Discussion on the process route for synthesizing vinyl chloride using the acetylene-hydrogen chloride fluidized bed method

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There are many methods for producing vinyl chloride. The main industrial methods for producing it include the ethylene oxychlorination method, the combined method, and the acetylene method, among others. At present, about 70% of manufacturers in China use the calcium carbide-acetylene method to produce vinyl chloride. This is due to the relatively scarce oil resources in China, as well as the abundant coal and limestone resources, along with the current situation of the chlor-alkali industry. Especially in recent years, with the soaring oil prices and a prominent supply-demand imbalance for polyvinyl chloride, the production of polyvinyl chloride using the calcium carbide-acetylene method has seen rapid development in China. However, the traditional calcium carbide-acetylene fixed-bed process has drawbacks such as large floor space and long process flow, especially severe environmental pollution. The use of a bubbling-bed reactor for the production of vinyl chloride offers the following advantages over traditional fixed-bed reactors: 1. Stable process control, with reactions taking place at higher temperatures and pressures, resulting in a significantly improved acetylene conversion rate. 2. The equipment is simplified, reducing the workload. 3. The equipment corrosion problem has been solved. 4. Waste treatment is simpler, with no acid-containing wastewater generated. 5. The device’s floor space is **reduced**. Abroad, the calcium carbide production method was discontinued in the 1970s; as a result, there are few studies on fluidized bed technology, and limited research materials are available domestically as well. I am currently researching this method and hope to exchange more ideas with colleagues, as well as pursue collaborative research. My email address is pvc543211@163.com