B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
202/76
B01D 3/40 (2006.01) C07C 7/08 (2006.01) C07C 7/10 (2006.01) C07C 7/11 (2006.01) C10G 21/12 (2006.01) C10G 21/20 (2006.01)
Patent
CA 1091615
ABSTRACT OF THE DISCLOSURE: The invention is concerned with a method of separating a diolefin from a mixture thereof with other hydrocarbons by an extractive distillation. The method of the invention comprises feeding a stream of the mixture of hydrocarbons to a first extractive distillation column, feeding a stream of solvent comprised of N-methyl-morpholine-3-one to the first extractive distillation column, withdrawing the other hydrocarbons and a minor quantity of the diolefin from the head of the first extractive distillation column, recovering the solvent and the balance of the diolefin from the first extractive distillation column as bottom product, feeding the bottom product from the first extractive distillation column to a second extractive dis- tillation column, recovering the diolefin in the bottom product of the first extractive distillation column from the second extractive distillation column as head product, withdrawing the solvent in the bottom product of the first extractive distilla- tion column from the second extractive distillation column as bottom product, and recycling the bottom product from the second extractive distillation column to the first extractive distilla- tion column. The method of the invention is particularly use- ful for the separation of butadiene from a mixture of C4 hydro- carbons, or of isoprene from a mixture of C5 hydrocarbons.
269662
Robic Robic & Associes/associates
Snamprogetti S.p.a.
LandOfFree
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