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Preparation method of spherical carboxymethyl cellulose barium stephenate based on added seed crystals

A technology of carboxymethyl cellulose and sodium carboxymethyl cellulose, which is applied in the direction of offensive equipment, ignition devices, explosives, etc., can solve the problem of low pass rate and achieve the goal of improving pass rate, shortening induction period, and shortening synthesis time Effect

Active Publication Date: 2019-11-05
CHUANNAN MACHINERY PLANT CHINA ASTRONAUTIC SCI &TECH GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the following problems often exist in the actual compounding process, resulting in a very low pass rate (30%):

Method used

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  • Preparation method of spherical carboxymethyl cellulose barium stephenate based on added seed crystals
  • Preparation method of spherical carboxymethyl cellulose barium stephenate based on added seed crystals
  • Preparation method of spherical carboxymethyl cellulose barium stephenate based on added seed crystals

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Specific steps are as follows:

[0051] (1) Prepare a solution with a mass concentration of 0.5% sodium carboxymethylcellulose (sodium carboxycellulose for short): weigh 10 g of sodium carboxymethylcellulose, add 1990 ml of distilled water, and stir to dissolve the precipitate for more than 8 hours;

[0052] (2) preparation mass concentration is 16% barium acetate solution: take by weighing 586.7g barium acetate, add 3080ml distilled water, stir and dissolve under the situation of heating;

[0053] (3) preparation of 7% magnesium stephenate solution: take by weighing 423g stephenate (assuming that the purity of stephenate is 100%, conversion should be carried out when it is less than 100%), add 5600ml distilled water, stir and dissolve under heating;

[0054] Add (70-80) g magnesium oxide (slightly excessive) into the stephanic acid solution, and stir under heating until the magnesium oxide is added and no longer reacts to generate a stephenic acid magnesium solution; ...

Embodiment 2

[0065] Specific steps are as follows:

[0066] (1) Prepare a solution with a mass concentration of 0.4% sodium carboxymethyl cellulose (abbreviated as sodium carboxycellulose): weigh 8 g sodium carboxycellulose, add 1990 ml of distilled water, and stir to dissolve the precipitate for more than 8 hours;

[0067] (2) preparation mass concentration is 15.5% barium acetate solution: take by weighing 565.0g barium acetate, add 3080ml distilled water, stir and dissolve under the situation of heating;

[0068] (3) preparation of 6.5% magnesium stephenate solution: take by weighing 389g stephenate (assuming that the purity of stephenate is 100%, conversion should be carried out when it is less than 100%), add 5600ml distilled water, stir and dissolve under heating;

[0069] Add (70-80) g magnesium oxide (slightly excessive) into the stephanic acid solution, and stir under heating until the magnesium oxide is added and no longer reacts to generate a stephenic acid magnesium solution; ...

Embodiment 3

[0080] Specific steps are as follows:

[0081] (1) Prepare a solution with a mass concentration of 0.6% sodium carboxymethylcellulose (abbreviated as sodium carboxycellulose): weigh 12 g sodium carboxycellulose, add 1990 ml of distilled water, and stir to dissolve the precipitate for more than 8 hours;

[0082] (2) preparation mass concentration is 16.5% barium acetate solution: take by weighing 608.6g barium acetate, add 3080ml distilled water, stir and dissolve under the situation of heating;

[0083] (3) preparation of 7.5% magnesium stephenate solution: take by weighing 454g stephenate (assuming that the purity of stephenate is 100%, conversion should be carried out when it is less than 100%), add 5600ml distilled water, stir and dissolve under heating;

[0084] Add (70-80) g magnesium oxide (slightly excessive) into the stephanic acid solution, and stir under heating until the magnesium oxide is added and no longer reacts to generate a stephenic acid magnesium solution; ...

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Abstract

The invention relates to a preparation method of spherical carboxymethyl cellulose barium stephenate based on added seed crystals. The method comprises the steps of firstly, preparing a sodium carboxymethyl cellulose solution, a barium acetate solution and a magnesium stephenate solution; then, mixing the sodium carboxymethyl cellulose solution with the magnesium stephenate solution to form a basesolution; adding dilute nitric acid into the base liquid to ensure that the pH value is 3.8-4.6; adding 3 g of the spherical barium carboxylate seed crystals into the base solution; adjusting the combination temperature, starting a barium acetate feeding pump, and dropwise adding a barium acetate solution into the base solution; after stirring and feeding are finished, maintaining the temperature, performing rinsing on a reaction solution, and performing suction filtration and drying on a product obtained after rinsing to obtain the spherical barium carboxylate. The method solves the problemsof poor color and crystal form and low stacking density, improves the production efficiency and reduces the production cost.

Description

technical field [0001] The invention relates to a method for preparing spherical carboxymethyl cellulose barium, in particular to a method for preparing spherical barium carboxymethyl cellulose styphate based on the addition of crystal seeds, and belongs to the technical field of pyrotechnic agent manufacturing. Background technique [0002] Barium carboxymethyl cellulose styphate, referred to as barium carboxymethyl cellulose, has low electrostatic sensitivity and high flame sensitivity. It is widely used as the main charge for igniters because of its good physical and chemical stability and stable combustion and explosion performance. [0003] The preparation of spherical carboxysite barium is at present under the effect of crystal form control agent sodium carboxymethyl cellulose, barium acetate solution is directly added dropwise to magnesium stephenate solution, is 65 ℃ by controlling compounding temperature, and feed rate is 5% (about 50ml / min) and other process parame...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06C9/00C06B43/00
CPCC06B43/00C06C9/00
Inventor 张彩星詹亮夏先友雷波杨梦龙韩东维王苓州
Owner CHUANNAN MACHINERY PLANT CHINA ASTRONAUTIC SCI &TECH GROUP CORP
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