Apparatus and process for using olefin as an azeotropic entrainer for isolating 1,3-dichloro-2-propanol from a 2,2'-oxybis (1-chloropropane) waste stream
AssigneeDow Global Technologies LLC
InventorsMahesh Ratnakar Sawant, Edward D. Daugs, Mark R. Smit
Life of this patent
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Abstract
Disclosed are a process and an apparatus for using an olefin as an azeotropic entrainer to isolate a target organic compound from a waste stream. The olefin may be, for example, 1-decene, 1-dodecene, or 1-tetradecene. The target organic compound may be 1,3-dichloro-2-propanol in waste stream comprising a 2,2′-oxybis(1-chloropropane).
Claims15
A process comprising:
- supplying a feed stream and an olefin stream to a first distillation column, the feed stream comprising a target organic compound;
- using the olefin as an entrainer in the first distillation column such that the feed stream is separated into at least a first top stream and a first bottom stream;
- and
- using a second distillation column to separate the first top stream into at least a second top stream and a second bottom stream.
A process for isolating 1,3-dichloro-2-propanol, the process comprising:
- supplying a feed stream comprising 1,3-dichloro-2-propanol and 2,2′-oxybis(1-chloropropane) to a first distillation column;
- supplying an olefin stream comprising an olefin to the first distillation column;
- using the olefin as an entrainer in the first distillation column, such that the first stream is separated into at least a first top stream and a first bottom stream, wherein the first top stream comprises 1,3-dichloro-2-propanol and the olefin, and wherein the first bottom stream comprises 2,2′-oxybis(1-chloropropane);
- supplying the first top stream to a second distillation column;
- using the second distillation column to separate the first top stream into at least a second top stream and a second bottom stream, wherein the second bottom stream comprises 1,3-dichloro-2-propanol and the olefin;
- separating in a separator the second bottom stream into at least a third bottom stream and a third top stream, wherein the third bottom stream comprises 1,3-dichloro-2-propanol and the third top stream comprises the olefin;
- and
- returning at least a portion of the third top stream to the first distillation column as the olefin stream.
An apparatus for isolating 1,3-dichloro-2-propanol from a feed stream comprising 2,2′-oxybis(1-chloropropane) and 1,3-dichloro-2-propanol, the apparatus comprising:
- a first distillation column for separating the feed stream into at least a first top stream and a first bottom stream, using an olefin as an entrainer;
- and
- a second distillation column for separating the first top stream into a second top stream and a second bottom stream.
Dependencies are inferred from the claim text.