METHOD TO REDUCE THE FORMATION OF HIGH BOILING COMPOUNDS DURING THE DEHYDROCHLORINATION OF 1,1,1,3-TETRACHLOROPROPANE

摘要

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. Here the improvement comprises, using as the starting material, a mixture comprising HCC-250fb and Heavies generated from the reaction of CCl4 and ethylene to produce HCC-250fb, wherein the Heavies comprise one or more tetrachloropentane isomers. These compounds reduce or eliminate the formation of unwanted high boiling compounds (HBCs).

主权项

1. 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, using as the starting material, a mixture comprising HCC-250fb and Heavies generated from the reaction of CCl4 and ethylene to produce HCC-250fb, wherein the Heavies comprise one or more tetrachloropentane isomers.