Device for high-temperature chlorination dehydrogenating of alkane gases and use method

A technology for high-temperature chlorination and alkanes, which is applied in the field of high-temperature chlorination and dehydrogenation of alkane gases. It can solve the problems of poor mass and heat transfer effects and unstable yields, and achieve improved mass transfer performance and improved heat transfer. performance, effect of increasing concentration

Active Publication Date: 2019-08-20
ZHONGKE YIGONG XIAMEN CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention mainly aims at the technical defects of the patents of application number 201510777040.1 and application number 201510630923.X, and provides a device and method for high-temperature chlorination and dehydrogenation of alkane gases. The salt layer, preferably, a gas-liquid separation layer is provided on the molten salt layer, and the molten salt is used as the reaction medium to realize the indirect chlorination reaction of chlorine gas and alkane gas, so as to solve the problem of poor mass transfer and heat transfer effect during the high-temperature gas reaction process, and Rate instability and other issues

Method used

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  • Device for high-temperature chlorination dehydrogenating of alkane gases and use method
  • Device for high-temperature chlorination dehydrogenating of alkane gases and use method
  • Device for high-temperature chlorination dehydrogenating of alkane gases and use method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] (1) Cl 2 The chlorine gas inlet of the low-melting-point molten metal layer at the bottom of the tower is passed into the metal Pb molten layer, and the temperature of the low-melting-point molten metal layer is controlled to be 950°C, so that Cl 2 React with metal Pb to get PbCl 2 steam, PbCl 2 The steam enters the chloride molten salt layer composed of CuCl-KCl (the molar ratio of CuCl to KCl is 1:1);

[0075] (2) CH 4 The gas is passed into the dissolved PbCl from the alkane gas inlet of the molten salt layer 2 Molten salt layer composed of steam CuCl-KCl, controlling CH 4 With step 1) the Cl that passes into 2 The molar ratio is 5:1, the temperature of the molten salt layer is controlled at 950°C, so that CH 4 with PbCl 2 Chloride dehydrogenation coupling to get the crude product gas, PbCl 2 Reduced to liquid Pb back to the metal melt layer, and continue with Cl 2reaction.

[0076] (3) control the temperature of the top gas-liquid separation layer cooling ...

Embodiment 2

[0080] (1) Cl 2 The chlorine gas inlet of the low-melting-point metal melt layer at the bottom of the tower is passed into the metal Sn melt layer, and the temperature of the low-melting-point metal melt layer is controlled to be 870°C, so that Cl 2 React with metal Sn to get SnCl 2 Steam, SnCl 2 Steam enters with CuCl-CsCl-CaCl 2 (CuCl, CsCl and CaCl 2 A chloride molten salt layer composed of a molar ratio of 1:0.1:0.1);

[0081] (2) CH 4 The gas is passed into the dissolved SnCl from the alkane gas inlet of the molten salt layer 2 Vapor CuCl-CsCl-CaCl 2 Composition of the molten salt layer that controls the CH 4 With step 1) the Cl that passes into 2 The molar ratio is 10:1, the temperature of the molten salt layer is controlled at 850°C, so that CH 4 with SnCl 2 Chlorination dehydrogenation coupling to get the crude product gas, SnCl 2 Reducted into liquid Sn and returned to the molten metal layer, and continued with Cl 2 reaction.

[0082] (3) Control the temp...

Embodiment 3

[0086] (1) Cl 2 Lead into the metal Bi melt layer from the chlorine gas inlet of the low melting point metal melt layer at the bottom of the tower, and control the temperature of the low melting point metal melt layer to be 700 ° C, so that Cl 2 React with metal Bi to get BiCl 3 steam, BiCl 3 Steam enters with KCl-ZnCl 2 (KCl and ZnCl 2 A chloride molten salt layer composed of a molar ratio of 1:0.5);

[0087] (2) CH 4 The gas is passed into the dissolved BiCl from the alkane gas inlet of the molten salt layer 3 Vapor KCl-ZnCl 2 Composition of the molten salt layer that controls the CH 4 With step 1) the Cl that passes into 2 The molar ratio is 1:1, and the temperature of the molten salt layer is controlled at 700°C so that CH 4 with BiCl 3 Chlorination dehydrogenation coupling to get the crude product gas, BiCl 3 Restore to liquid Bi and return to the metal melt layer, and continue to work with Cl 2 reaction.

[0088] (3) Control the temperature of the gas-liquid...

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Abstract

The invention relates to a device for high-temperature chlorination dehydrogenating of alkane gases and a use method. The device comprises a device body with a reaction chamber, wherein a low-melting-point metal melt layer and a melt salt layer are arranged in the reaction chamber of the device body, and the melt salt layer is arranged on the low-melting-point metal melt layer. According to the device and the method, a salt melt in the melt salt layer is introduced as a reaction solvent and has heat capacity greater than that of gas, so that heat generated from a reaction between chlorine gasand low-melting-point metal can be effectively and continuously supplied to a chlorination dehydrogenating reaction between low-boiling-point metal chloride steam and the alkane gases, the mass transfer and heat transfer performance of a reaction system is improved, and thus, the device and the method are more energy-saving and controllable and are higher in product selectivity.

Description

technical field [0001] The invention belongs to the field of chemical production, and relates to a high-temperature chlorination device and application thereof, and more specifically relates to a high-temperature chlorination dehydrogenation device and a use method of alkane gas. Background technique [0002] Chlorination is a very common type of chemical reaction in organic compounds. Chlorination mainly refers to the reaction of introducing chlorine atoms into the molecules of compounds. Chlorine gas is a common chlorinating agent. However, due to the very active chemical properties of chlorine, if it is directly chlorinated, the chlorination process is not easy to control, there are many side reactions, the selectivity of the product is poor, and the separation and purification are difficult, especially the reaction between chlorine and alkanes, and various chlorinated alkanes are obtained. A mixture of isomers whose boiling points are so close together that they cannot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/02C07C2/76C07C11/04C07C11/24C07C9/06C07C5/44
CPCB01J8/0242C07C2/76C07C5/44C07C11/04C07C11/24C07C9/06
Inventor 钟劲光刘星
Owner ZHONGKE YIGONG XIAMEN CHEM TECH
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