Method for improving synthesis yield by utilizing thionyl chloride synthesis energy

Abstract

The invention discloses a method for improving synthesis yield by utilizing synthesis energy of thionyl chloride, which comprises the following steps: S1, introducing low-temperature heat-conducting oil into a jacket of a catalyst, and taking away redundant heat generated by reaction of the catalyst by utilizing the low-temperature heat-conducting oil through the jacket of the catalyst to control redundant heat generated during catalytic synthesis of thionyl chloride; s2, heating the synthesis gas generated by the synthesis kettle in a catalytic gas-phase heat exchanger by the heat-conducting oil after heat exchange, and preventing gas foam generated by the synthesis gas from being entrained into a catalyst for reaction; and S3, introducing the synthesis gas heated in S2 into a catalyst for catalytic synthesis of a thionyl chloride crude product. According to the method, the defects in the prior art are overcome, the yield of catalytic synthesis of thionyl chloride is increased, energy is recycled, the production cost is reduced, the production efficiency is greatly improved, meanwhile, the reaction efficiency and the material utilization rate of the whole production process are optimized, the economic benefits of enterprises are increased, and the method has high social use value and application prospects.

Description

technical field

[0001] The invention relates to the technical field of synthesis of thionyl chloride, in particular to a method for improving synthesis yield by utilizing energy in the synthesis of thionyl chloride. Background technique

[0002] Thionyl chloride (SOCl2) is an important fine chemical raw material in the development of my country's national economy. In the "National High-tech Product Catalog" issued by the former State Science and Technology Commission, "pharmaceuticals, veterinary drugs, pesticides, intermediates and products" are listed as high-tech products. Domestic production of thionyl chloride includes chlorosulfonic acid method, co-production method, sulfur trioxide method and sulfur dioxide gas phase method. The main raw materials for the production of thionyl chloride by sulfur dioxide gas phase method are SO2, Cl2, S2Cl2, and the reaction equation is: S2Cl2+Cl2→SCl2

[0003] SO2+Cl2+SCl2→SOCl2

[0004] During the production process, the synthesis...

Examples

Embodiment 1

[0026] refer to figure 1 , a kind of synthetic energy utilization of thionyl chloride improves the method for synthetic yield, comprises the following steps:

[0027] S1: Introduce low-temperature heat transfer oil at -20-0°C to the jacket of the catalytic converter, and use the low-temperature heat transfer oil to pass through the jacket of the catalytic converter to take away the excess heat generated by the reaction of the catalytic converter to control the generation of thionyl chloride during catalytic synthesis excess heat;

[0028] The temperature of the catalytic converter is controlled at 300°C, and the temperature of the heat transfer oil after heat exchange is 200°C;

[0029] S2: The heat transfer oil after heat exchange heats the 60°C synthesis gas generated in the synthesis tank in the catalytic gas phase heat exchanger to prevent the synthesis gas from being entrained into the catalytic converter for reaction;

[0030] Among them, the composition of the synthes...

Embodiment 2

[0034] refer to figure 1 , a kind of synthetic energy utilization of thionyl chloride improves the method for synthetic yield, comprises the following steps:

[0035] S1: Introduce low-temperature heat transfer oil at -20-0°C to the jacket of the catalytic converter, and use the low-temperature heat transfer oil to pass through the jacket of the catalytic converter to take away the excess heat generated by the reaction of the catalytic converter to control the generation of thionyl chloride during catalytic synthesis excess heat;

[0036] The temperature of the catalytic converter is controlled at 310°C, and the temperature of the heat transfer oil after heat exchange is 210°C;

[0037] S2: The heat transfer oil after heat exchange heats the 60°C synthesis gas generated in the synthesis tank in the catalytic gas phase heat exchanger to prevent the synthesis gas from being entrained into the catalytic converter for reaction;

[0038] Among them, the composition of the synthes...

