Method for processing hydrocarbon pyrolysis effluent
US7674366B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 2005 |
| Grant date | Mar 9, 2010 |
| Priority date | — |
| Expiry date | Feb 3, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G9/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method is disclosed for treating the effluent from a hydrocarbon pyrolysis unit without employing a primary fractionator. The method comprises cooling the gaseous effluent, e.g., by direct quench and/or at least one primary heat exchanger, thereby generating high pressure steam, and then cooling the gaseous effluent to a temperature at which tar, formed by reactions among constituents of the effluent, condenses. The resulting mixed gaseous and liquid effluent is passed through a quench oil knock-out drum, to separate quench oil from the gaseous effluent which is then cooled to condense a liquid effluent comprising pyrolysis gasoline and water condensed from steam, which fractions are separated in a distillate drum. The cooled gaseous effluent is directed to a recovery train, to recover light olefins. The pyrolysis gasoline-containing fraction passes to a tailing tower which provides an overhead stream rich in pyrolysis gasoline and a bottoms stream rich in gas oil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.