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Method of photo-catalyzing hydrogen chloride to prepare chlorine and device thereof

A technology of photocatalytic oxidation and hydrogen chloride gas, which is applied in the direction of preparation of chloride, chlorine/hydrogen chloride, etc., can solve the problems of reduced conversion rate of hydrogen chloride, high cost, heat balance interference, etc., and achieve easy production capacity, mild reaction conditions and low investment Effect

Active Publication Date: 2020-02-18
FININGS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the existing photocatalytic hydrogen chloride oxidation technology can obtain a higher conversion rate, the feed rate and pressure must be strictly controlled. If the feed rate is too high or too low or the pressure changes, the heat balance of the reaction process will be disturbed. , resulting in a significant decrease in the conversion of hydrogen chloride
In the process of industrial production, it is still quite difficult to achieve a large conversion rate, and the cost is also high

Method used

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  • Method of photo-catalyzing hydrogen chloride to prepare chlorine and device thereof
  • Method of photo-catalyzing hydrogen chloride to prepare chlorine and device thereof
  • Method of photo-catalyzing hydrogen chloride to prepare chlorine and device thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0050] use as figure 1 The shown device comprises a reactor 1, the reactor 1 is provided with a gas feed port 5, a liquid discharge port 6 and a gas discharge port 10, the inside of the reactor 1 is provided with a light source, and is ventilated without The light-transmitting structure 4 divides the interior of the reactor 1 into at least a light-irradiated area 2 and a light-free area 3, the light-irradiated area 2 can be irradiated by light, and the light-free area 3 cannot be irradiated by light. Gas can flow between the irradiated area 2 and the light-free area 3 . The air-permeable and opaque structure described in this embodiment is a louver structure, and the schematic diagram of its components is as follows figure 2 As shown, the louver structure is composed of four curved boards. When assembled, adjacent boards are partially overlapped and gaps are left to block light and allow air to circulate. During the implementation process, the four boards can be further A r...

Embodiment 2

[0055] The device diagram of embodiment 2 is the same as that of embodiment 1, and jackets or other heat exchange equipment are respectively arranged in the light irradiation area and the no light area so as to control the temperature of the light irradiation area and the no light area respectively. Among them, a coil heat exchanger is set in the light irradiation area, and a jacket heat exchange is set outside the light-free area, and the air-permeable and opaque structure in the reactor is made of heat-insulating material. The temperature of the feed gas is 20°C, the pressure of the reactor is controlled to be 1MPa, the temperature of the light irradiation zone is controlled to be 60°C, and the average temperature of the dark zone is controlled to be 20°C. Hydrogen chloride and oxygen continuously react, and the product water and chlorine are continuously liquefied and discharged from the reactor. After being collected and further processed, liquid chlorine can be obtained. I...

Embodiment 3

[0057] use as image 3 The shown device comprises a reactor 1, the reactor 1 is a tubular structure, the reactor 1 is provided with a gas inlet 5, a liquid outlet 6 and a gas outlet 10, a part of the reactor 1 inside A light source 9 is provided, and the other part has no light source, and the interior of the reactor 1 is divided into a light-irradiated area 2 and a light-free area 3 by a gas-permeable and opaque structure 4, the light-irradiated area 2 can be radiated by light, and The light-free zone 3 cannot be irradiated by light, and the gas between the light-irradiated zone 2 and the light-free zone 3 can communicate. The air-permeable and opaque structure described in this embodiment is a double-layer board structure, the inner and outer boards of the double-layer board are provided with staggered holes, and the outer surface of the reactor is provided with a jacket layer 8 . The light source 9 is arranged in a strip shape.

[0058] In this embodiment, a jacket layer ...

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Abstract

The invention relates to the field of hydrogen chloride catalytic oxidation, and discloses a method of photo-catalyzing hydrogen chloride to prepare chlorine and a device thereof. A reactor is dividedinto a light irradiation area and a light-free area. The light irradiation area can be irradiated by light, and the light-free area cannot be irradiated by light. The wavelength of the light is in arange of 150 to 278 nm. The gas can circulate between the light irradiation area and the light-free area. The continuous inverse photolysis of products due to light irradiation can be avoided, and thus the yield is increased.

Description

technical field [0001] The application relates to the field of catalytic oxidation of hydrogen chloride, in particular to a method and device for preparing chlorine gas by photocatalytic oxidation of hydrogen chloride. Background technique [0002] Chlorine is an important chemical product and raw material, mainly used in polyvinyl chloride, MDI, TDI, methane chloride, synthetic rubber, silicon materials, chlorofluorocarbons, building materials, medicine and other fields. In the production process, the utilization rate of chlorine is generally about 50%, and the same volume of hydrogen chloride gas is usually by-produced. The outlet for a large amount of by-product hydrogen chloride has become a common problem restricting the sustainable development of chlorine-related industries. By making chlorine by-product hydrogen chloride and putting it back into the production chain, a circular economic reaction system for chlorine can be constructed. [0003] The conversion of by-p...

Claims

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Application Information

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IPC IPC(8): C01B7/04
CPCC01B7/04
Inventor 王农跃沙艳松章冬霞李斌
Owner FININGS CO LTD
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