Application of gas-liquid contact reaction device in fluorinated perfluoropolyether acid

A reaction device, gas-liquid contact technology, applied in chemical methods, chemical instruments and methods, chemical/physical/physical-chemical stationary reactors for reacting liquids and gaseous media, etc., can solve the problem of low fluorination conversion rate, The problem of low utilization rate of fluorinating agent gas can achieve the effect of less by-products, safe and stable reaction, and improved utilization rate

CN106311097BActive Publication Date: 2018-12-14TIANJIN CHANGLU CHEM NEW MATERIAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2018-12-14

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Abstract

The invention belongs to the field of fluorine chemical synthesis and particularly relates to application of a gas-liquid contact reaction device to fluorination of perfluoropolyether acid. The gas-liquid contact reaction device comprises a gas inlet cylinder for containing fluorinating agent gas, a reaction tube filled with filler, a liquid cylinder, a product collecting cylinder and a tail gas treatment device, wherein a liquid outlet connected with the product collecting cylinder and a gas inlet connected with the gas inlet cylinder are formed in the bottom of the reaction tube, a spray head is arranged at the top end of the reaction tube and is connected with the liquid cylinder through a liquid pump, a gas outlet connected with the tail gas treatment device is formed in the top of the reaction tube, and heating strips are arranged on the outer wall of the reaction tube. The gas-liquid contact reaction device is capable of fluorinating the perfluoropolyether acid by fluorine gas effectively.
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Description

technical field

[0001] The invention belongs to the field of fluorine chemical synthesis, and in particular relates to the application of a gas-liquid contact reaction device in fluorinated perfluoropolyether acid. Background technique

[0002] Perfluoropolyether acid and its resin have excellent resistance to extreme high temperature, wide operating temperature range, excellent oxidation resistance and chemical corrosion resistance, wide material compatibility, excellent electrical insulation performance, excellent film formation Excellent load-carrying and lubricating properties, it is widely used in cutting-edge scientific fields such as military industry, aerospace and nuclear industry.

[0003] No matter the preparation of perfluoropolyether acid by anionic polymerization of hexafluoropropylene oxide represented by DuPont, or the preparation of perfluoropolyether acid by photooxidation method represented by Solvay, the end groups of the generated perfluoropolyether acid...

Examples

Embodiment 1

[0037] Fluorinated perfluoropolyether acid comprises the following steps:

[0038] 1) Turn on the power supply connected to the heating belt to heat the reaction tube, and the heating temperature is 60°C;

[0039] 2) Open the air inlet bottle and blow into the air inlet at the bottom of the reaction tube with a fluorine concentration of 20% F2 / N2 from the air inlet at a speed of 2L / min, and simultaneously open the liquid pump to remove the With hexafluorobenzene as the mass fraction of the solvent, the perfluoropolyether acid solution with a weight average molecular weight of 50% and a weight average molecular weight of 8000g / mol is pumped into the shower head to spray the filler in the reaction tube; The gas mole is 20:1 of perfluoropolyether acid for fluorination experiment.

[0040] 3) The product generated after the reaction between the fluorinating agent gas and the perfluoropolyether acid flows into the product collection bottle through the liquid outlet;

[0041] 4) D...