Method for bleaching gauze by employing ozone water

A technology of ozone water and gauze, applied in the direction of bleaching products, textiles and papermaking, etc., can solve the problems of uneven concentration, low concentration of ozone water, uneven bleaching, etc.

Inactive Publication Date: 2009-08-26
JIAXING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ozone is a gas with limited solubility in water. As a bleaching agent, the biggest defect is that the concentration of ozone water is low or uneven. When it is used for bleaching a large amount of solids, it will cause uneven bleaching.
Gauze is a continuous object that cannot be evenly mixed with water by stirring. Therefore, the method of bleaching pulp with ozone cannot be simply transplanted to the bleaching of gauze. When ozone is used for bleaching gauze, it is necessary to solve the problem of maintaining the concentration of ozone and Uniformity of Concentration

Method used

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  • Method for bleaching gauze by employing ozone water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Put 10,000 meters of gauze into the bleaching pot, pour in demineralized water, and scour the gauze with high-efficiency compound enzymes. After scouring, the gauze is washed with alkali and water, and the water in the pot is removed. Prepare 1.2 tons of water with a pH value of 4.5 in the batching tank, add 600g of surfactant 601, turn on the ozone generator, open all the electrolytic cells of the ozone generator at the same time, ventilate for about 60 minutes, and the ozone concentration in the water reaches 0.018g / L. 0.8 tons of ozone water in the batching barrel are squeezed into the bleaching pot, and the initial concentration of ozone water in the bleaching pot is 0.016g / L. The remaining 0.4 tons of water continue to pass through the ozone in the material tank, and the ozone water in the material tank and the bleaching pot become an external circulation system through the pump. The concentration of ozone water is adjusted by changing the number of electrolytic c...

Embodiment 2

[0015] Put 10,000 meters of gauze into the bleaching pot, add demineralized water, and then use high-efficiency compound enzymes to scour the gauze. After scalding, the gauze is washed with alkali and water, and the water in the pot is drained. Prepare 1.0 tons of water with a pH value of 5 in the batching tank, add 500g of surfactant 601, turn on the ozone generator, open all the electrolytic cells of the ozone generator at the same time, ventilate for about 30 minutes, and the ozone concentration in the water reaches 0.018g / L. Pour 0.8 tons of ozone water in the batching barrel into the bleaching pot, and measure the initial concentration of ozone in the bleaching pot to be 0.016g / L. The remaining 0.2 tons of water continue to pass through the ozone in the batching tank, and the ozone water in the batching tank and the bleach pot become an external circulation system through a pump. Adjust the concentration of ozone water by changing the number of electrolytic cells used in ...

Embodiment 3

[0017] Put 10,000 meters of gauze into the bleaching pot, pour in demineralized water, and scour the gauze with high-efficiency compound enzymes. After scouring, the gauze is washed with alkali and water, and the water in the pot is removed. Prepare 1.4 tons of water with a pH value of 5.5 in the batching tank, add 700g of surfactant 601, turn on the ozone generator, open all the electrolytic cells of the ozone generator at the same time, ventilate for about 30 minutes, and the water temperature is 20 ° C. The ozone concentration in the water reaches 0.018 g / L. 0.8 tons of ozone water in the batching barrel is driven into the bleaching pot, and the initial concentration of ozone in the bleaching pot is measured to be 0.015g / L. The remaining 0.6 tons of water continue to pass through the ozone in the material tank, and the ozone water in the material tank and the bleaching pot become an external circulation system through the pump. Adjust the concentration of ozone water by c...

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Abstract

The process of bleaching gauze with ozone water includes: compounding ozone water through introducing weak acid water solution into a barrel and adding surfactant; bleaching gauze after being enzyme scoured, alkali washed and water washed with ozone water in a bleaching kettle, and washing bleached gauze with cold water and hot water. During the bleaching process, ozone water is circulated between the bleaching kettle and the compounding barrel, and ozone is introduced into the compounding barrel to maintain the concentration of the ozone water. The process can bleach gauze homogeneously and the bleached gauze can reach whiteness over 90 %.

Description

technical field [0001] The invention relates to a method for bleaching medical gauze, a method for bleaching gauze with ozone water. Background technique [0002] The traditional bleaching process of medical gauze uses hydrogen peroxide as the bleaching agent. This method needs to be carried out under alkaline conditions with a pH of about 10-11, and a bleaching temperature of 100°C. There are problems such as high energy consumption, sometimes unsatisfactory bleaching effect on enzyme-scoured gauze, and alkaline conditions complicate the follow-up process. [0003] Ozone is a strong oxidizing agent with a half-life of 20-30 minutes in aqueous solution. Its decomposition is mainly due to its strong oxidation, rather than simple self-decomposition. The decomposition products of ozone are mainly molecular oxygen and highly active hydroxyl radicals, which can oxidize most organic substances and easily react with -SH, =S, -NH 2 , =NH, -OH (phenol) and -CHO and other reaction...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06L3/02D06L4/13
Inventor 吴建一张帆林强
Owner JIAXING UNIV
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