Technology for separating and purifying trifluoroiodomethane

A trifluoroiodomethane and trifluoromethane technology, which is applied in the field of separation, purification and recovery of trifluoroiodomethane and trifluoroiodomethane mixed gas, can solve the problem of high saturated vapor pressure of the gas, and achieve high operating flexibility and low operating cost Low, low residue effect

Active Publication Date: 2017-09-19
泉州宇极新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to fill up the existing separation and purification CF 3 The blank of I overcomes technical problems such as non-condensable gas in the required purified mixed gas, high saturated vapor pressure of gas, and azeotropic combination, and provides a CF with simple and efficient structure and process, and easy process control. 3 I Mixed gas purification device and purification method

Method used

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  • Technology for separating and purifying trifluoroiodomethane
  • Technology for separating and purifying trifluoroiodomethane
  • Technology for separating and purifying trifluoroiodomethane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Will CF 3 I crude product is passed into degassing tower 1 (filler is wire mesh) initial distillation and removes non-condensable gas, the temperature of the tower top circulation cooling liquid of degassing tower 1 is-20 ℃, and tower still temperature is 30 ℃, and the temperature of degassing tower The pressure is 0.1MPa; the CF after removing the non-condensable gas 3 I crude product passes into degassing tower 2 to remove CF 3 H and C 2 f 5 For gases such as H, the temperature of the circulating cooling liquid at the top of the degassing tower 2 (the packing is wire mesh) is -45°C, the temperature of the tower bottom is 60°C, and the pressure of the degassing tower is 0.5MPa. CF after two degassing 3 I crude product is passed into extractive distillation column, and extractant is acetone, carries out extraction rectification according to the process parameter of table 1, and purity is 99.96% CF 3 I monomer is recovered from the top of the tower, and the bottom o...

Embodiment 2

[0039] Will CF 3 I crude product is passed into degassing tower 1 (filler is Raschig ring) initial distillation and removes non-condensable gas, the temperature of the tower top circulation cooling liquid of degassing tower 1 is-30 ℃, and tower still temperature is 40 ℃, and the temperature of degassing tower The pressure is 0.3MPa; the CF after removing the non-condensable gas3 I crude product passes into degassing tower 2 to remove CF 3 H and C 2 f 5 For gases such as H, the temperature of the circulating cooling liquid at the top of the degassing tower 2 (the packing is Raschig rings) is -40°C, the temperature of the bottom of the tower is 70°C, and the pressure of the degassing tower is 0.7MPa. CF after two degassing 3 1 crude product is passed into extractive distillation column, and extractant is methyl acetate, carries out extraction rectification according to the processing parameter of table 2, and purity is 99.99% CF 3 I monomer is recovered from the top of the t...

Embodiment 3

[0043] Will CF 3 I crude product passes into degassing tower 1 (filler is a glass spring) initial distillation removes non-condensable gas, the temperature of the tower top circulation cooling liquid of degassing tower 1 is-40 ℃, and tower still temperature is 65 ℃, and the pressure of degassing tower is 0.8MPa; the CF after removing the non-condensable gas 3 I crude product passes into degassing tower 2 to remove CF 3 H and C 2 f 5 For gases such as H, the temperature of the cooling liquid at the top of the degassing tower 2 (filler is glass spring) is -35°C, the temperature of the bottom of the tower is 55°C, and the pressure of the degassing tower is 0.5MPa. CF after two degassing 3 I crude product passes into extractive rectification column, and extractant is methyl ethyl ketone, carries out extractive rectification according to the process parameter of table 3, and purity is 99.95% CF 3 I monomer is recovered from the top of the tower, and the bottom of the tower is ...

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Abstract

The invention discloses a technology for separating and purifying trifluoroiodomethane. The technology is a method for obtaining a trifluoroiodomethane monomer by separating and purifying a mixed gas product from the gaseous phase preparation of the trifluoroiodomethane by utilizing trifluoromethane. The trifluoroiodomethane is separated and purified in the manner of separating the components in the mixed gas in steps. The system has the characteristics of high recovery rate, excellent separating effect, low cost, and the like. The technology has the characteristics of high recovery rate, high product purity, complete separation and the like in the process of separating and purifying the trifluoroiodomethane; the technological process is simple, the safety factor is high, the operation is easy, and the separating and purifying cost is low; and the technology has the value of industrial production.

Description

technical field [0001] The invention belongs to the field of gas-phase organic synthesis for the separation, purification and collection of gases with high saturated vapor pressure, in particular to a process for the separation, purification and recovery of mixed gases whose main components are trifluoromethane and trifluoroiodomethane. Background technique [0002] Trifluoroiodomethane (CF 3 1), boiling point is-22.5 ℃, critical pressure is 3.95MPa, is colorless and odorless gas under standard atmospheric pressure. CF 3 As a fire extinguishing agent, I has the characteristics of high fire extinguishing efficiency, good safety performance, high economic utility, and no trace after fire extinguishing, and is a preferred substitute for trifluorobromomethane (halon 1301); as a refrigerant, CF 3 I is non-flammable, has the characteristics of good oil solubility and material compatibility, and is considered to be one of the ideal substitutes for traditional Freon refrigerant co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C17/38C07C19/16
CPCC07C17/158C07C17/38C07C19/16
Inventor 胡儒柱庆飞要李忠权恒道
Owner 泉州宇极新材料科技有限公司
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