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A method for synthesizing fire extinguishing agent octafluorocyclobutane

A technology for octafluorocyclobutane and fire extinguishing agent, which is applied in the field of organic chemical synthesis, can solve the problems of restricting the industrialized production of octafluorocyclobutane, restricting industrial production, difficult preparation of raw materials, etc., and achieves less industrial three wastes, cheap raw materials, and synthetic The effect of process safety

Active Publication Date: 2020-12-01
天津航大翼安科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The raw materials of this method are expensive, which limits its industrial production
[0004] As can be seen from the above, when preparing octafluorocyclobutane, there are harsh reaction conditions and disadvantages such as difficult preparation of raw materials, which limit the industrial production of octafluorocyclobutane

Method used

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  • A method for synthesizing fire extinguishing agent octafluorocyclobutane

Examples

Experimental program
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Effect test

Embodiment 1

[0019] (1) Preparation of fluorination catalyst: adopt co-precipitation method, the steps are as follows: CrCl 3 , In(NO 3 ) 3 , Zn(NO 3 ) 2 The solution is mixed into a mixed solution at a molar ratio of 90:5:5, then ammonia water accounting for 30% by weight of the mixed solution is added dropwise to the above mixed solution, the pH value of the mixed solution is adjusted to 9.0, and after 24 hours of precipitation aging, the precipitation filtering, washing with deionized water, drying, and pressing to obtain a Cr-In-Zn catalyst.

[0020] The drying process of Cr-In-Zn catalyst: 20ml Cr-In-Zn catalyst is loaded into the fixed-bed reactor, and then the fixed-bed reactor is heated with an open tube heating furnace. Under the protection of 50m / minl nitrogen, the Cr-In-Zn catalyst is first raised to 400°C at a rate of 10°C / min and dried for 10 hours, and then the temperature is lowered to 200°C, thus completing the Cr-In-Zn catalyst drying process.

[0021] Activation pro...

Embodiment 2

[0024] (1) Preparation of fluorination catalyst: adopt co-precipitation method, the steps are as follows: CrCl 3 , Co(NO 3 ) 2 , Mg(NO 3 ) 2 The solution is mixed into a mixed solution at a molar ratio of 90:5:5, then ammonia water accounting for 30% by weight of the mixed solution is added dropwise to the above mixed solution, the pH value of the mixed solution is adjusted to 9.0, and after 24 hours of precipitation aging, the precipitation filtering, washing with deionized water, drying, and pressing to obtain a Cr-Co-Mg catalyst.

[0025] The drying process of the Cr-Co-Mg catalyst: 20ml of Cr-Co-Mg catalyst was loaded into the fixed-bed reactor, and then the fixed-bed reactor was heated with an open tube heating furnace. Under the protection of 50m / minl nitrogen, the Cr-Co-Mg catalyst is first raised to 400°C at a rate of 10°C / min and dried for 10 hours, and then the temperature is lowered to 200°C to complete the Cr-Co-Mg catalyst drying process.

[0026] Activation...

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Abstract

The invention relates to a method for synthesizing a fire extinguishing agent octafluorocyclobutane, and belongs to the field of organic chemical synthesis. The method for synthesizing octafluorocyclobutane is characterized in that the octafluorocyclobutane is generated from dichlorotetrafluorocyclobutene, hydrogen fluoride and chlorine gas in the presence of a fluorination catalyst. FORMULA is shown in the description. According to the method, raw materials are cheap, the raw material source is convenient, product separating and purifying is simple, industrial production is easy, and a littlethree industrial wastes (waste solid, waste water and waste gas) is generated.

Description

technical field [0001] The invention belongs to the technical field of organic chemical synthesis, in particular to a method for synthesizing a fire extinguishing agent octafluorocyclobutane. Background technique [0002] Octafluorocyclobutane has high industrial value and is a very important fluorine-containing fire extinguishing agent. [0003] There are few reports on the synthesis of octafluorocyclobutane. A method for synthesizing octafluorocyclobutane is reported in the patent (US 6710215), which synthesizes octafluorocyclobutane by tetrafluoroethylene and water under high temperature and high pressure conditions. However, the high temperature and high pressure conditions of this method limit its industrial production. A method for synthesizing octafluorocyclobutane is reported in the patent (US2404374), which synthesizes octafluorocyclobutane by treating tetrafluoroethylene at high temperature and pressure. However, the disadvantages of this method are that the raw...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C17/21C07C17/04C07C23/06B01J23/26B01J23/86B01J37/03B01J37/08
CPCB01J23/26B01J23/864B01J37/031B01J37/082C07C17/04C07C17/21C07C23/06
Inventor 周晓猛周彪赵洪海张青松
Owner 天津航大翼安科技发展有限公司
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