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Method for preparing perfluorohexane surfactant serving as main agent of aqueous film-forming extinguishing agent directly

A foam fire extinguishing agent and surfactant technology, applied in the field of surfactant preparation, can solve the problems of serious environmental pollution, complex process and high cost, and achieve the effects of simple equipment requirements, easy availability of raw materials and short fire control time.

Inactive Publication Date: 2012-06-20
徐衡
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of this process lies in the high purity of the product, but the disadvantages are that the process is more complicated, the cost is high, the yield is low, and the environmental pollution is serious

Method used

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  • Method for preparing perfluorohexane surfactant serving as main agent of aqueous film-forming extinguishing agent directly
  • Method for preparing perfluorohexane surfactant serving as main agent of aqueous film-forming extinguishing agent directly
  • Method for preparing perfluorohexane surfactant serving as main agent of aqueous film-forming extinguishing agent directly

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 3.0 moles of perfluorohexanesulfonyl fluoride and 0.006 moles of aluminum isopropoxide into a 20-liter reaction kettle equipped with a condensing reflux device, and add 3.6 moles of N,N-dimethylpropane in batches under stirring. amine, and slowly increase the temperature, the system temperature does not exceed 70 ℃. After the dropwise addition, react at about 80°C for 2 hours, and cool to room temperature, in which a small amount of hydrogen fluoride gas is introduced into the lye pool from the upper port of the condenser tube for absorption.

[0022] Add the pre-prepared 3.6 mol concentration of 20% sodium chloroacetate aqueous solution into the above system of the reaction kettle, and add water to 10 L, and reflux for 1 hour to obtain a brownish-yellow liquid. Cool to room temperature, wherein a small amount of quaternary ammonium salt by-products are also good surfactants, and the resulting material does not need to be separated, and is designated as sample 1, wh...

Embodiment 2

[0024] As in Example 1, in the ammonolysis reaction, the amount of N,N-dimethylpropylenediamine was 3.9 moles, and the reaction temperature was 100° C., and the reaction was carried out for 3 hours; during the quaternization reaction, the amount of sodium chloroacetate also rose to 3.9 moles, Prepare an aqueous solution with a concentration of 20%, reflux for 2 hours, and designate it as sample 2, and set it aside for use.

Embodiment 3

[0026] As in Example 1, in the ammonolysis reaction, 0.009 moles of aluminum isopropoxide, 3.9 moles of N,N-dimethylpropylenediamine, and a reaction temperature of 110°C for 3 hours; during the quaternization reaction, sodium chloroacetate The dosage is 3.9 mol, and the concentration is 30% aqueous solution, and the reaction is refluxed for 1 hour, which is designated as sample 3 and is ready for use.

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Abstract

The invention discloses a method for preparing a perfluorohexane surfactant serving as a main agent of an aqueous film-forming extinguishing agent directly. The method comprises the following steps of: performing ammonolysis reaction of perfluorohexane sulfuryl fluoride and diamine which serve as raw materials under the action of a catalyst to synthesize an amino sulfonamide compound without separation, and performing quaterisation reaction of the amino sulfonamide compound and chloroacetate to prepare a perfluorohexane betaine amphoteric surfactant which can be used for the aqueous film-forming extinguishing agent directly. The method has the characteristics of simple requirement on equipment, stable and convenient process, low energy consumption and no pollution; and the aqueous film-forming extinguishing agent prepared from the perfluorohexane betaine amphoteric surfactant serving as the main agent is short in fire control time and high in fire extinguishing efficiency, and all indexes reach the national standards of the industry.

Description

technical field [0001] The invention relates to a preparation method of a surfactant, in particular to a preparation method of a perfluorohexane surfactant directly serving as the main agent of an aqueous film-forming foam fire extinguishing agent. Background technique [0002] In this field, the widely used aqueous film-forming foam fire extinguishing agents mainly contain perfluorooctane surfactants, which can be decomposed into perfluorooctane sulfonate (PFOS) or the like, and It is called PFOS-related substances. A large number of investigations and studies have found that PFOS is a kind of environmental pollutants with systemic multi-organ toxicity and strong persistence. It is one of the most difficult to decompose organic pollutants and has the ability of long-distance environmental transmission. For this reason, many large foreign companies have announced to voluntarily give up the production of perfluorooctane sulfonyl chemicals. At the same time, in the tradition...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62D1/02
Inventor 徐衡赵顺平谦谦吴根华刘光祥黄荣谊
Owner 徐衡
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