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[Chemical Knowledge]：Manufacturing method and process of thionyl chloride

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The manufacturing method

of thionyl chloride. Thionyl chloride is an important raw material for chemical production, which is widely used in medicine, pesticide, dye, paint, chemical industry and other industries. This article will introduce the manufacturing method of thionyl chloride, including raw material preparation, reaction process, post-treatment and precautions.

1. raw material preparation

manufacturing thionyl chloride is the main raw material for sulfur dioxide, chlorine and sulfur. Wherein, sulfur dioxide and chlorine gas can be mixed in proportion and then introduced into the reactor, and sulfur is added into the reactor as a catalyst.

2. reaction process

1. The reactor is heated to a certain temperature, and mixed gas is introduced to make sulfur dioxide and chlorine react under the action of catalyst to generate thionyl chloride and sulfuric acid.

2. the reaction process needs to control a certain temperature and pressure, in order to ensure the smooth progress of the reaction. At the same time, the mixed gas needs to be continuously introduced to maintain the pressure in the reactor.

3. After completion of the reaction, the mixed gas was stopped and the reactor was cooled to room temperature.

3. Post-Treatment

1. The reactor was vented and the thionyl chloride product was collected.

2. Absorb the remaining acid gases such as sulfuric acid and sulfur dioxide in the reactor with alkali to meet environmental protection requirements.

3. Refine the thionyl chloride product to remove impurities.
Precautions for
4.

1. During the manufacturing process, it is necessary to strictly control the reaction temperature and pressure to prevent damage to the reactor and dangerous accidents.

2. High-quality raw materials and catalysts are required to ensure product quality and yield.

3. In the post-processing process, it is necessary to pay attention to environmental protection requirements and properly treat the exhaust gas to avoid environmental pollution.

In short, the manufacture of thionyl chloride requires strict control of reaction conditions and raw material quality, and compliance with environmental protection requirements to ensure product quality and yield. At the same time, it is necessary to pay attention to safety in the production process to prevent dangerous accidents.

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