| 摘要 |
<p>A method of preparing carbon tetrachloride of high purity from a crude mixture comprising lower aliphatic hydrocarbons, includes a step of liquid-phase chlorination at about 160 DEG -200 DEG C. and a step of vapor-phase chlorolysis at about 450 DEG -600 DEG C. in the presence of a metal chloride catalyst such as MoCl5. This method has both economic and anti-pollution advantages in the treatment of otherwise waste residues from the industrial manufacture of, for example, vinylchloride monomer, ethylene and propylene oxides or chloroprene. Carbon tetrachloride is an old product having known utilities as solvent for resins, waxes, lacquers and for dry cleaning; also as fire-extinguisher, extractor of seeds, anthelmintic in hookworms, exterminator of grain weevils, etc.</p> |
