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Method for preparing sodium carbonate by dry method

A technology of sodium percarbonate and dry method, which is applied in chemical instruments and methods, peroxide/peroxyhydrate/peroxyacid/superoxide/ozonide, inorganic chemistry, etc., and can solve the problem of increasing detergent packaging, Transportation costs, increasing sodium percarbonate and other issues

Active Publication Date: 2006-05-03
HUNAN JIEYU DAILY CHEM NEW TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the sodium percarbonate active oxygen of preparation is low, in order to keep the content of active oxygen in the detergent composition, just need to increase the consumption of sodium percarbonate, have increased the packing of detergent like this, transportation cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 3.0kg light sodium carbonate (as Na 2 CO 3 98.8%) was added to the 10L kneader. Take by weighing 2.84kg of hydrogen peroxide aqueous solution (with H 2 o 2 50.2%), adding concentration is 50.3% 1-hydroxyethane-1, 85.2g of 1-disodium diphosphonate solution, stirring is made into uniform hydrogen peroxide mixed solution. Start the stirring blade of the kneader, spray the mixed solution of hydrogen peroxide into the kneader, and the spray time is about 30 minutes in total. The spray speed in the first 15 minutes is 1 / 4 of the spray speed in the next 15 minutes. In order to control the reaction temperature, use tap water to cool the kneader through the jacket, adjust the flow of tap water, and control the reaction temperature to be 65-70°C. After the hydrogen peroxide solution was sprayed, the reaction was continued for 5 minutes, and then the product was taken out from the kneader, and placed in a drying oven with a blower device to dry at 80°C for 90 minutes. Obtain...

Embodiment 2

[0049] 3.0kg heavy sodium carbonate (as Na 2 CO 3 98.9%) was added to the 10L kneader. Weigh 5.14kg of hydrogen peroxide aqueous solution (in H 2 o 2 27.8%), adding concentration is 50.3% 1-hydroxyethane-1, 85.2g of 1-disodium diphosphonate solution, stirring is made into uniform hydrogen peroxide mixed solution. Start the stirring blade of the kneader, spray the mixed solution of hydrogen peroxide into the kneader, and the spray time is about 40 minutes in total. The spray speed in the first 20 minutes is 1 / 10 of the spray speed in the next 20 minutes. In order to control the reaction temperature, the kneader is cooled with refrigerant water at about -10°C through the jacket, and the flow rate of the refrigerant water is adjusted to control the reaction temperature at 0-5°C. After the hydrogen peroxide solution was sprayed, the reaction was continued for 10 minutes, and then the product was taken out from the kneader, and placed in a drying oven with a blower device to d...

Embodiment 3

[0051] 3.0kg light sodium carbonate (as Na 2 CO 3 98.8%) was added to the 10L kneader. Weigh 2.03kg of hydrogen peroxide aqueous solution (in H 2 o 2 70.3%), adding 50.3% 1-hydroxyethane-1, 1-diphosphonic acid disodium solution 85.2g, stirring to form a uniform hydrogen peroxide mixed solution. Start the stirring blade of the kneader, spray the mixed solution of hydrogen peroxide into the kneader, and the spray time is about 30 minutes in total. The spray speed in the first 15 minutes is 1 / 2 of the spray speed in the next 15 minutes. In order to control the reaction temperature, the kneader is cooled with refrigerant water at about -5°C through the jacket, and the flow rate of the refrigerant water is adjusted to control the reaction temperature at 35-40°C. After the hydrogen peroxide solution was sprayed, the reaction was continued for 8 minutes, and then the product was taken out from the kneader, and placed in a drying oven with a blower device to dry at 80°C for 90 mi...

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Abstract

The invention relates to dried prepare sodium percarbonate with active oxygen content at least 10 wt% and prefers to 13.5~15.2 wt%, and belongs to preparation technology field for peroxyacid salt in inorganic chemistry. Wherein, spray the hydrogen dioxide solution with varying speed to soda without water for reaction; drying and granulating the production to obtain the objective production. This invention is simple to control the active oxygen content and density and fit to different market require.

Description

technical field [0001] The invention belongs to the technical field of preparation of peroxy salts in inorganic chemistry, in particular to a method for preparing sodium percarbonate (sodium percarbonate, referred to as PCS) with an active oxygen content of at least 10% by weight, preferably 13.5% by weight to 15.2% by weight method. Background technique [0002] Sodium percarbonate is a white solid formed by sodium carbonate and hydrogen peroxide relying on hydrogen bonds, the total molecular formula is 2Na 2 CO 3 ·3H 2 o 2 , the theoretical active oxygen content is 15.28% (equivalent to 32.49% H 2 o 2 ). Sodium percarbonate releases a large amount of active oxygen after dissolving in water, which has strong functions of stain removal, whitening and sterilization. It is characterized by good water solubility, and its decomposition products will not increase the environmental load. It can be used alone as a laundry bleach and household stain remover, as a bleaching a...

Claims

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Application Information

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IPC IPC(8): C01B15/10
Inventor 谭本祝钟存仁
Owner HUNAN JIEYU DAILY CHEM NEW TECH
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