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Slow-release immobilized chlorine dioxide particles and preparation method of particles

A chlorine dioxide, slow-release technology, applied in chemical instruments and methods, botanical equipment and methods, separation methods, etc., can solve the problems of short service cycle, single use, difficult to store, etc., and achieve long service life of finished products. The finished product is safe and reliable, and the effect of improving the shelf life of the finished product

Inactive Publication Date: 2018-09-04
张志 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the immobilized adsorbents are expensive, and the immobilized finished products have disadvantages such as single use, short service life, difficult storage, and poor effect.

Method used

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  • Slow-release immobilized chlorine dioxide particles and preparation method of particles
  • Slow-release immobilized chlorine dioxide particles and preparation method of particles
  • Slow-release immobilized chlorine dioxide particles and preparation method of particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of a kind of sustained-release type immobilized chlorine dioxide particle of the present invention is as follows:

[0029] (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 na...

Embodiment 2

[0037] A kind of preparation method of slow release type immobilized chlorine dioxide particle is as follows:

[0038] (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;

[0039] (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;

[0040] (3) Prepare coating agent. Mix sodium chlorite powder, silica gel powder and diatomaceous earth in a V-type mixer in a weight r...

Embodiment 3

[0046] A kind of preparation method of slow release type immobilized chlorine dioxide particle is as follows:

[0047] (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;

[0048] (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 800...

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Abstract

The invention discloses slow-release immobilized chlorine dioxide particles and a preparation method of the particles. The method comprises the following steps that S1, a surfactant is added to an acid solution, natural zeolite particles are immersed into the acid solution, and then modified natural zeolite particles are obtained through solid-liquid separation; S2, the modified natural zeolite particles are soaked in a transition metal salt solution, and then through solid-liquid separation and calcination, load transition metal zeolite particles are obtained; S3, sodium chlorite powder, silica gel powder and diatomite are mixed according to a proportion, and a covering agent is obtained; S4, the covering agent and the load transition metal zeolite particles are mixed, put into a pelletizer and sprayed with a binding agent, and after covering, pelletizing and drying are conducted, the slow-release immobilized chlorine dioxide particles are obtained; S5, the slow-release immobilized chlorine dioxide particles are placed in a ventilation bag. The slow-release immobilized chlorine dioxide particles release chlorine dioxide gas slowly, the preservation and application period is long,and the particles have the functions such as sterilization and formaldehyde degradation.

Description

technical field [0001] The invention relates to the field of preparation of air purifiers, in particular to a slow-release solid-carrying chlorine dioxide particle 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] The ability of chlorine dioxide to remove chemic...

Claims

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Application Information

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