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Preparation method of porous effervescent sodium percarbonate particles used as sanitizer

A technology of sodium percarbonate and fungicides, applied in the direction of disinfectants, fungicides, botany equipment and methods, etc., can solve the problems of unfavorable environmental protection, increased production costs, etc., and achieve the effect of energy saving and simplification of the preparation process

Pending Publication Date: 2022-07-29
ZHEJIANG JINKE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of disintegrating agents and binders will not only increase production costs, but also be unfavorable for environmental protection when this type of percarbonated effervescent tablet is used.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Get 500 kg of mother liquor and import it into the double-cone mixing kettle, and the mother liquor includes 8% of soda ash, 18.5% of sodium chloride, 0.85% of hydrogen peroxide, and the remainder is water. Afterwards, 168 kg of light anhydrous sodium carbonate, 56 kg of sodium chloride and 2.5 kg of sodium metasilicate pentahydrate were added to the double-cone mixing kettle and mixed to form an alkaline solution. 409 kg of hydrogen peroxide aqueous solution with a concentration of 27.5% was introduced into the hydrogen peroxide water tank, and 2.5 kg of disodium EDTA and 1.4 kg of magnesium sulfate were added, and stirred evenly. Then, the prepared lye and the aqueous hydrogen peroxide solution were introduced into the reaction kettle for reaction. The flow rate of the lye solution was 1400 kg / h, the flow rate of the aqueous hydrogen peroxide solution was 900 kg / h, and the reaction temperature was maintained between 20 °C and 25 °C. The reaction process took 40 min. ...

Embodiment 2

[0016] Get 750kg of mother liquor and import it into a double-cone mixing kettle. The mother liquor includes 8% of soda ash, 22% of sodium chloride, 1.5% of hydrogen peroxide, and the remainder is water. After adding 250kg of light anhydrous sodium carbonate to the double cone mixing kettle, 83.3kg of sodium chloride and 3.8kg of sodium metasilicate pentahydrate were mixed and configured into lye. Introduce 606kg of aqueous hydrogen peroxide solution with a concentration of 27.5% into the hydrogen peroxide tank, add 3.8kg of disodium EDTA, 2.1kg of magnesium sulfate, and stir evenly. Then the lye and hydrogen peroxide were introduced into the reaction kettle for reaction. The flow rate of the lye solution was 1400 kg / h, the flow rate of hydrogen peroxide was 900 kg / h, the reaction temperature was maintained between 20 and 25 °C, and the reaction process took 40 minutes. After the reaction, the crystallization product in the reaction kettle was separated from the mother liquor ...

Embodiment 3

[0018] Get 900kg of mother liquor and import it into a double-cone mixing kettle. The mother liquor includes 10% soda ash, 17% sodium chloride, 0.5% hydrogen peroxide, and the remainder is water. Then add 300kg of light anhydrous sodium carbonate to the double-cone mixing kettle, and 100kg of sodium chloride and 4.5kg of sodium metasilicate pentahydrate are mixed and configured to form lye. 571.4kg of hydrogen peroxide aqueous solution with a concentration of 35% was introduced into the hydrogen peroxide water tank, and 4.5kg of disodium EDTA and 2.5kg of magnesium sulfate were added, and the mixture was stirred uniformly. Then the lye and hydrogen peroxide were introduced into the reaction kettle for reaction. The flow of lye was 1200 kg / h, the flow of hydrogen peroxide was 800 kg / h, the reaction temperature was maintained between 20 and 25 °C, and the reaction process took 40 min. After the reaction, the crystallization product in the reaction kettle was separated from the m...

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PUM

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Abstract

The invention provides a preparation method of porous effervescent sodium percarbonate serving as a sanitizer, which comprises the following steps: (S1) preparing alkali liquor which comprises mother liquor, sodium carbonate, sodium chloride and a stabilizer; (S2) preparation of a hydrogen peroxide aqueous solution: adding disodium ethylene diamine tetraacetate and magnesium sulfate into the hydrogen peroxide mother solution; (S3) introducing the prepared alkali liquor and hydrogen peroxide aqueous solution into a reaction kettle for reaction, wherein the introduction flow rate of the alkali liquor is 1600-2500 kg / h, the introduction flow rate of the hydrogen peroxide aqueous solution is 600-1000 kg / h, the reaction temperature is 15-30 DEG C, and the reaction time is 30-50 minutes; and (S4) after the reaction is finished, separating a crystallization product from the reaction liquid through a centrifugal machine, and drying to obtain a finished product, wherein the water content of the crystallization product is 16-22%. According to the method, the sodium percarbonate intermediate with the water content of 16%-22% is prepared by controlling the flow of the alkali liquor and the hydrogen peroxide and rapidly reacting, the sodium percarbonate finished product with the loose porous structure can be obtained by drying, and the method is free of a tabletting process, low in equipment investment and lower in energy consumption.

Description

technical field [0001] The invention relates to the preparation of porous effervescent sodium percarbonate granules used as a disinfectant and belongs to the technical field of an inorganic salt peroxide type daily chemical disinfectant. Background technique [0002] Sodium percarbonate is white crystal or crystalline powder at room temperature, molecular formula is 2Na 2 CO 3 ·3H 2 O 2 , about 25% H 2 O 2 , commonly known as solid hydrogen peroxide. Because it contains hydrogen peroxide molecules in its structure, it has strong oxidizing properties and can be decomposed to release active oxygen when wet, so it is suitable for daily chemical washing, textile, medical treatment, papermaking, electroplating and other fields. When used as a disinfectant, the principle of disinfection and sterilization is: the strong oxidative active oxygen released by the decomposition of sodium percarbonate inactivates the microbial protein and causes the death of microorganisms, thereby...

Claims

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Application Information

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IPC IPC(8): A01N25/14A01N59/00A01P1/00A01P3/00C01B15/10
CPCA01N25/14A01N59/00C01B15/103
Inventor 章小兵虞建立魏一帆殷飞杨栋栋李爱妹
Owner ZHEJIANG JINKE CHEM
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