Process for n-butanizing field butane feedstock to thermal crackers
AssigneeSabic Global Technologies B.V.
InventorsVijay Dinkar BODAS, Sultan AL-OTAIBE, Guillermo LEAL, Mohammed Bismillah ANSARI
Life of this patent
Estimating the term…
Abstract
Described is a process for producing field butane. The process includes increasing the n-butane concentration in field butane. The process may include a concentration process that includes distillation and a thermal cracking process.
Claims20
A method of increasing n-butane concentration in field butane, the method comprising:
- subjecting a feed stream, comprising primarily n-butane and isobutane collectively, to a concentrating process, the concentrating process comprises distilling, in one or more distillation columns, and produces a first product stream comprising primarily n-butane and a second product stream comprising methane, ethane, and propane;
- and
- cracking, in a thermal cracker, the first product stream to produce a third product stream comprising primarily ethylene and a fourth product stream comprising primarily n-butane;
- and
- recycling, from the thermal cracker, at least some of the fourth product stream to the one or more distillation columns.
The method of 1, wherein the feed stream comprises 62 mol. % to 72 mol. % n-butane and 24 mol. % to 34 mol. % isobutane and wherein the first product stream comprises 85 mol. % to 95 mol. % n-butane.
The method of 1, wherein the feed stream comprises 94 mol. % to 98 mol. % n-butane and isobutane collectively.
The method of 1, wherein the feed stream further comprises n-pentane.
The method of 1, wherein the second product stream further comprises 5 mol. % to 15 mol. % methane, 15 mol. % to 25 mol. % ethane, and 65 mol. % to 75 mol. % propane.
Dependencies are inferred from the claim text.