Chlorinated Hydrocarbons¶
Rossberg. (2006). Chlorinated Hydrocarbons. Ullmann's Encyclopedia of Industrial Chemistry.
Cited by¶
1 citation across 1 artifact.
Each citation links to the sentence it supports in the citing article.
Domain-specific¶
- Side Reaction
- The consequences of uncontrolled side reactions propagate downstream as contamination of the product stream (requiring separation), yield losses that scale with throughput, catalyst poisoning when side-reaction products adsorb on active sites, and equipment fouling when polymeric or tarry byproducts deposit on reactor walls — the vinyl chloride synthesis, for instance, controls competing over-cracking, polymerization, and isomerization by holding coil residence time to roughly ten to thirty seconds, temperature to a narrow window near 500 °C, and metering a chlorine-radical promoter such as carbon tetrachloride at of order a thousand parts per million, enough to lift per-pass conversion to about 60 percent but not so much that the same radicals accelerate coking
This sourceThe standard industrial reference for the EDC-to-vinyl-chloride thermal cracking route; the operating window this sentence now gives — a coil residence time of tens of seconds, a narrow window near 500 degrees C, and carbon tetrachloride metered at of order a thousand parts per million as a chlorine-radical promoter — matches the industrial patent literature, though the encyclopedia chapter itself was not reachable for checking. Standard industrial reference for the EDC-to-vinyl-chloride thermal cracking route; the ~500 degrees C figure matches the 480-550 degrees C window given in the industrial patent literature, though the encyclopedia chapter itself was not reachable for checking.
- The consequences of uncontrolled side reactions propagate downstream as contamination of the product stream (requiring separation), yield losses that scale with throughput, catalyst poisoning when side-reaction products adsorb on active sites, and equipment fouling when polymeric or tarry byproducts deposit on reactor walls — the vinyl chloride synthesis, for instance, controls competing over-cracking, polymerization, and isomerization by holding coil residence time to roughly ten to thirty seconds, temperature to a narrow window near 500 °C, and metering a chlorine-radical promoter such as carbon tetrachloride at of order a thousand parts per million, enough to lift per-pass conversion to about 60 percent but not so much that the same radicals accelerate coking
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