How to separate hydrogen chloride and sulfur dioxide from methanol
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Methanol component to be recovered from the feed solution: Water: 10%； Hydrogen chloride, sulfur dioxide, thionyl chloride: 5% ； Processing capacity: 25m3/day ； The standard achieved after treatment: moisture content less than 1%. I have not worked on similar system equipment before; I want to preheat the raw materials to around 50°C and send them into a separation buffer tank, where hydrogen chloride and sulfur dioxide gases at the top are condensed and recovered ； The liquid after preliminary treatment enters a distillation tower for further processing; methanol solution is obtained from the top of the tower, while the bottom of the tower yields a mixture of water and thionyl chloride. Please discuss whether this plan works and offer your corrections!
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This post was last edited by qqgd on 2026-2-27 at 10:39. Thionyl chloride is highly chemically reactive; it undergoes intense hydrolysis when in contact with water. In the presence of water, the hydrogen chloride produced through hydrolysis forms hydrochloric acid, while the solubility of sulfur dioxide in water decreases significantly. I think the original poster should first understand the chemical properties of the materials being handled from a chemical reaction perspective, before discussing methods for recycling and processing such materials, including matters related to the operating conditions for those materials as well. Due to the presence of hydrochloric acid, which causes severe corrosion of metals, it is crucial to select the appropriate materials and equipment for contact with the material. Is this related to the treatment of waste liquids from the production process of dichlorosulfoxide, or is it an environmental protection project dealing with the waste generated at the end of the process for preparing alkyl acyl chlorides using dichlorosulfoxide?