Composition of the distillation residue (high-boiling substances) of vinyl chloride produced by the calcium carbide method
Thread Content
This post was last edited by wang*neng on 2009-9-14 08:28. The distillation residues (high-boiling substances) resulting from the calcium carbide process for producing vinyl chloride are generally subjected to further distillation by most manufacturers in order to recover vinyl chloride from them. The residues obtained after this further distillation are usually sold to downstream companies for use in producing solvents and other products. But the downstream companies have asked us about the composition of this residue. I wonder if any of you know it; please let me know. Thank you!
The components of the high-boiling residue are listed in the manual \"Polyvinyl Chloride Production and Operation\" compiled by Mr. Zheng Shizi, as follows: 1. Vinyl chloride content: 16~20%； 2.1, 1-dichloroethane content: 51~53% ； 3. Trans-1,2-dichloroethylene content: 16–20% ； 4. cis-1,2-dichloroethylene content: 3~4% ； 5. Vinylidene chloride content: 0.2~0.6% ； 6. Trichloroethylene content: 0.3~0.45% ； 7.1, 1,2-trichloroethane content: 9~10%. In addition, the high-boiling residue also contains a certain amount of water, as well as impurities such as engine oil brought in by the compressor ； Furthermore, the residue was found to contain vinyl bromide, vinyl acetylene, tetrachloroethylene, oxymethane compounds, chloropropene compounds, and chlorobutene compounds.
The measurement we took in our factory for the upper floor is correct
So, what is the typical amount of water contained in it? This post was last edited by limingshuguang on 2009-4-16 at 22:20
The water content should be at the ppm level, very low.
I don’t know where the bromine in vinyl bromide comes from
It might be impurities in the chlorine gas or impurities in the chilled brine.
The components above are probably the residual liquid; may I ask about the composition of the high-boiling substances?
Mainly 1,1-dichloroethane, as well as vinyl chloride, trichloroethylene, water, etc
May I ask everyone: then how can we determine that the high-boiling substances have been completely removed from the tower?