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Method for preparing peroxidating urea

A technology of urea peroxide and urea, which is applied in the direction of organic chemistry, can solve the problems of insufficient product stability, complex production process, and low yield, and achieve the effect of adapting to large-scale industrial production and simple production process

Inactive Publication Date: 2007-02-21
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production process is complicated, the process is long, and it is required to be carried out at low temperature, and the yield is low
Moreover, the product stability is not high enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The preparation of embodiment 1 stabilizer

[0017] Put 8g of zinc oxide, 15g of tartaric acid and 200ml of distilled water into a 400ml beaker, heat to 100°C, react for several hours until the solution is clear, cool naturally, and crystallize. Filter, wash with distilled water several times, and dry in an oven at 60°C for 1.5 to 2.0 hours to obtain zinc tartrate. Get 1g zinc tartrate, 49g tartaric acid, 50g sodium dodecylbenzenesulfonate mix, obtain 100g described stabilizing agent.

Embodiment 2

[0019] Add 13.00ml of 27.5% H in a 100ml beaker 2 o 2 , 6.00g industrial grade urea, stirred by electromagnetic for 5min to fully dissolve the urea, pour it into a 50ml petri dish after mixing, put it into an oven, and dry it at 40°C for 105min to obtain white crystals. The yield of the obtained product is greater than 99.50%, and the content is 89.69% %.

[0020] Reaction equation:

[0021]

Embodiment 3

[0023] Add 13ml of 27.5% H in a 100ml beaker 2 o 2 , 0.20 mg of the stabilizer prepared in Example 1, 6.00 g of industrial-grade urea, and electromagnetically stirred for 5 minutes to fully dissolve and mix the urea, then pour it into a 50 ml petri dish, put it into an oven, and react and dry at 40°C for 105 minutes to obtain a white Snowflake-like crystals, the yield of the obtained product is greater than 99.76%, and the content is 99.69%.

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PUM

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Abstract

This invention relates to a method for preparing high-stability carbamide peroxide. The method comprises: (1) adding urea and stabilizer into 25-40 wt. % H2O2; (2) stirring so that urea is completely dissolved, and drying to obtain carbamide peroxide crystals. The stabilizer is a mixture of zinc tartrate, tartaric acid and dodecyl benzenesulfonate at a weight ratio of (1-2) : (45-49): (45-50). The mol ratio of urea to H2O2 is 1: (1.0-1.2). The method has such advantages as high yield, simple process, no wastes and high product stability, and is suitable for mass production.

Description

(1) Technical field [0001] The invention relates to a preparation method of urea peroxide, in particular to a preparation method of high-stable urea peroxide. (2) Background technology [0002] Urea peroxide, also known as urea hydrogen peroxide, carbamide peroxide, percarbamide, urea hydrogen peroxide, etc., is white powder, flaky or granular crystal, non-toxic and tasteless. It is obtained by the reaction of hydrogen peroxide and urea, and its molecular formula is CO(NH 2 ) 2 ·H 2 o 2 , the active oxygen content is 17.02%, soluble in water, also soluble in ether, acetone, glycerin and other solvents, urea peroxide is a heat-sensitive substance with poor thermal stability. Some metal ions will be decomposed by light or heat, thereby reducing the concentration of active oxygen. [0003] Urea peroxide is a new type of fine chemical product, and it is also an efficient, safe, and easy-to-use solid disinfectant, oxygenator and bleach. At the same time, it can also nourish...

Claims

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Application Information

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IPC IPC(8): C07C409/40C07C409/00
Inventor 朱小红范永仙
Owner ZHEJIANG UNIV OF TECH
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