What are the reasons why the chloroform unit in methane chloride production contains dichloromethane?
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Methanol reacts with hydrogen chloride to produce chloromethane; through thermal chlorination with chlorine, dichloromethane, chloroform, and tetrahydrocarbons are produced step by step. However, in practical operations, due to various reasons, chloroform often contains dichloromethane, which affects normal production. Those familiar with this process could please explain the various reasons why dichloromethane is present in chloroform, and how it can be effectively eliminated
In distillation, if the low-boiling compounds are not completely removed, your question is too general – it depends on the specific process involved. What type of technological process are you using? You can message me privately
When you carry out distillation, you don’t completely remove dichloromethane; compounds like dichloro and trichloro substances require distillation and azeotrope formation in order to achieve high purity
Is the boiling range of dichloro chloroform correct?
1. If the process design of the dichlorine distillation tower is correct, it is necessary to ensure that the dichlorine content in the material coming from the top of the tower is 99.99%, while the dichloromethane content in the material coming from the bottom of the tower is below 0.005%. Only when both the material from the top and the material from the bottom meet these standards can it be ensured that the chloroform produced in the tower is free of dichloromethane. It is essential that you do this well. 2. If the vent condenser of your chloroform azeotrope tower uses low-temperature dichloromethane for condensation, you should also check whether there are any leaks in the tubes of the condenser. 3. The azeotropic separators for dichloromethane and chloroform must be treated with alkali separately.
What products does your company manufacture?
The poster could provide a slightly more detailed description of your manufacturing processes, which will help with cause analysis