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Process for preparing monohydrated sodium perborate

An aqueous sodium perborate and sodium perborate technology, which is applied in the field of preparation of sodium perborate monohydrate, can solve the problems of poor appearance and wet stability of sodium perborate monohydrate bulk specific gravity particles, high concentration of hydrogen peroxide, complex production equipment, etc. Achieve the effects of improving the bulk specific gravity range, simplifying the production process, and improving the particle appearance

Inactive Publication Date: 2002-09-18
陶华西
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are two main methods for preparing sodium perborate monohydrate: one is a dry production process, that is, sodium metaborate solution and hydrogen peroxide solution are sprayed on the crystal of sodium perborate monohydrate at the same time, and the water is evaporated to obtain perborate. Sodium, although this method can obtain better product quality, the one, the concentration of required hydrogen peroxide is higher (≥50%), the 2nd, production equipment is comparatively complicated, and equipment investment is big
The other is a wet production process, that is, the hydrogen peroxide solution is added dropwise to the sodium metaborate solution for reaction crystallization, and sodium perborate monohydrate is obtained after drying. This method is affected by the choice of the crystal habit modifier and the dropping method, etc. , so that the produced sodium perborate monohydrate has a lighter specific gravity, poor particle appearance and wet stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Dissolve 1,000 grams of sodium metaborate in 3,000 grams of water, add 1.0 grams of sodium hexametaphosphate after fully dissolving, and take the supernatant for later use.

[0012] Get 1800 grams of 27.5% hydrogen peroxide, add 3.5 grams of sodium polypropionate with a concentration of 30%, stir well and set aside.

[0013] Add the above two solutions dropwise into a reaction kettle with a diameter of 30cm and a height of 10cm with a jacket and a stirrer at the same time, control the flow rate of the sodium metaborate solution and the hydrogen peroxide solution, control the reaction temperature at 30°C, and the reaction time is about 50min , the reaction speed is 70 rpm, after the reaction is completed, after dehydration with a laboratory centrifuge or a suction filter, dry with a laboratory small fluidized bed to obtain sodium perborate monohydrate.

[0014] Its reaction formula is: Example 2:

[0015] Dissolve 1000 grams of sodium metaborate in 2500 gram...

Embodiment 3

[0019] Dissolve 1000 grams of sodium metaborate in 3000 grams of water, add 1.2 grams of sodium pyrophosphate after it is fully dissolved, and take the supernatant after dissolving for later use.

[0020] Take 1800 grams of 27.5% hydrogen peroxide, add 1.5 grams of 30% polypropionic acid and 2.0 grams of polysodium maleate, stir well and set aside.

[0021] The following steps are the same as in Example 1.

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PUM

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Abstract

A process for prepared monohydrated sodium perborate from the solution of sodium metaborate and the solution of H2O2 includes adding phosphate to the solution of sodium metaborate, adding polycarboxylic acid or its salt to the solution of H2O2, dripping them into reactor, reaction to obtain tetrahydrated sodium perborate crystal, and baking. Its advantages are hith improved stack specific weight range and particle appearance, and high wet stability.

Description

technical field [0001] The invention relates to a preparation method of sodium perborate monohydrate, belonging to the technical field of peroxide preparation in inorganic chemistry. Background technique [0002] Sodium perborate monohydrate, the molecular formula is NaBO 3 .H 2 O, white crystalline particles, mainly used in detergents and bleaching agents in washing powder, so that detergents and washing powders have the functions of sterilization and disinfection; it can also be used in the production of toothpaste, as an oxidant, mordant, bleaching and degreasing in the printing and dyeing industry Agents, etc., can also be used as disinfectants, fungicides, etc. in medicine. [0003] There are two main methods for preparing sodium perborate monohydrate: one is a dry production process, that is, sodium metaborate solution and hydrogen peroxide solution are sprayed on the crystal of sodium perborate monohydrate at the same time, and the water is evap...

Claims

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Application Information

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IPC IPC(8): C01B15/12
Inventor 郑龙陶华西
Owner 陶华西
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