A composite induction high-purity difluoro-chloroethane production equipment

Abstract

The utility model relates to a kind of composite induction high-purity difluoro monochloroethane production equipment, including difluoroethane feed pipe, chlorine feed pipe, static mixer, buffer tank and photochlorination reactor, difluoroethane feed pipe, chlorine feed pipe are connected static mixer after being sent photochlorination reactor by buffer tank, potassium chloride superfine powder storage tank is connected static mixer and / or buffer tank by trace screw conveyor pump.In the static mixer after mixing of difluoroethane and chlorine feed, potassium chloride superfine powder storage tank can be selected to be sent into static mixer by trace screw conveying, and the quantitative proportion is controlled by the amount of difluoroethane and chlorine feed sent in front section linkage, potassium chloride superfine powder is formed composite induction with photochlorination reactor 365nm medium-long wave ultraviolet light, can reduce chlorination reaction pressure, temperature, long time keeps higher chlorination conversion rate and selectivity, improves product quality, reduces the generation amount of byproduct, hazardous waste.

Description

Technical Field

[0001] This utility model relates to a chemical production equipment, specifically a composite-induced high-purity difluorochloroethane production equipment. Background Technology

[0002] In existing difluorochloroethane chlorination production technologies, photochlorination reactors are generally used. However, in actual photochlorination production, due to factors such as light source aging and differences in the quality of chlorine gas supplied by different manufacturers, the conversion rate and selectivity of photochlorination decrease significantly after a period of use, while byproducts increase, affecting the final purity and conversion rate of the product. Summary of the Invention

[0003] This invention provides a composite-induced high-purity difluorochloroethane production equipment with a simple structure that can effectively improve the efficiency of photochlorination reaction and the quality of the produced difluorochloroethane.

[0004] The technical solution adopted by this utility model is: a composite induced high-purity difluorochloroethane production equipment, including a difluoroethane feed pipe, a chlorine feed pipe, a static mixer and a photochlorination reactor, wherein the difluoroethane feed pipe and the chlorine feed pipe are connected to the static mixer and then fed to the photochlorination reactor, characterized in that: it also includes a potassium chloride ultrafine powder storage tank and a micro-screw conveying pump, wherein the potassium chloride ultrafine powder storage tank is connected to the static mixer via the micro-screw conveying pump.

[0005] A composite-induced high-purity difluorochloroethane production device includes a difluoroethane feed pipe, a chlorine feed pipe, a static mixer, a buffer tank, and a photochlorination reactor. The difluoroethane feed pipe and the chlorine feed pipe are connected to the static mixer and then fed to the photochlorination reactor via the buffer tank. The device is characterized by further including a potassium chloride ultrafine powder storage tank and a micro-screw conveying pump. The potassium chloride ultrafine powder storage tank is connected to the static mixer and / or the buffer tank via the micro-screw conveying pump.

[0006] The amount of potassium chloride ultrafine powder used is 5-10 ppm based on chlorine gas.

[0007] The photochlorination reactor uses ultraviolet light with a wavelength of 254-365nm, and the pressure of the photochlorination reactor is 0.05-0.1MPa, and the temperature is 50-80℃.

[0008] The photochlorination reactor uses 365nm wavelength ultraviolet light.

[0009] The potassium chloride ultrafine powder agglomerates have a particle size of < 500 μm.

[0010] The beneficial effects of this invention are as follows: After difluoroethane and chlorine are mixed in a static mixer, the potassium chloride ultrafine powder can be quantitatively fed into the potassium chloride ultrafine powder storage tank via a micro-screw conveyor. The quantitative ratio is controlled in conjunction with the feed rates of difluoroethane and chlorine. The potassium chloride ultrafine powder forms a composite induction with the 365nm mid-to-long-wave ultraviolet light in the photochlorination reactor, which can reduce the chlorination reaction pressure and temperature, maintain a high chlorination conversion rate and selectivity for a longer period, improve product quality, and reduce the generation of by-products and hazardous waste, resulting in good economic and social benefits. Furthermore, the feed can be selectively sent to the buffer tank after the static mixer simultaneously or separately, ensuring thorough mixing of the potassium chloride ultrafine powder and the raw gas, leading to better reaction efficiency and performance in the photochlorination reactor. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] In the diagram: 1. Difluoroethane feed pipe; 2. Chlorine feed pipe; 3. Static mixer; 4. Buffer tank; 5. Photochlorination reactor; 6. Potassium chloride ultrafine powder storage tank; 7. Micro-volume screw conveyor pump. Detailed Implementation

[0013] The following explanation, in conjunction with the accompanying drawings, will provide further details.