Embodiment 3

[0042] refer to figure 1 , a kind of synthetic energy utilization of thionyl chloride improves the method for synthetic yield, comprises the following steps:

[0043] S1: Introduce low-temperature heat transfer oil at -20-0°C to the jacket of the catalytic converter, and use the low-temperature heat transfer oil to pass through the jacket of the catalytic converter to take away the excess heat generated by the reaction of the catalytic converter to control the generation of thionyl chloride during catalytic synthesis excess heat;

[0044] The temperature of the catalytic converter is controlled at 350°C, and the temperature of the heat transfer oil after heat exchange is 230°C;

[0045] S2: The heat transfer oil after heat exchange heats the 60°C synthesis gas generated in the synthesis tank in the catalytic gas phase heat exchanger to prevent the synthesis gas from being entrained into the catalytic converter for reaction;

[0046] Among them, the composition of the synthes...

technical field

[0001] The invention relates to the technical field of synthesis of thionyl chloride, in particular to a method for improving synthesis yield by utilizing energy in the synthesis of thionyl chloride. Background technique

[0002] Thionyl chloride (SOCl2) is an important fine chemical raw material in the development of my country's national economy. In the "National High-tech Product Catalog" issued by the former State Science and Technology Commission, "pharmaceuticals, veterinary drugs, pesticides, intermediates and products" are listed as high-tech products. Domestic production of thionyl chloride includes chlorosulfonic acid method, co-production method, sulfur trioxide method and sulfur dioxide gas phase method. The main raw materials for the production of thionyl chloride by sulfur dioxide gas phase method are SO2, Cl2, S2Cl2, and the reaction equation is: S2Cl2+Cl2→SCl2

[0003] SO2+Cl2+SCl2→SOCl2

[0004] During the production process, the synthesis...

Examples

Embodiment 1

[0026] refer to figure 1 , a kind of synthetic energy utilization of thionyl chloride improves the method for synthetic yield, comprises the following steps:

[0027] S1: Introduce low-temperature heat transfer oil at -20-0°C to the jacket of the catalytic converter, and use the low-temperature heat transfer oil to pass through the jacket of the catalytic converter to take away the excess heat generated by the reaction of the catalytic converter to control the generation of thionyl chloride during catalytic synthesis excess heat;

[0028] The temperature of the catalytic converter is controlled at 300°C, and the temperature of the heat transfer oil after heat exchange is 200°C;

[0029] S2: The heat transfer oil after heat exchange heats the 60°C synthesis gas generated in the synthesis tank in the catalytic gas phase heat exchanger to prevent the synthesis gas from being entrained into the catalytic converter for reaction;

[0030] Among them, the composition of the synthes...

Embodiment 2

[0034] refer to figure 1 , a kind of synthetic energy utilization of thionyl chloride improves the method for synthetic yield, comprises the following steps:

[0035] S1: Introduce low-temperature heat transfer oil at -20-0°C to the jacket of the catalytic converter, and use the low-temperature heat transfer oil to pass through the jacket of the catalytic converter to take away the excess heat generated by the reaction of the catalytic converter to control the generation of thionyl chloride during catalytic synthesis excess heat;

[0036] The temperature of the catalytic converter is controlled at 310°C, and the temperature of the heat transfer oil after heat exchange is 210°C;

[0037] S2: The heat transfer oil after heat exchange heats the 60°C synthesis gas generated in the synthesis tank in the catalytic gas phase heat exchanger to prevent the synthesis gas from being entrained into the catalytic converter for reaction;

[0038] Among them, the composition of the synthes...

Embodiment 3

[0042] refer to figure 1 , a kind of synthetic energy utilization of thionyl chloride improves the method for synthetic yield, comprises the following steps:

[0043] S1: Introduce low-temperature heat transfer oil at -20-0°C to the jacket of the catalytic converter, and use the low-temperature heat transfer oil to pass through the jacket of the catalytic converter to take away the excess heat generated by the reaction of the catalytic converter to control the generation of thionyl chloride during catalytic synthesis excess heat;

[0044] The temperature of the catalytic converter is controlled at 350°C, and the temperature of the heat transfer oil after heat exchange is 230°C;

[0045] S2: The heat transfer oil after heat exchange heats the 60°C synthesis gas generated in the synthesis tank in the catalytic gas phase heat exchanger to prevent the synthesis gas from being entrained into the catalytic converter for reaction;

[0046] Among them, the composition of the synthes...

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