Modified sodium percarbonate and its preparing process

A sodium percarbonate and modification technology, which is applied in the field of oxygen-containing bleaching agents, can solve the problems that sodium percarbonate cannot be mixed with additives, the performance improvement is small, and the application range of sodium percarbonate is limited, so as to achieve an effect that is beneficial to environmental protection

Inactive Publication Date: 2005-01-19
ZHEJIANG JINKE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the storage time of SPC products is short, which limits the application range of sodium percarbonate
[0004] The sodium percarbonate disclosed in Chinese patent CN 1389554A is used as the base material of oxygen-containing detergent, but according to the performance of sodium carbonate, it cannot be compatible with alkaline protease, nor can it be shared with activator TAED. Therefore, percarbonate Sodium cannot be mixed with these additives
However, the performance of sodium percarbonate produced by the coating method of a single substance is very small, and the performance of moisture stability and low temperature decomposition has not changed.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Get 131 grams of sodium carbonate and 22 grams of sodium carboxymethylcellulose, add in a 1000 ml beaker, add water, start the shear emulsifier for 3 to 5 minutes, and prepare a coating suspension with a concentration of 49%.

[0026] 400 grams of particle diameters are 0.2 mm sodium percarbonate particles (water content 2%) and the above-mentioned suspension are added to the mixer, start the constant speed stirrer (300 rpm), and stir for 12 minutes; then, take out the wet mixture from the mixer. The modified sodium percarbonate product is put into the fluidized bed dryer for drying; the air supply temperature of the dryer is 115±2°C, when the outlet air temperature of the dryer is 65±1°C, the fluidized drying ends; finally the product Naturally cool to room temperature, take out the modified sodium percarbonate finished product.

Embodiment 2

[0028] Take 80 grams of sodium carbonate, 36 grams of sodium carboxymethylcellulose, and 33 grams of sodium polyacrylate (content 30%), and mix them with water to prepare a suspension with a concentration of 50%. The above suspension is mixed with 500 grams of sodium percarbonate particles with a water content of 10% and a particle size of 0.5 mm for 15 minutes. When the temperature is 62±1°C, the drying ends.

Embodiment 3

[0030] Get 120 grams of sodium carbonate, 25 grams of sodium carboxymethyl cellulose, and 30 grams of sodium polyacrylate (content 30%), mix it with water into a solution of 40% concentration, and mix it with 487 grams of percarbonic acid with a moisture content of 18.2% and a particle size of 0.1 mm. Sodium particles are mixed, and others are identical with embodiment 2.

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Abstract

The invention discloses a modified sodium percarbonate and its preparing process, wherein the modified sodium percarbonate comprises sodium carbonate particles and coating material formed from alkali metal chloride salt and organic film forming agent, wherein the alkali metal chloride salt employs sodium carbonate and sodium sulfate, the organic film forming agent employs carboxycellulose sodium and sodium polyacrylate.

Description

technical field [0001] The invention belongs to the technical field of oxygen-containing bleaching agents, in particular to a modified sodium percarbonate and a preparation method thereof. Background technique [0002] Sodium percarbonate (SPC for short) is sodium percarbonate peroxide combined with hydrogen peroxide instead of crystal water, molecular formula: 2Na 2 CO 3 ·3H 2 O, sodium percarbonate is also called hydrogen peroxide in solid form because it contains higher active oxygen > 10.5%. Sodium percarbonate is not very stable with water and will show reduced activity within an hour if dissolved in water, but it will work in lower temperature washes. Sodium percarbonate in alkaline solution, H 2 o 2 Release atomic oxygen, which can play a strong bleaching effect. [0003] The wet stability of sodium percarbonate is poor, and when it is used as household detergent, moisture in the detergent and other cleaning aids (such as zeolite) will...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B15/10C09C3/10
Inventor 朱志刚章金龙
Owner ZHEJIANG JINKE CHEM
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