Removal of c3 lights from lpg feedstock to butane isomerization unit
AssigneeSabic Global Technologies B.V.
InventorsVijay Dinkar BODAS, Guillermo LEAL CANELON, Mohammed Bismillah ANSARI
Life of this patent
Estimating the term…
Abstract
Systems and methods for processing a C3 and C4 hydrocarbon mixture have been disclosed. The C3 and C4 hydrocarbon mixture is first processed in an isomerization unit to isomerize n-butane to form isobutane. The resulting effluent stream from the isomerization unit comprising primarily isobutane and C3 hydrocarbons, collectively, is flowed into a separation unit configured to separate the effluent stream to form a C3 stream comprising C1 to C3 hydrocarbons and a C4 stream comprising primarily isobutane. The isobutane in the C4 stream is further dehydrogenated to form isobutene, which is further flowed into an MTBE synthesis unit as a feedstock for producing MTBE.
Claims20
A method of processing a hydrocarbon mixture, the method comprising:
- processing a hydrocarbon mixture comprising propane, n-butane, and isobutane in an isomerization unit under reaction conditions sufficient to isomerize the n-butane to produce isobutane and form an isomerization unit effluent comprising propane, isobutane, or combinations thereof;
- separating the isomerization unit effluent to form a C3 stream comprising propane and a C4 stream comprising isobutane;
- cracking the propane of the C3 stream under reaction conditions sufficient to produce propylene;
- dehydrogenating the isobutane of the C4 stream in a dehydrogenation unit to produce isobutene in a dehydrogenation unit effluent;
- and
- reacting, in an etherification unit, the isobutene of the dehydrogenation unit effluent with an alkanol in the presence of a catalyst under reaction conditions sufficient to produce alkyl tert-butyl ether in a product stream.
A method of processing a hydrocarbon mixture, the method comprising:
- processing a first hydrocarbon mixture comprising propane, n-butane, and isobutane in an isomerization unit under reaction conditions sufficient to isomerize the n-butane to produce isobutane and form an isomerization unit effluent comprising propane, isobutane, or combinations thereof;
- separating a second hydrocarbon mixture comprising propane, n-butane, and isobutane in a second separation unit to produce an overhead stream comprising primarily propane and isobutane, collectively, and a first C4 stream comprising n-butane and isobutane;
- combining the overhead stream and the isomerization unit effluent to form a combined stream;
- separating the combined stream to form a C3 stream comprising primarily propane and a second C4 stream comprising isobutane;
- dehydrogenating the isobutane of the second C4 stream in a dehydrogenation unit to produce isobutene in a dehydrogenation unit effluent;
- and
- reacting, in an etherification unit, the isobutene of the dehydrogenation unit effluent with an alkanol in the presence of a catalyst under reaction conditions sufficient to produce an alkyl tert-butyl ether in a product stream.
Dependencies are inferred from the claim text.