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US 12,338,215 B2Granted
Process and apparatus for preparing purified styrene composition using divided-wall column and crystallization unit
AssigneeSulzer Management AG
InventorsRahul Khandelwal, Joseph C. Gentry, Erik Temmel, Manfred Stepanski
Life of this patent
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Abstract
A method for preparing a purified styrene composition includes providing a crude hydrocarbon composition containing styrene, subjecting the crude hydrocarbon composition to a distillation in a divided-wall column to produce an overhead hydrocarbon stream, a bottom hydrocarbon stream and a side hydrocarbon stream and subjecting the side hydrocarbon stream to at least one crystallization step to obtain a purified styrene composition.
Claims18
A method for preparing a purified styrene composition, the method comprising:
- providing a crude hydrocarbon composition containing styrene,
- subjecting the crude hydrocarbon composition to a distillation in a divided-wall column to produce an overhead hydrocarbon stream, a bottom hydrocarbon stream, and a side hydrocarbon stream and
- subjecting the side hydrocarbon stream to at least one crystallization step to obtain a purified styrene composition.
A plant for preparing a purified styrene composition comprising:
- at least one divided-wall column;
- and
- at least one crystallization block, the divided-wall column comprising an inlet line for a crude hydrocarbon composition containing styrene, a line for overhead hydrocarbon stream, a line for bottom hydrocarbon stream and a line for side hydrocarbon stream, the at least one crystallization block comprising an inlet line, the line for side hydrocarbon stream of the divided-wall column being the inlet line of the at least one crystallization block, and the at least one crystallization block comprising two or more static crystallization stages and two or more dynamic crystallization stages.
Dependencies are inferred from the claim text.