| 摘要 |
A PROCESS FOR FRACTIONATING ISOBUTENE FROM NORMAL BUTENES, INCLUDING: INTRODUCING HYDROGEN AND A FEED STREAM COMPRISING ISOBUTENE, 1-BUTENE, AND 2-BUTENE INTO A FIRST COLUMN (12) INCLUDING A REACTION ZONE CONTAINING A HYDROISOMERIZATION CATALYST OPERATING AT A FIRST PRESSURE AND CONCURRENTLY: (I) CONVERTING AT LEAST A PORTION OF THE 1-BUTENE TO 2-BUTENE, AND (II) SEPARATING ISOBUTENE FROM THE 2-BUTENE; RECOVERING A FIRST OVERHEADS FRACTION (18) COMPRISING ISOBUTENE FROM THE FIRST COLUMN (12); RECOVERING A FIRST BOTTOMS FRACTION (20) COMPRISING ISOBUTENE, 2-BUTENE, AND UNREACTED 1-BUTENE FROM THE FIRST COLUMN (12); INTRODUCING THE FIRST BOTTOMS (20) FRACTION INTO A TOP PORTION OF A SECOND COLUMN (24) COMPRISING A FRACTIONATION COLUMN OPERATING AT A SECOND PRESSURE LOWER THAN THE FIRST PRESSURE: SEPARATING THE FIRST BOTTOMS INTO A SECOND OVERHEADS FRACTION (26) COMPRISING ISOBUTENE AND 1-BUTENE AND A SECOND BOTTOMS FRACTION (28) COMPRISING 2-BUTENE; COMPRESSING THE SECOND OVERHEADS FRACTION (26); AND INTRODUCING THE COMPRESSED SECOND OVERHEADS FRACTION TO A LOWER PORTION OF THE FIRST COLUMN (12). |
