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AssigneeHoneywell International Inc.
InventorsTerris Yang, Hsueh Sung Tung
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This invention relates to a method to improve 1,1,3-trichloropropene (HCC-1240za) and/or 3,3,3-trichloropropene (HCC-1240zf) selectivity in the dehydrochlorination of 1,1,1,3-tetrachloropropane (HCC-250fb). In normal practice, FeCl3 is used as the catalyst for the dehydrochlorination of HCC-250fb to produce 1,1,3-trichloropropene and/or 3,3,3-trichloropropene. The present invention demonstrates that when using FeCl3 as the catalyst for 1,1,1,3-tetrachloropropane dehydrochlorination, the reaction product contains significant amounts of high boiling compounds, such as pentachlorocyclohexene and/or hexachlorocyclohexane species. The addition of one or more UV-stabilizer and/or anti-oxidant compounds, or mixtures thereof, into the dehydrochlorination reaction system, inhibits the formation of these high boiling compounds and improves selectivity to the desired product.
In the process of the catalytic dehydrochlorination of 1,1,1,3-tetrachloropropane (HCC-250fb) to produce 1,1,3-trichloropropene and/or 3,3,3-trichloropropene, the improvement comprising the addition of one or more UV-stabilizer and/or anti-oxidant compounds, or mixtures thereof, into the dehydrochlorination reaction system to inhibit the formation of high boiling compounds.
In the process of the catalytic dehydrochlorination of chlorinated alkanes to produce chlorinated alkenes, the improvement comprising the addition of one or more UV-stabilizer and/or anti-oxidant compounds, or mixtures thereof, into the dehydrochlorination reaction system to inhibit the formation of high boiling compounds.
A process for the catalytic dehydrochlorination of chlorinated alkanes to produce chlorinated alkenes using one or more metal halides or mixtures as the catalyst, comprising adding one or more UV-stabilizer and/or anti-oxidant compounds, or mixtures thereof, into the dehydrochlorination reaction system to improve the selectivity to the product chlorinated alkenes, wherein the UV-stabilizer and/or anti-oxidant compounds are selected from the group consisting of benzophenones, polyphenols, amines, hydroquinones, methoxy-hydroquinones, triethylamines, di-isopropyl amines, butylated hydroxy anisoles (BHA) and thymols, and mixtures thereof.
Dependencies are inferred from the claim text.