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Emulsion explosive and preparation method thereof

A technology of emulsified explosives and emulsifiers, which is applied in the field of explosives and can solve problems such as large bubbles, affecting the storage quality of explosives, and weak oil film sensitivity

Inactive Publication Date: 2011-09-07
GUANGDONG HONGDA BLASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The brief description of chemical sensitization is very simple, but the actual operation is very complicated and subject to many influences and constraints
[0009] Affected by the formulation and manufacturing process: the strength of the oil film formed by the oil phase in the formulation, the amount of catalyst, the pH value in the internal phase, and the amount of foaming will all play a role in the sensitization time, the size of the bubbles, and the final comprehensive formation of the performance of the emulsion explosive. The strength of the oil film is moderate, and the sensitization is relatively easy. If the oil film is too strong, the stirring time will be prolonged. If the oil film is too weak, the sensitization will be too fast, and the bubbles will be too large, which will affect the storage quality of explosives.

Method used

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  • Emulsion explosive and preparation method thereof
  • Emulsion explosive and preparation method thereof
  • Emulsion explosive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] Embodiment 1. Preparation of emulsifier I

[0094] a) Put 700g of oleic acid and 390g of 70% sorbitol into 1# reactor, start the stirrer, add 0.1% of KOH accounting for the total weight of the reaction mixture, vacuum 0.05-0.1MPa, and heat to 200-220°C Afterwards, react for 3 hours, take a sample test, then continue to heat up to 250°C, extend the reaction time to 7 hours, and take a sample test to obtain an S-80 of 240-270;

[0095] b) 30g of S-80 obtained in step a) and 5g of 2000 molecular weight polyisobutene, 10g of polyisobutylene succinimide, 10g of sorbitan monooleate, 15g of polyglycerol fatty acid ester, 30g of lecithin phases are mixed and then stirred evenly to prepare the emulsifier I used in the emulsion explosive of the present invention.

Embodiment 2

[0096] Embodiment 2. Preparation of emulsifier II

[0097] a) Put 700g of oleic acid and 370g of 70% sorbitol into 1# reactor, start the stirrer, add 0.15% of KOH accounting for the total weight of the reaction mixture, vacuum 0.05-0.1MPa, and heat to 230-240°C Afterwards, react for 5 hours, take a sampling test, then continue to heat up to 250°C, prolong the reaction time to 6 hours, and take a sampling test to obtain S-80 with a hydroxyl value of 230-250;

[0098] b) 50g of S-80 prepared by step a) is mixed with 5g of polyisobutylene with a molecular weight of 2000, 10g of polyisobutylene succinimide, 15g of liquid paraffin, and 20g of n-butyl acrylate and stir evenly, namely The emulsifier II used to make the emulsion explosive of the present invention.

Embodiment 3

[0099] Embodiment 3. Preparation of emulsifier III

[0100] a) Add 700 g of oleic acid and 390 g of 70% sorbitol into the reaction kettle, start the stirrer, add KOH accounting for 0.15% of the total weight of the reaction mixture, vacuumize 0.05-0.1 MPa, and heat to 210-220 ° C, React for 4 hours, take a sample test, then continue to heat up to 250°C, prolong the reaction time to 7 hours, and take a sample test to obtain S-80 with a hydroxyl value of 240-260;

[0101] b) Mix 30g of S-80 prepared in step a) with 20g of anhydrous xylitol monooleate (M201), 40g of xanthan gum, and 10g of polyisobutylene bis-succinimide (T154) and stir Uniform, that is, to make the emulsifier III used in the emulsion explosive of the present invention.

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Abstract

The invention relates to an emulsion explosive which is formed by mixing a latex substrate and a sensitizing agent in a weight ratio of (95-97): (3-5) and sensitizing, wherein the latex substrate is formed by emulsifying 90-95 wt% of oil phase and 5-10 wt% of water phase; and the oil phase is prepared from 28-40 wt% of emulsifier and 60-72 wt% of oil phase material, wherein the emulsifier consists of 40-60 wt% of surfactant and 40-60 wt% of wetting and stabilizing agent, and the surfactant contains high hydroxyl S-80 which is prepared by a method comprising the following steps of: mixing oleic acid with sorbierite in an equivalent molar ratio, adding KOH the weight of which accounts for 0.1-0.15% of the total weight of reaction mixture, and effectively reacting for 3-7 hours at the temperature of 200-250 DEG C and the negative pressure of 0.05-0.1MPa. The emulsion explosive disclosed by the invention has a sensitization effect superior to emulsion explosive obtained by using the prior art. The invention further provides a preparation method of the emulsion explosive.

Description

technical field [0001] The invention relates to an explosive, in particular to an emulsion explosive in the field of industrial explosives, and a preparation method thereof. Background technique [0002] After entering the 21st century, industrial explosives in China's civil explosive industry have made considerable progress in all aspects. Industrial explosives are mainly environmentally friendly and safe emulsion explosives. Explosive manufacturing and application technology is constantly developing. [0003] Emulsion explosives were dominated by the intermittent production line at that time, which was also synonymous with small, scattered, and chaotic, and developed into today's fully automatic intensive production line. Now the country is gradually popularizing emulsion explosives and emulsion explosives mixed trucks, but there are still many in the development. Technical problems, some of which have existed for quite a long time. One is the safety problems caused by va...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B23/00C06B31/28
Inventor 陈飞郑炳旭邢光武李战军王晓帆
Owner GUANGDONG HONGDA BLASTING
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