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Method and device for preparing octafluoropropane through electrolysis

An octafluoropropane and electrolytic cell technology, which is used in electrolytic components, electrolytic processes, electrolytic organic production, etc., can solve the problems of easy carbon chain breakage and low yield of octafluoropropane, and achieve stable control and easy control.

Pending Publication Date: 2022-02-08
PERIC SPECIAL GASES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has the advantages of simple process and stable anode product composition, but the electrolysis process has the problem that the carbon chain is easily broken, and impurities such as carbon tetrafluoride and hexafluoroethane are easily produced, resulting in a low yield of octafluoropropane.

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  • Method and device for preparing octafluoropropane through electrolysis

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Effect test

Embodiment 1

[0058] An electrolytic method of preparing octafluoropropane, the method steps:

[0059] At (1) 10 ℃, the HF KF and mixed to obtain a molten salt electrolyte.

[0060] (2) the electrolyte into the electrolytic cell, electricity is released water, electrolytic gas venting. Specifically, the first controls the electrolysis voltage is 3V, the electrolytic current trend was observed, when the current drops to zero in a stepwise manner stepwise voltage increase, enhance 0.5V each, until the voltage increased to 5V, the current drops to zero, the electrical lift the water over. In the electrolytic cell the anode and cathode is a porous nickel plate and a pitch of 5mm.

[0061] After completion (3) are electrically released water, the feedstock into the electrolytic cell, the electrolysis voltage is controlled 7V, an electrolysis temperature of -10 deg.] C, when it is detected electrolysis products containing octafluoropropane, electrolysis product was collected to give a crude octafluor...

Embodiment 2

[0067] An electrolytic method of preparing octafluoropropane, the method steps:

[0068] At (1) 10 ℃, the HF and CsF were mixed to obtain a molten salt electrolyte.

[0069] (2) the electrolyte into the electrolytic cell, electricity is released water, electrolytic gas venting. Specifically, the first controls the electrolysis voltage is 3V, the electrolytic current trend was observed, when the current drops to zero in a stepwise manner stepwise voltage increase, enhance 0.5V each, until the voltage increased to 5V, the current drops to zero, the electrical lift the water over. In the electrolytic cell a nickel anode and the cathode is a porous tube and a pitch of 5mm.

[0070] After completion (3) are electrically released water, the feedstock into the electrolytic cell, the electrolysis voltage was 6.5V control, an electrolysis temperature of 20 ℃, when detecting the electrolysis product contains octafluoropropane, electrolysis product was collected to give a crude octafluoropro...

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Abstract

The invention relates to a method for preparing octafluoropropane through electrolysis, and belongs to the technical field of fine chemical engineering. The method comprises the following steps: mixing HF and alkali metal fluoride to obtain a molten salt electrolyte, and adding the molten salt electrolyte into an electrolytic bath for electrolytic water removal; adding the raw materials into an electrolytic bath, controlling the electrolytic voltage to be 4V-10V and the electrolytic temperature to be -10 DEG C to 20 DEG C, and collecting an electrolytic product to obtain an octafluoropropane crude product when the electrolytic product is detected to contain octafluoropropane; cooling the octafluoropropane crude product at the temperature of 70 DEG C below zero to 50 DEG C below zero, and collecting a liquid phase; and finally, heating and gasifying the liquid phase to obtain the octafluoropropane. According to the method, high-yield and high-purity preparation of the octafluoropropane can be realized.

Description

Technical field [0001] The present invention relates to a method and apparatus for electrolytic preparation of octopoxane, belonging to fine chemical technology. Background technique [0002] Octopropane (C 3 Fly 8 ) Widely used in electronics, microelectronics, pharmaceuticals and other industries. At present, the preparation method of octopropane is basically adopted by chemical synthesis, and the main paths are as follows: [0003] 1. Direct fluoride method, main raw materials are hydrocarbons, hexafluoroprofluorne and hydrofluoroalkane; the main reaction is as follows: Fluoroalkane and HF Reaction: CCLF 2 CF 2 CF 3 + HF → C 3 Fly 8 + HCl; propane and f 2 Reaction: c 3 Hide 8 + 8F 2 → C 3 Fly 8 + 8HF; hexafluoropropylene and f 2 Reaction: CF 3 Cf = CF 2 + F 2 → C 3 Fly 8 . Direct fluoride law is difficult to industrialization, main reasons are as follows: (1) hydrocarbons, hexafluoropropene and f 2 The reactance generates the breakage of the CC bond, and a by-product such as a...

Claims

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Application Information

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IPC IPC(8): C25B3/11C25B9/17C25B9/67
CPCC25B3/11C25B9/17C25B9/67C25B3/28C25B9/09Y02P20/10
Inventor 马毅斌徐海云耿谦花莹曦鲁毅赵鹏举倪珊珊
Owner PERIC SPECIAL GASES CO LTD
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