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Process for preparing chlorine dioxide slow-release micro capsule

A technology for slow-release microcapsules and chlorine dioxide, which is applied in the field of fine chemicals and can solve problems such as application limitation and instability of chlorine dioxide.

Inactive Publication Date: 2006-08-23
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It is precisely because of the instability of chlorine dioxide that its application is greatly limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Under vacuum conditions, add concentrated sulfuric acid dropwise to the solution containing potassium chlorate and oxalic acid to generate yellow-green chlorine dioxide gas, absorb it with ice water to obtain 30 grams of chlorine dioxide aqueous solution, and add it dropwise to 90 grams at 20°C In the β-cyclodextrin, stir evenly, dry at 50°C for 1.5 hours, grind to a particle size of 200um, test its release performance, and obtain a slow-release chlorine dioxide microcapsule product.

Embodiment 2

[0020] Under vacuum conditions, add concentrated sulfuric acid dropwise to the solution containing potassium chlorate and oxalic acid to generate yellow-green chlorine dioxide gas, absorb it with ice water to obtain 20 grams of chlorine dioxide aqueous solution, and add it dropwise to 40 grams at 0°C In the β-cyclodextrin, stir evenly, dry at 20°C for 5 hours, store at 0°C for 1 month, grind to a particle size of 500um, test its release performance, and obtain a slow-release chlorine dioxide microcapsule product.

Embodiment 3

[0022] Under vacuum conditions, add concentrated sulfuric acid dropwise to the solution containing potassium chlorate and oxalic acid to generate yellow-green chlorine dioxide gas, absorb it with ice water to obtain 20 grams of chlorine dioxide aqueous solution, and add it dropwise to 200 grams at 0°C In the β-cyclodextrin, stir evenly, dry at 60°C for 0.5 hours, grind until the particle size is 300um, test its release performance, and you can get a slow-release chlorine dioxide microcapsule product.

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PUM

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Abstract

The process of preparing slow-released chlorine dioxide microcapsule includes the following steps: 1. mixing chlorine dioxide aqua and beta-cyclodextrin in the mass ratio of 1 to 2-10 at 0-20deg.c through stirring; and 2. drying at 20-60deg.c for 0.5-5 hr and grinding. The microcapsule has its core separated from outside and not affected by outer humidity, oxygen, ultraviolet ray, etc. and the present invention adopts microcapsule technology in preparing disinfectant and stabilized chlorine dioxide.

Description

technical field [0001] The invention relates to a method for preparing microcapsules, which belongs to the technical field of fine chemicals, in particular to a method for preparing chlorine dioxide microcapsules. Background technique [0002] Chlorine dioxide is one of the excellent disinfectants, and it is being widely used as a disinfectant, oxidant, biocide, algicide, bleach, deodorant, and cleaner in its related fields. Since the advent of chlorine dioxide, it has been used for pulp and fiber bleaching, drinking water disinfection, food processing, sterilization and preservation of meat, fruit, vegetables and aquatic products, industrial cooling water and wastewater treatment, and disinfection and sterilization in clinical medicine. , Disinfection and bleaching of food packaging paper, water injection and oil well unblocking, sanitation and epidemic prevention disinfection, oil decolorization and bleaching and sterilization in flour and rice processing, water disinfecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/00A01N25/28B01J13/02
Inventor 邢宏龙王玉丰陈水林
Owner DONGHUA UNIV
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