Preparation device and preparation method for 2,3,3,3-tetrafluoropropene

A tetrafluoropropene, liquid-phase reaction technology, applied in the field of fluorine chemical industry, can solve the problems of many reaction steps, redundant separation equipment, short catalyst life, etc., and achieves the effects of short process flow, simplified process flow and simple structure

Active Publication Date: 2019-02-26
SHANDONG HUAAN NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome technical defects such as many reaction steps in the prior art, complicated separation equipment, and short catalyst life, the present invention provides a Propylene and HF are used as raw materials, and the preparation method of 2,3,3,3-tetrafluoropropene is produced by a one-step liquid phase method with a high contact rate with a catalyst

Method used

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  • Preparation device and preparation method for 2,3,3,3-tetrafluoropropene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 1,1,2,3-Tetrachloropropene and hydrogen fluoride pass through the feed pump, and after being preheated by the preheater according to the ratio (3:1), they are injected into the liquid phase reaction kettle loaded with catalyst (catalyst accounts for 10% of the volume of the kettle) 0.3, the catalyst is tin chloride: tin fluoride: antimony chloride = 1:5:4); the temperature of the reactor is 80°C, the pressure is 0.9MPa; the reflux ratio at the top of the tower is controlled at 5:1, the reflux is 2h, and the reflux tank at the top of the tower is detected Inner material composition;

[0047] The composition of the material in the top reflux tank was analyzed by sampling, as shown in Table 1-1.

[0048] The HFO-1234yf crude product is washed with alkali, degassed (the pressure of the tower bottom is 0.5Mpa, the temperature of the tower bottom is 20°C), and rectified (the pressure of the top of the tower is 0.2Mpa, the temperature of the top of the tower is 10°C), and the ...

Embodiment 2

[0055] 1,1,2,3-Tetrachloropropene and hydrogen fluoride pass through the feed pump, and after being preheated by the preheater according to the ratio (3:1), they are injected into the liquid phase reaction kettle loaded with catalyst (catalyst accounts for 10% of the volume of the kettle) 0.5, tin chloride: tin fluoride: antimony chloride = 1:5:4); the temperature of the reactor is 90°C, the pressure is 0.9MPa; the reflux ratio is controlled at the top of the tower at 10:1, and the reflux is 1h, and the material in the reflux tank at the top of the tower is detected composition;

[0056] Analyze the composition of the material in the top reflux tank by sampling, as shown in Table 2-1.

[0057] The HFO-1234yf crude product is washed with alkali, degassed (the pressure of the tower bottom is 0.7Mpa, the temperature of the tower bottom is 25°C), and rectified (the pressure of the top of the tower is 0.3Mpa, the temperature of the top of the tower is 15°C), and the HFO-1234yf prod...

Embodiment 3

[0064] 1,1,2,3-Tetrachloropropene and hydrogen fluoride pass through the feed pump, and after being preheated by the preheater according to the ratio (3:1), they are injected into the liquid phase reaction kettle loaded with catalyst (catalyst accounts for 10% of the volume of the kettle) 0.6, tin chloride: tin fluoride: antimony chloride = 1:5:4)); the temperature of the reactor is 90°C, the pressure is 0.9MPa; material composition;

[0065] Analyze the composition of the material in the top reflux tank by sampling, as shown in Table 3-1.

[0066] The HFO-1234yf crude product is washed with alkali, degassed (tower pressure 0.9Mpa, tower temperature 30°C), and rectified (tower pressure 0.5Mpa, tower top temperature 20°C) to obtain HFO-1234yf product, which is analyzed and tested.

[0067] The composition of the overhead material in the rectification tower was analyzed by sampling, as shown in Table 3-2.

[0068] Table 3-1: Composition of materials in the top reflux tank of E...

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Abstract

The invention relates to a preparation device and a preparation method for 2,3,3,3-tetrafluoropropene and belongs to the technical field of fluorochemical industry. The preparation device for 2,3,3,3-tetrafluoropropene is simple in structure, easy to operate, low in energy consumption and suitable for industrial production. According to the preparation method for 2,3,3,3-tetrafluoropropene, 1,1,1,2,3-pentachloropropane or 1,1,2,3-tetrachloropropene and hydrogen fluoride are taken as raw materials, any one or a combination of tin tetrachloride, stannous fluoride, antimony chloride, titanium tetrachloride, titanium fluoride, aluminium chloride and aluminum fluoride is taken as a catalyst, and 2,3,3,3-tetrafluoropropene is synthesized with a one-step liquid phase method with high catalyst contact rate. The process is simple, and the technological flow is simplified greatly; equipment investment is reduced remarkably due to less equipment, and 99.9% 2,3,3,3-tetrafluoropropene can be obtained. The product selectivity is high, reaction is completed by one step, the flow is short, the conversion rate is high, few byproducts are produced, and energy consumption is low.

Description

technical field [0001] The present invention relates to a preparation device and method for 2,3,3,3-tetrafluoropropene, in particular to a method using 1,1,1,2,3-pentachloropropane or 1,1,2,3- The invention discloses a preparation device and a preparation method for preparing 2,3,3,3-tetrafluoropropene by a one-step liquid phase method of tetrachloropropene, belonging to the technical field of fluorine chemical industry. Background technique [0002] 2,3,3,3-Tetrafluoropropene (HFO-1234yf) has an ODP of 0 and a GWP of 4. As a single refrigerant, it has excellent environmental parameters. The life-cycle climate performance (LCCP) is lower than that of 1,1,1,2-tetrafluoroethane (HFC-134a), the atmospheric decomposition products are the same as HFC-134a, and the system performance is better than HFC-134a, which is the most potential alternative Alternatives to HFC-134a. It is widely used in refrigerants, fire extinguishing agents, propellants, foaming agents, polymer monomers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C17/25C07C21/04C07C17/20C07C17/383C07C21/18
CPCC07C17/20C07C17/25C07C17/383C07C21/04C07C21/18
Inventor 段琦王通王瑞英田勇徐甲超
Owner SHANDONG HUAAN NEW MATERIAL
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