Analysis of the source of monobromomethane in the calcium carbide process
Thread Content
The quality of monomers is crucial to the quality of PVC production, and the control of their quality parameters is also very strict. Under normal circumstances, bromomethane is rarely present in calcium carbide-based monomers, but it is sometimes detected during analysis. Where does it come from? ! What impact does it have on quality? ?
Strictly speaking, in chromatographic analysis, the data obtained are not accurate unless specialized bromomethane standard gas is used; it is normal for bromine to be present in crude salt and to end up in the monomers as well. If bromoethane is involved, it’s still understandable, but with bromomethane it’s confusing – can it also break the alkynyl molecular chain to form an alkyl group?
The acetylene gas produced by the calcium carbide method contains a small amount of methane, but it is difficult to determine whether bromine in the raw salt enters the conversion process in its elemental form. It is unlikely that the alkynyl molecular chains are broken.