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Method for preparing sodium percarbonate

A technology of sodium percarbonate and light sodium carbonate, applied in chemical instruments and methods, peroxide/peroxyhydrate/peroxyacid/superoxide/ozone, inorganic chemistry, etc., can solve the problem of temperature control. Good, strict equipment requirements, high consumption of hydrogen peroxide, to achieve the effect of simple process, small equipment investment, high product active oxygen

Active Publication Date: 2013-11-27
ZHEJIANG JINKE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The rest of the sodium percarbonate dry process is basically fluidized bed spraying, drying and granulation; there are strict requirements on equipment, large dust, and poor temperature control may easily lead to high consumption of hydrogen peroxide.

Method used

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  • Method for preparing sodium percarbonate

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Effect test

Embodiment 1

[0028] 10kg particle diameter is that 0.5mm sodium percarbonate granule is added in the 50L double-cone mixer, adds 0.2kg solid stabilizer magnesium sulfate simultaneously, takes by weighing 50kg hydrogen peroxide solution (with H 2 o 250.1%), and add 0.5kg HEDP and its sodium salt solution, stir and mix well. In addition, add 0.6kg sodium metasilicate pentahydrate to 80um 56kg light soda ash and mix well. Spray the prepared hydrogen peroxide solution into the double-cone mixer, turn on the refrigerated circulating water and multi-stage blower to cool down, when the hydrogen peroxide spray reaches 0.8kg, add the light soda ash mixture while spraying the hydrogen peroxide solution. When the particle size of sodium percarbonate reaches 0.5mm-1.2mm, discharge. At the same time, according to the particle size of the material in the kettle, add 0.3mm sodium percarbonate particles to control the particle size of the product. After the output material is more than 1.2mm, it will be...

Embodiment 2

[0030] Add 15kg 0.4mm sodium percarbonate small particles into a 50L double cone mixer, add 0.15kg solid stabilizer magnesium sulfate at the same time, weigh 50kg hydrogen peroxide solution (in the form of H 2 o 2 60.1% in total), and add 0.45kg of amino trimethylene phosphonic acid and its sodium salt solution, stir and mix evenly. In addition, add 0.4kg sodium hexametaphosphate to 80um 60kg light soda ash and mix well. Spray the prepared hydrogen peroxide solution into the single cone mixer, turn on the refrigerated circulating water and the compressed air unit to cool down, when the hydrogen peroxide spray reaches 0.45kg, add light soda ash mixture while spraying the hydrogen peroxide solution. When the particle size of sodium percarbonate reaches 0.5mm-1.2mm, discharge. At the same time, according to the particle size of the material in the kettle, add 0.36mm sodium percarbonate particles to control the particle size of the product. After the output material is more than...

Embodiment 3

[0032] Add 8kg 0.5mm sodium percarbonate small particles into a 50L double cone mixer, add 0.4kg solid stabilizer magnesium sulfate at the same time, weigh 100kg hydrogen peroxide solution (in the form of H 2 o 2 55% in total), and add 1.2kg maleic acid-acrylic acid copolymer, stir and mix evenly. In addition, add 0.9kg sodium metasilicate pentahydrate and 0.5kg sodium tripolyphosphate to 80um 80kg light soda ash and mix well. Spray the prepared hydrogen peroxide solution into the double-cone mixer, turn on the refrigerated circulating water and multi-stage blower to cool down, when the hydrogen peroxide is sprayed to 0.24kg, add the light soda ash mixture while spraying the hydrogen peroxide solution. When the particle size of sodium percarbonate reaches 0.5mm-1.2mm, discharge. At the same time, according to the particle size of the material in the kettle, add 0.3mm sodium percarbonate particles to control the particle size of the product. After the output material is more ...

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Abstract

The invention discloses a method for preparing sodium percarbonate, which mainly comprises the following steps: preparing a hydrogen peroxide solution; adding fine sodium percarbonate particles into a mixer with cooling equipment to serve as crystal nucleus; spraying the hydrogen peroxide solution into the mixer, and starting the cooling equipment to keep the system reaction temperature at 20 DEG C to 60 DEG C; adding anhydrous light sodium carbonate and a solid stabilizer into the mixer via transportation equipment; when the particle size of sodium percarbonate products reaches 0.5 mm to 1.2 mm, discharging the products; meanwhile, adjusting the feeding speed and the discharging speed to maintain the constant material in the mixer; screening the discharged sodium carbonate products by virtue of screening equipment, wherein the fine sodium percarbonate products with particle size less than 0.5 mm are returned to the mixer as crystal nucleus in a quantitative manner and the middle target materials with particle size within 0.5 mm and 1.2 mm are dried to be finished products. The method for preparing sodium percarbonate is environmentally friendly, small in equipment investment and simple in technology, produces no sewage, and can prepare the high-quality products with high active oxygen, excellent heat stability and excellent humidity stability.

Description

technical field [0001] The invention relates to the field of fine chemicals, in particular to a method for preparing sodium percarbonate, which is environmentally friendly, has no sewage, has small equipment investment, simple process and can prepare high-quality products. Background technique [0002] Sodium percarbonate is also known as sodium percarbonate. Sodium percarbonate is easily soluble in water, releases active oxygen, and has the functions of bleaching, sterilizing, degreasing and washing. It is widely used as an additive for detergents and washing powder, and is also used in daily chemical products such as toothpaste and cosmetics. . As a new type of high-efficiency detergent bleach, it is odorless, non-toxic and non-polluting. Because the active oxygen generated by decomposition in water has a bleaching effect, sodium percarbonate shows a strong decontamination ability. Therefore, compared with traditional phosphorus and boron detergent builders, it not only...

Claims

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Application Information

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IPC IPC(8): C01B15/10
Inventor 章小兵章金龙虞建立魏一帆谢晋
Owner ZHEJIANG JINKE CHEM
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