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Preparation method of specific emulsifier for emulsion explosive

A technology of emulsified explosives and emulsifiers, applied in non-explosive/non-thermal agent components, explosives, organic chemistry, etc., can solve problems such as unstable quality, excessive waste residue, dark color, etc., shorten reaction time, reduce three wastes, reduce The effect of sewage volume

Inactive Publication Date: 2017-07-14
杨桂廷
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The products produced are not only dark in color, with a lot of waste residue (30-40kg), but also unstable in quality

Method used

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  • Preparation method of specific emulsifier for emulsion explosive
  • Preparation method of specific emulsifier for emulsion explosive
  • Preparation method of specific emulsifier for emulsion explosive

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preparation example Construction

[0019] In order to solve the problems of low quality of finished emulsion explosives and many waste residues existing in the prior art. The invention provides a preparation method of a special emulsifier for emulsion explosives, which uses sorbitol as a raw material, carries out dehydration etherification treatment under reduced pressure, then adds oleic acid and esterification catalyst sodium hydroxide at the same time, turns on the vacuum pump and raises the temperature Prepared by esterification reaction.

[0020] Specifically, the above-mentioned preparation method comprises the following steps:

[0021] Step a, etherification reaction

[0022] Sorbitol is dehydrated under reduced pressure and increased temperature for 1 to 3 hours, and the free water is completely removed at 105 to 120°C. The reaction is shown in formula I:

[0023] C 6 h 14 o 6 →C 6 h 12 o 5 +H 2 O--Formula I;

[0024] Step b, esterification reaction

[0025] Add oleic acid, sodium hydroxide a...

Embodiment

[0033] 1. Add 600kg of measured sorbitol into the reaction kettle, stir, heat up, and at the same time turn on the vacuum device, raise the temperature to 110°C, and dehydrate for 2 hours. When it is observed that there is almost no return of condensed water, the dehydration is completed.

[0034] Add 1320kg of oleic acid, 7kg of sodium hydroxide and 28kg of water into the reaction kettle, turn on the vacuum device, and raise the temperature to 200°C. After the temperature is reached, keep it at a constant temperature for 3 hours, and the reaction ends. After cooling the finished product, let it stand for 12 hours, pack it, and remove waste residue. Waste residue 1.5kg. Sampling analysis showed that the acid value was 2.84 mg KOH / g, the saponification value was 152.32 mg KOH / g, and the hydroxyl value was 214.22 mg KOH / g.

[0035] 2. Add 600kg of measured sorbitol into the reaction kettle, stir and heat up, and at the same time turn on the vacuum device, raise the temperature...

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Abstract

The invention provides a preparation method of a specific emulsifier for an emulsion explosive. The preparation method comprises the following steps: with sorbitol as a raw material, performing dehydrating and etherifying treatment on sorbitol at reduced pressure; then adding oleic acid and an esterification catalyst, sodium hydroxide, at the same time; and starting a vacuum pump and heating for esterification reaction to obtain the specific emulsifier. According to the specific emulsifier for the emulsion explosive provided by the invention, the indexes of the emulsifier product meet the national standards in China, and the smaller the acid value is, the better the stability of Span-80 and the stability of a latex matrix generated are. The sorbitol is dehydrated at reduced pressure first, so that the sorbitol is more thoroughly dehydrated, the reaction time can be shortened, and the energy consumption can be reduced; meanwhile, water generated after dehydration can be directly discharged, so that the amount of sewage to be treated later can be reduced; no etherification catalyst, phosphoric acid, is added, so that the amount of waste residues after reaction is reduced; meanwhile, the temperature of the esterification reaction is also reduced.

Description

technical field [0001] The invention relates to the technical field of emulsion explosives, in particular to a preparation method of a special emulsifier for emulsion explosives. Background technique [0002] Emulsion explosives are usually composed of oxidizers (water phase), combustibles (oil phase) and other additives, and are made by emulsification process. Emulsification is to disperse the entire oxidant water phase in the continuous phase - the oil phase to form a water-in-oil emulsion, which is a thermodynamically unstable system. In order to keep the latex stable and store for a long time, it is necessary to add an emulsifier, which can prevent coagulation and reduce interfacial tension, which is essential for a stable emulsified system. Only with an excellent emulsification system can we ensure the excellent detonation performance and storage stability of emulsion explosives. [0003] At present, the most widely used emulsifier in emulsion explosives is Span-80. I...

Claims

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Application Information

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IPC IPC(8): C07D307/20C06B23/00
CPCC07D307/20C06B23/00
Inventor 徐桂苹李丹胡殿贵胡修波宋昕洋张钧博寇瑞林万里海王文娟吕鑫
Owner 杨桂廷