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US 8,410,323 B2Granted
Process for downstream recovery of nitroalkane using dividing wall column
AssigneeDow Global Technologies LLC
InventorsMahesh Sawant, Daniel M. Trauth, John G. Pendergast, Jr.
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Abstract
Disclosed are a process and apparatus for synthesizing nitroalkanes by reaction of a hydrocarbon feedstock with aqueous nitric acid. Energy and capital costs may be reduced by using a dividing wall column.
Claims16
A process for synthesizing at least one nitroalkane, the process comprising:
- reacting in a reactor a hydrocarbon feedstock with aqueous nitric acid, such that a product stream is produced;
- separating the product stream into at least an oil phase and an aqueous phase;
- removing substantially all organic acids from the oil phase;
- thereafter, distilling the oil phase in a dividing wall column, to recover at least a top product, a middle product, and a bottom product;
- and
- recovering the at least one nitroalkane from the middle product.
3 more elements
A process for nitroalkane recovery, the process comprising:
- separating a product stream from a nitroparaffin nitration process into at least an oil phase and an aqueous phase;
- distilling the oil phase in a dividing wall column, to recover at least a top product, a middle product, and a bottom product;
- recovering at least a first nitroalkane from the middle product;
- and
- recovering at least a second nitroalkane from the bottom product.
2 more elements
Dependencies are inferred from the claim text.