Organic matter fluorination gas-liquid reaction system

Abstract

The invention relates to an organic matter fluorination gas-liquid reaction system. An organic matter raw material liquid storage tank communicates with a liquid inlet in the top of a reaction tower through a liquid inlet pipe provided with a first liquid inlet pump, and a liquid outlet in the bottom of the reaction tower communicates with the liquid inlet in the top of the reaction tower through a circulating pipeline provided with a reaction liquid circulating pump; and the circulating pipeline further communicates with a crude product discharging pipe with a valve, a gas inlet in the bottom of the reaction tower communicates with a constant-temperature mixing tank through a gas inlet pipeline provided with a gas inlet pump, an anhydrous hydrogen fluoride storage tank communicates with the constant-temperature mixing tank through a feeding pipeline provided with a second liquid inlet pump, and the nitrogen storage tank communicates with the constant-temperature mixing tank through a gas feeding pipeline. The system has the advantages that the HF gas is subjected to gas-liquid contact reaction fluorination in the reaction tower after being diluted, the reaction is relatively warm, the controllability is good, the problem that the substitution positions and structures of products such as multi-substitution fluorination and many by-products are difficult to control due to high concentration and easy local excess of the fluorinating agent can be effectively avoided, and the potential safety hazard caused by heat release due to severe reaction is reduced.

Description

technical field [0001] The invention belongs to the technical field of production and preparation of fluorinated organic matter, and in particular relates to a gas-liquid reaction system for fluorinated organic matter. Background technique [0002] The fluorination of organic compounds usually has the following methods: ①Selective fluorination. Using alkali metal fluoride or antimony, mercury, silver fluoride, can convert haloalkane or sulfonate into fluoroalkane, the reaction is generally carried out in anhydrous polar medium; antimony pentachloride can also be used as catalyst, Fluorination was carried out in anhydrous hydrogen fluoride. Sulfur tetrafluoride can be used as a specific reagent for converting hydroxyl, carbonyl and carboxyl into monofluoroalkyl, difluoromethine and trifluoromethyl respectively, and catalysts such as hydrogen fluoride and boron trifluoride can be added if necessary. ② perfluorinated. Elemental fluorine saturates multiple bonds in organic co...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a gas-liquid production system for fluorination of organic matter, aiming at overcoming the shortage of an effective gas-liquid fluorination production system for organic matter in the prior art

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