Process for removing extraneous odour-forming substances from hydrocarbon streams
AssigneeEvonik Oxeno GmbH
InventorsStephan Peitz, Guido Stochniol, Armin Matthias Rix, Matthias Böse, Tanita Valèrie Six, Martin Althoff, Ralf Boll, Helena Lopez-Fernandez
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Abstract
A process can be used for purifying a hydrocarbon stream containing at least Cx alkanes, Cx olefins, low boilers such as Cx−1 hydrocarbons, and high boilers such as Cx+1 hydrocarbons, with x=3 or 4. The process involves separating off low boilers and separating off high boilers, wherein the separating-off of high boilers is performed in the presence of hydrogen and hence a hydrogenation of the olefins present takes place.
Claims16
A process for purifying a hydrocarbon stream comprising at least a Cx alkane, a Cx olefin, low boilers comprising Cx−1 hydrocarbons and high boilers comprising Cx+1 hydrocarbons, wherein x is 3 or 4, the process comprising:
- a) separating off at least a portion of the low boilers and separating off at least a portion of the high boilers in a single distillation column, to obtain an intermediate;
- b) removing at least a portion of remaining low boilers and/or at least a portion of remaining high boilers from the intermediate obtained from a) by sorption in a sorption unit, to obtain a purified hydrocarbon stream containing more than 98% by weight of the Cx alkane,
- wherein the sorption in b) is conducted in the presence of hydrogen, and
- wherein a hydrogenation of at least a portion of olefins present additionally takes place in the sorption unit.
Dependencies are inferred from the claim text.