilicate framework, the pores and cavities of exchangeable cations in the framework, and water molecules in the potential phase; this structure of natural ...

Embodiment 2

[0033] The preparation method of a slow-release type immobilized chlorine dioxide zeolite carrier is as follows:

[0034](1) Prepare a solution containing 1000 mg / L of perfluorononoxybenzene sulfonate (OBS) and 3 mol / L of hydrochloric acid as a surfactant; soak 0.5-1mm natural zeolite at a ratio of 1:10 by weight and volume of solid to liquid After adding the surfactant to the acid solution for 1-2 hours, the acid-modified zeolite particles are obtained by suction filtration;

[0035] (2) Prepare a nitrate compound solution, which contains 0.2mol / L iron nitrate, 0.2mol / L manganese nitrate, and 0.1mol / L copper nitrate. Soak the acid-modified zeolite and the nitrate solution for 12 hours at a solid-to-liquid weight-to-volume ratio of 1:15, drain the supernatant, and roast at 500°C for 4 hours to obtain transition metal-loaded zeolite particles;

[0036] (3) Prepare coating agent. Mix sodium chlorite powder, silica gel powder and diatomaceous earth in a V-type mixer in a weight...

Embodiment 3

[0042] The preparation method of a slow-release type immobilized chlorine dioxide zeolite carrier is as follows:

[0043] (1) Prepare a mixed solution containing surfactant sodium dodecylbenzenesulfonate, sodium dodecylsulfate, sulfuric acid, nitric acid, the concentration of sodium dodecylbenzenesulfonate is 2000mg / L, dodecylbenzenesulfonate The concentration of sodium sulfate is 1000mg / L, the concentration of sulfuric acid is 0.5mol / L, and the concentration of nitric acid is 0.5mol / L; soak 2-3mm natural zeolite in the mixed solution according to the ratio of solid-liquid weight to volume 1:15 2 hours, suction filtration to obtain acid-modified zeolite particles;

[0044] (2) Prepare a nitrate solution containing 0.1mol / L cerium nitrate, 0.2mol / L manganese nitrate, and 0.2mol / L copper nitrate, and mix the acid-modified zeolite and the nitrate solution in a ratio of 1:15 by solid-liquid weight-volume ratio After soaking for 20 hours, draining the supernatant, and roasting at ...

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Abstract

The invention discloses a slow-release chlorine dioxide-supporting zeolite carrier and a preparation method thereof. The preparation method comprises the following steps: S1, adding a surfactant intoan acid solution, soaking zeolite in the acid solution, and performing solid-liquid separation to obtain modified zeolite; S2, impregnating the modified zeolite in a transition metal salt solution, and then performing solid-liquid separation and calcinating to obtain transition metal supported zeolite, wherein the transition metal supported zeolite is used as a carrier for supporting chlorine dioxide. The invention has the beneficial effects as follows: the prepared slow-release chlorine dioxide-supporting zeolite carrier can release chlorine dioxide gas steadily with a stable release rate; activation energy and overpotential of a sodium chlorite self-oxidation reaction in an acidic environment are reduced, and the purpose of slowly activating sodium chlorite to release the chlorine dioxide gas is achieved.

Description

technical field [0001] The invention relates to the field of disinfectant carrier preparation, in particular to a slow-release solid-loaded chlorine dioxide zeolite carrier and a preparation method thereof. Background technique [0002] Chlorine dioxide is a non-toxic, harmless and highly effective strong oxidizing bactericidal disinfectant, which has the functions of antisepsis, deodorization and preservation. It is non-pathogenic, non-teratogenic, and non-carcinogenic. It has been approved by the US Food and Drug Administration (FDA), the US Environmental Protection Agency (EPA) and the US Department of Agriculture (USDA) as early as the 1980s. It is the first class A1 disinfectant in the safe disinfection method. Under the same conditions, its sterilization and disinfection ability is 2.63 times that of chlorine gas, and it has the characteristics of wide sterilization range, good effect, short action time and low dosage. [0003] Due to the special physical properties ...

Claims

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Application Information

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IPC IPC(8): A01N25/08A01N59/00A01P1/00B01D53/81B01D53/72
CPCA01N25/08A01N59/00B01D53/72B01D53/81B01D2251/108B01D2258/06
Inventor 汪扬张志李卫东
Owner 张志
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