[0014] Figure 1 The diagram shows a composite-induced high-purity difluorochloroethane production equipment, comprising a difluoroethane feed pipe 1, a chlorine feed pipe 2, a static mixer 3, a buffer tank 4, a photochlorination reactor 5, a potassium chloride ultrafine powder storage tank 6, and a micro-volume screw conveyor pump 7. The difluoroethane feed pipe 1 and the chlorine feed pipe 2 are both connected to the static mixer 3. After passing through the static mixer 3, the gas is fed to the photochlorination reactor 5 via the buffer tank 4. The potassium chloride ultrafine powder storage tank 6 is connected to the buffer tank 4 via the micro-volume screw conveyor pump 7.

[0015] Based on the above embodiments, the amount of potassium chloride ultrafine powder used is 5-10 ppm, calculated as chlorine gas.

[0016] Based on the above embodiments, the photochlorination reactor uses ultraviolet light with a wavelength of 254-365nm, the pressure of the photochlorination reactor is 0.05-0.1MPa, and the temperature is 50-80℃. 365nm wavelength ultraviolet light is preferred.

[0017] Based on the above embodiments, the potassium chloride ultrafine powder storage tank 6 can also be connected to the static mixer 3 separately via the micro-screw conveying pump 7, or connected to both the static mixer 3 and the buffer tank 4.

Claims

1. A composite-induced high-purity difluorochloroethane production equipment, comprising a difluoroethane feed pipe, a chlorine feed pipe, a static mixer, and a photochlorination reactor, wherein the difluoroethane feed pipe and the chlorine feed pipe are both connected to the static mixer and then fed into the photochlorination reactor, characterized in that: It also includes a potassium chloride ultrafine powder storage tank and a micro-screw conveying pump, with the potassium chloride ultrafine powder storage tank connected to a static mixer via the micro-screw conveying pump.

2. A composite-induced high-purity difluorochloroethane production equipment, comprising a difluoroethane feed pipe, a chlorine feed pipe, a static mixer, a buffer tank, and a photochlorination reactor, wherein the difluoroethane feed pipe and the chlorine feed pipe are both connected to the static mixer and then fed to the photochlorination reactor via the buffer tank, characterized in that: It also includes a potassium chloride ultrafine powder storage tank and a micro-screw conveyor pump, with the potassium chloride ultrafine powder storage tank connected to a static mixer and / or a buffer tank via the micro-screw conveyor pump.

3. The composite-induced high-purity difluorochloroethane production equipment according to claim 1 or 2, characterized in that: The amount of potassium chloride ultrafine powder used is 5-10 ppm based on chlorine gas.

4. A composite-induced high-purity difluorochloroethane production equipment according to claim 1 or 2, characterized in that: The photochlorination reactor uses ultraviolet light with a wavelength of 254-365nm, and the pressure of the photochlorination reactor is 0.05-0.1MPa, and the temperature is 50-80℃.

5. The composite-induced high-purity difluorochloroethane production equipment according to claim 4, characterized in that: The photochlorination reactor uses 365nm wavelength ultraviolet light.

6. A composite-induced high-purity difluorochloroethane production equipment according to claim 1 or 2, characterized in that: The potassium chloride ultrafine powder agglomerates have a particle size of < 500 μm.

7. The composite-induced high-purity difluorochloroethane production equipment according to claim 3, characterized in that: The potassium chloride ultrafine powder agglomerates have a particle size of < 500 μm.

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