Industrial preparation chloromethanes

Trimethylaluminum cannot be prepared by any of the above processes, which rely on alkene insertion. The industrial preparation of trimethylaluminum is achieved by reaction of ground aluminum with chloromethane to yield the sesquichloride, Me3Al2Cl3, and subsequent reduction with sodium metal (equation 8). This procedure also works for the... 

The industrial preparation of chloromethane derivatives is based to a wide extent on the treatment of methane and/or monochloromethane with chlorine, whereby the chlorination products are obtained as a mbcture of the individual stages of chlorination ... 

One of the chief uses of chloromethane is as a starting material from which sili cone polymers are made Dichloromethane is widely used as a paint stripper Trichloromethane was once used as an inhalation anesthetic but its toxicity caused it to be replaced by safer materials many years ago Tetrachloromethane is the starting mate rial for the preparation of several chlorofluorocarbons (CFCs) at one time widely used as refrigerant gases Most of the world s industrialized nations have agreed to phase out all uses of CFCs because these compounds have been implicated m atmospheric processes that degrade the Earth s ozone layer... 

As an example of an industrially useful radical reaction, look at the chlorination of methane to yield chloromethane. This substitution reaction is the first step in the preparation of the solvents dichloromethane (CHoCl ) and chloroform (CHCI3). 

Hydroxyethyl methyl cellulose. HEMC [9032-42-2] Prepared by etherification of alkaline cellulose with chloromethane and oxirane. Commercial samples have methyl DS values of 1.3 - 2.2 and hydroxyethyl MS values of 0.06 - 0.5. Thickening and binding agent with widespread industrial uses in adhesives, building products, films, wetting agents. Pharmaceutical adjuvant. Better water solubility and electrolyte tolerance than methyl cellulose. Thermally gellable in hot water. Soly in org. soivs. varies with DS value. 

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