Readily-foaming emulsifying agent

An emulsifier and stabilizer technology, which is applied in the application field of emulsion explosive preparation and mixed explosive technology, can solve the problems of difficult control of sensitization, difficult control of chemical sensitization, influence on yield and quality, etc., so as to achieve stable explosive quality, The effect of controllable explosive density and controllable sensitization time

Inactive Publication Date: 2011-04-13
GUANGDONG HONGDA BLASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chemical sensitization mainly involves the addition of substances that undergo chemical reactions and can generate air bubbles. They are often aqueous solutions and are easy to disperse evenly in the latex matrix. However, the reaction speed and gas production are related to the temperature of the latex matrix and the quality of the latex matrix. Chemical sensitization is environmentally friendly. , and the explosive performance and charge quality are good, the storage period is long, but the aftereffect is serious (the reaction time is long, and the volume of the explosive becomes larger after a few days or during transportation, and leaks out of the package), and it is difficult to control
[0006] Reasons why chemical sensitization is difficult to control 1: Sodium nitrite is generally used for chemical sensitization in the production line of emulsion explosives, and other inorganic acids or ammonium nitrate are added directly to form an aqueous solution, which is stirred evenly with the latex matrix, and the temperature of the latex matrix is ​​generally controlled at 45 ~55°C, and the best reaction temperature of sodium nitrite is 60~65°C. For example, when the temperature of the latex substrate is 45°C, it will take several hours or even longer for the reaction of sodium nitrite to affect the yield and quality.
[0007] The reason why chemical sensitization is difficult to control 2: The reaction of sodium nitrite is carried out under acidic conditions. The latex matrix is ​​composed of oil phase and water phase. Ammonium nitrate in the water phase itself can react with sodium nitrite, and ammonium nitrate is also The catalyst of sodium nitrite, the ammonium nitrate solution in the water phase is coated with the oil phase (emulsification). When the oil film formed is strong, the ammonium nitrate is not exposed, and the reaction is carried out according to the design. When the oil film of the oil phase is thin, it is coated The ammonium nitrate may directly react with sodium nitrite to form large bubbles, escape directly or react too fast due to the high concentration of ammonium nitrate, making the sensitization difficult to control
[0008] The reason why chemical sensitization is difficult to control 3: The sodium nitrite used in the sensitized latex matrix is ​​generally 2 to 3 times the theoretical calculation. The main considerations are the early reaction and uneven stirring, and the excess amount that does not participate in the reaction, which makes chemical sensitization difficult to control. The problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1. Preparation embodiment

[0040]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;

[0041] 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 stirred evenly to make the easy-to-foam emulsifier of the present invention.

Embodiment 2

[0042] Example 2. Preparation Example

[0043] 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;

[0044] 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 easy-foaming emulsifier described in the present invention is made.

Embodiment 3

[0045] Example 3. Preparation Example

[0046] 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;

[0047] 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, the easy-to-foam emulsifier of the present invention is made.

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Abstract

The invention provides a readily-foaming emulsifying agent. The readily-foaming emulsifying agent consists of the following components in percentage by weight: 60 to 40 percent of surfactant and 40 to 60 percent of wetting and stabilizing agent, wherein the surfactant at least comprises S-80 with high hydroxyl value. The main components and compounded products of the emulsifying agent are dissolved into oil easily; and the emulsifying agent is emulsified with aqueous solution of ammonium nitrate inorganic salt to form a latex matrix, and after the latex matrix is added into aqueous solution of sodium nitrite, bubbles are generated to sensitize the latex matrix into emulsion explosive.

Description

technical field [0001] The invention relates to an emulsifier suitable for the sensitization (foaming) of emulsion explosives and its application in the preparation of emulsion explosives and the technology of mixed explosives. Background technique [0002] With the development of industrial explosives, safe and environmentally friendly explosives have taken the dominant position. Emulsion explosives are environmentally friendly, safe, and waterproof. At the same time, it is easy to realize mechanized pharmaceuticals and charging. Increasing year by year, manual charging will be replaced by mechanized and mixed vehicle charging. [0003] After more than 20 years of development, emulsion explosives have developed from a small, scattered, and chaotic production line to a fully automatic intensive production line. Now the production technology of mixed vehicles is popularized. There are some problems in both the production line and the production of mixed vehicles. One is emul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B23/00
Inventor 陈飞郑炳旭李战军郑少旭邢光武
Owner GUANGDONG HONGDA BLASTING
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