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US 8,940,954 B2Granted
Conversion of propane to propylene
AssigneeReaction35, LLC
InventorsVivek Julka, Sagar Gadewar, Peter K. Stoimenov, Philip Grosso, Jeffrey H. Sherman, Aihua Zhang, Eric W. McFarland
Life of this patent
Estimating the term…
Abstract
A process is disclosed that includes brominating a C2, C3, C4, C5 or C6 alkane with elemental bromine to form a bromo-alkane. The bromo-alkane is reacted to form a C2, C3, C4, C5 or C6 alkene and HBr. The HBr is oxidized to form elemental bromine.
Claims17
A process comprising:
- providing a stream comprising primarily propane;
- reacting at least some of the propane with bromine to form a dibromopropane, bromopropane, HBr, and propane mixture;
- separating the dibromopropane, brompropane, HBr, and propane from the dibromopropane, bromopropane, HBr, and propane mixture;
- reacting the dibromopropane with a source of hydrogen to form a second bromopropane stream comprising bromopropane;
- dehydrobrominating the bromopropane in the second bromopropane stream to form a propylene and HBr mixture;
- separating the propylene and HBr mixture to form propylene and recycle HBr;
- oxidizing the recycle HBr to form a bromine and water mixture;
- and
- separating the bromine and water mixture to form recycle bromine.
6 more elements
A process comprising:
- providing a process feed stream comprising primarily propane;
- reacting at least some of the propane in the process feed stream with bromine in a bromine recycle stream to form a dibromopropane, bromopropane, HBr, and propane stream comprising a mixture of dibromopropane, bromopropane, HBr, and propane;
- separating the dibromopropane, bromopropane, HBr, and propane stream to form a dibromopropane stream, a bromopropane stream, an HBr stream, and a propane recycle stream;
- combining the propane recycle stream with a fresh propane stream to form the process feed stream;
- reacting the dibromopropane stream with a source of hydrogen;
- combining the bromopropane stream with a portion of a bromopropane recycle stream to form a bromopropane feed stream;
- dehydrobrominating the bromopropane in the bromopropane feed stream to form a propylene, HBr, and bromopropane mixture;
- separating the propylene, HBr, and bromopropane mixture to form a propylene product stream, a recycle HBr stream and the bromopropane recycle stream;
- combining the HBr stream and the recycle HBr stream to form an oxidizer feed stream;
- oxidizing the oxidizer feed stream to form a bromine and water mixture stream;
- and
- separating the bromine and water mixture to form the recycle bromine stream.
9 more elements
A process comprising:
- providing a process feed stream comprising propane;
- providing a bromine stream comprising bromine;
- reacting at least some of the propane in the process feed stream with bromine in the bromine stream to form a dibromopropane, bromopropane, HBr, and propane stream;
- separating the dibromopropane, bromopropane, HBr, and propane stream to form a lights stream comprising propane and HBr, a bromopropane stream, and a dibromopropane stream;
- reacting the dibromopropane stream with a source of hydrogen;
- combining the lights stream with aqueous HBr;
- absorbing the HBr from the lights stream to form a recycle propane stream and a concentrated HBr stream;
- combining the recycle propane stream with a fresh propane stream to form the process feed stream;
- stripping dry HBr from the concentrated HBr stream to form an HBr gas stream;
- combining the bromopropane stream with a recycle bromopropane stream to form a dehydrobromination feed stream;
- dehydrobrominating the dehydrobromination feed stream to form a dehydrobromination reactor discharge stream comprising HBr, propylene, and bromopropane;
- absorbing the HBr in the dehydrobromination reactor discharge stream using aqueous HBr to form a propylene stream comprising primarily propylene and a concentrated HBr stripper feed stream;
- separating the bromopropane from the propylene;
- stripping the HBr from the concentrated HBr stripper feed stream to form an HBr oxidation stream;
- combining the HBr oxidation stream and the HBr gas stream to form an oxidation feed stream;
- oxidizing the oxidation feed stream to form a bromine and water mixture stream;
- and
- separating bromine from water in the bromine and water mixture stream to form the bromine stream.
15 more elements
Dependencies are inferred from the claim text.