초록 ▼

In a process for obtaining higher-boiling hydrocarbons from a gaseous stream, the latter is first partially condensed and the thus-formed liquid fraction is introduced into a rectification process whereas the gaseous fraction is scrubbed in a scrubbing column using condense residual gas from the rec

In a process for obtaining higher-boiling hydrocarbons from a gaseous stream, the latter is first partially condensed and the thus-formed liquid fraction is introduced into a rectification process whereas the gaseous fraction is scrubbed in a scrubbing column using condense residual gas from the rectification. The thus-formed bottom product is likewise passed on to rectification. In order to enhance the scrubbing step by condensed gas, higher hydrocarbons are admixed to this residual gas. Thereby, on the one hand, the residual gas is subjected to improved initial condensation and, on the other hand, the scrubbing effect is enhanced.

대표청구항 ▼

A process for the separation of higher-boiling hydrocarbons from a crude gaseous stream container the latter and lower-boiling components, comprising: cooling and partially condensing said crude gaseous stream, and separating the partially condensed gaseous stream into a liquid fraction and a gaseou

A process for the separation of higher-boiling hydrocarbons from a crude gaseous stream container the latter and lower-boiling components, comprising: cooling and partially condensing said crude gaseous stream, and separating the partially condensed gaseous stream into a liquid fraction and a gaseous fraction; fractionating said liquid fraction by a rectification step into a produce stream container essentially higher-boiling hydrocarbons and into a residual gas stream containing lower-boiling components; conducting said gaseous fraction separated after partial condensation to a scrubbing column wherein higher-boiling hydrocarbons are scrubbed out of said gaseous fraction using a scrubbing medium; delivering a fraction enriched in higher-boiling hydrocarbons obtained from the bottom of said scrubbing column to said rectification step; and wherein said scrubbing medium is an admixture formed by adding a liquid stream of C3+, C4+or C5+hydrocarbons to residual gas obtained in said rectification step, said residual gas being subjected to partial condensation prior to use of said admixture as a scrubbing medium.