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US 5,315,052 AGranted
Concurrent production of trichloroethane isomers
AssigneePPG Industries, Inc.
InventorsTommy G. Taylor, J. Douglas Mansell, John P. Shamburger, Mark E. Woodyear
Life of this patent
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Abstract
1,1,1-Trichloroethane (viz., methylchloroform) and 1,1,2-trichloroethane are produced in the same reactor by feeding molecular chlorine and chloroethene (viz., vinyl chloride) as well as 1,1-dichloroethane to the reactor. The ratios at which the two trichloroethanes are produced can be easily controlled by controlling the relative ratios of 1,1-dichloroethane and chloroethene introduced to the reactor. The reactions are conducted in the liquid phase in the presence of free radical initiator.
Claims21
In a method for conducting liquid phase chlorination wherein:
- (a) 1,1-dichloroethane and molecular chlorine are introduced to a reactor containing a liquid phase reaction mixture which comprises free radical initiator;
- and
- (b) organic reaction product comprising 1,1,1-trichloroethane is removed from said reactor;
- the improvement wherein:
- (c) chloroethene is introduced to said reactor;
- (d) said organic reaction product also comprises 1,1,2-trichloroethane;
- (e) the molar ratio of said 1,1,2-trichloroethane to said 1,1,1-trichloroethane in said organic reaction product is in the range of from 0.2:1 to 2:1;
- and
- (f) said 1,1,1-trichloroethane and said 1,1,1-trichloroethane together constitute at least 40 percent by weight of said organic reaction product.
6 more elements
Dependencies are inferred from the claim text.