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Preparation method of emulsifier for emulsion explosive

An emulsifier and catalyst technology, applied in non-explosive/non-thermal agent components, explosives, organic chemistry, etc., can solve the problems of many by-products, aging production equipment, low production efficiency, etc., and achieve low shear and high dispersion Effect

Inactive Publication Date: 2019-01-18
雅化集团雅安实业有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The emulsifier Span-80 produced by the traditional one-step or two-step method cannot be used alone in emulsion explosives. The most fundamental reason is that the production process is backward, the production equipment is aging, the heating rate of the production process is not easy to control, the production efficiency is low, and the by-products More, the product performance index fluctuates greatly, and the separation of impurities in the finished product is difficult, resulting in insufficient effective use in the production process of emulsion explosives and poor storage performance.

Method used

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

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preparation example Construction

[0022] In order to provide a kind of emulsifier suitable for emulsified explosives, the present invention provides a kind of preparation method of emulsifier, the emulsifier prepared by the application is essentially a kind of Span-80 emulsifier, which has easy emulsification, low shear, The characteristics of high dispersibility and good safety, specifically, the preparation method of the emulsifier for emulsified explosives of the present invention comprises the following steps:

[0023] A) the sorbitol liquid is concentrated;

[0024] B) carry out etherification reaction with concentrated sorbitol liquid and acid promoter under negative pressure condition;

[0025] C) performing an esterification reaction on the product of the etherification reaction, oleic acid and a catalyst under negative pressure conditions to obtain an emulsifier.

[0026] In the process of preparing the emulsifier above, the raw materials used in the present application specifically include sorbitol ...

Embodiment 1

[0032] according to figure 1 Process for preparing emulsifiers Prepare emulsifiers; first, 310 g of 68% (weight) sorbitol solution is added to the reactor, fully stirred, and the temperature is raised in vacuum to 100 ± 20 ° C, and the vacuum degree reaches 0.70MP a 1.3g of phosphorous acid and hypophosphorous acid (each accounting for 50%) were added, and the temperature was raised to 180°C in vacuum for 100 minutes, and the vacuum degree reached 0.82MPa. Then, 510g of oleic acid and 5g of sodium hydroxide were added, and the temperature was raised to 202°C in a vacuum gradient for timing reaction. After 3 hours, the reaction was completed and the temperature was lowered under negative pressure to stand still to obtain the viscous emulsifier Span-80. The kinematic viscosity of the emulsifier prepared in this example at 100°C: (46-55) mm 2 / s, acid value mgKOH / g: 2.6, saponification value mgKOH / g: 140.2, hydroxyl value mgKOH / g: 255.

Embodiment 2

[0034] according tofigure 1 Process for preparing emulsifiers Prepare emulsifiers; first, add 320 g of 70% (weight) sorbitol solution into the reactor, stir thoroughly, and raise the temperature in vacuum to 100±20°C, and the vacuum degree reaches 0.70MP a 1.2g of phosphorous acid was added, the temperature was raised to 180°C in vacuum for 120 minutes, and the vacuum degree reached 0.85MPa, then 510g of oleic acid and 5g of sodium hydroxide were added, and the vacuum gradient was raised to 205°C to react for 5 hours. Instant viscous emulsifier Span-80. The kinematic viscosity of the emulsifier prepared in this example at 100°C: (46-55) mm 2 / s, acid value mgKOH / g: 2.2, saponification value mgKOH / g: 142, hydroxyl value mgKOH / g: 265.

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Abstract

The invention provides a preparation method of an emulsifier for an emulsion explosive. The preparation method comprises the following steps that (A) sorbitol liquid is concentrated; (B) the concentrated sorbitol liquid and an acidic catalysis boosting agent are subjected to an etherification reaction under the negative pressure condition; and (C) products of the etherification reaction, oleic acid and a catalyst are subjected to an esterification reaction under the negative pressure condition, and thus the emulsifier is obtained. In the preparation process of the emulsifier, the sorbitol liquid and the plant oleic acid are used as raw materials, and the emulsifier Span-80 is synthesized by three steps under the negative pressure condition. The produced emulsifier is stable in quality andlight in color and can be used as an emulsifier alone to be suitable for production of the low-shear static emulsion explosive, and thus the prepared emulsion explosive is stable in storage and excellent in explosion performance.

Description

technical field [0001] The invention relates to the technical field of emulsifier synthesis, in particular to a method for preparing an emulsifier used for emulsion explosives. Background technique [0002] Emulsion explosive is a new type of water-containing industrial explosive developed in the late 1960s. It is a water-in-oil type water-resistant industrial explosive prepared by emulsification technology, which uses an aqueous solution of oxidizer as the dispersed phase and hydrocarbon fuel as the continuous phase. Emulsion explosives have a water-oil two-phase volume ratio of more than 90%. It is a highly dispersed system with high interfacial energy. Droplets tend to coalesce spontaneously to reduce interfacial free energy. Therefore, the raw materials, formula, Various factors such as emulsifier and manufacturing process directly affect its explosive performance and storage period, among which the quality of emulsifier is one of the important influencing factors. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D307/20C06B23/00
CPCC06B23/009C07D307/20
Inventor 李权威李志金周晓琼谢兴伟唐文金李小净代应全
Owner 雅化集团雅安实业有限公司