Method for obtaining crude 1,3-butadiene from a C4 fraction
US7619126B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 19, 2004 |
| Grant date | Nov 17, 2009 |
| Priority date | — |
| Expiry date | May 29, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S203/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for recovering crude 1,3-butadiene from a C4 fraction by extractive distillation using a selective solvent in a dividing wall column (TK) in which a dividing wall (T) is arranged in the longitudinal direction of the column to form a first subregion (A), a second subregion (B) and a lower common column region (C) and which is preceded by an extractive scrubbing column (K), wherein the operation of the dividing wall column (TK) is set by regulation of the energy input into the dividing wall column (TK) via a bottom vaporizer (V) and setting of the number of the theoretical plates in the lower common column region (C) so that a bottom stream (17) consisting of purified solvent is obtained from the dividing wall column (TK), is proposed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.