Method for reusing heavy end by-products in the manufacture...

Details Method for reusing heavy end by-products in the manufacture... Method for reusing heavy end by-products in the manufacture...

2006-09-26

2006-09-26

Price, Elvis O. (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Halogen containing

C570S231000, C570S234000, C570S238000, C570S246000, C570S251000, C570S252000, C570S255000, C570S261000, C570S262000

Reexamination Certificate

active

07112709

ABSTRACT:
A method for recovering much of the carbon and chlorine value in the heavy ends and other undesired by-products formed during the production of a C3or higher polychlorinated alkane through the reaction of carbon tetrachloride with an olefine or chlorinated olefine, the improvement comprising the step of first separating the heavy ends and any other higher or lower boiling chlorohydrocarbon impurities from most of the desired product, and subjecting the separated heavy ends and impurities therewith to a high temperature exhaustive chlorination to produce carbon tetrachloride, tetrachloroethene, and minor amounts of hexachlorobutadiene and hexachlorobenzene by-products.

REFERENCES:
patent: 2442323 (1948-05-01), Davis et al.
patent: 2442324 (1948-05-01), Heitz et al.
patent: 2577388 (1951-12-01), Warren
patent: 2727076 (1955-12-01), Warren
patent: 2857438 (1958-10-01), Obrecht et al.
patent: 5426256 (1995-06-01), Petrosky
patent: 5792893 (1998-08-01), Wilson et al.
patent: 6313360 (2001-11-01), Wilson et al.

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