Process for simultaneous removal of arsenic and sulphur from hydrocarbon streams
AssigneePetroleo Brasileiro S.A. - Petrobras
InventorsWladmir Ferraz De Souza, Marcus Vinicius Eiffle Duarte, Lilian Ernst, Carmen Lucia Tavares Da Silva
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Abstract
The present invention describes a process for the simultaneous removal of arsenic and sulphur compounds from hydrocarbon streams of fossil origin, wherein hydrocarbon streams of fossil origin resulting from the retorting process of schist are purified by direct contact with hydrated iron oxide, such as goethite (α-FeOOH) in its raw natural form (limonite ore particles).
Claims14
A process for simultaneous removal of arsenic and sulphur from hydrocarbon streams, comprising the steps of
- a) grinding schist rock contaminated with arsenic and sulphur to obtain particles of schist rock;
- b) removing the arsenic and sulphur from the particles of schist rock by
- b1) mixing the particles of schist rock with particles of hydrated iron oxide (FeOOH) in a schist:FeOOH ratio, by weight, in the range from 100:1 to 1:100 and
- b2) pyrolyzing the mixture obtained in step b1) with heating from ambient temperature to a temperature in the range 400-600° C.,
- wherein the process takes place in the absence of hydrogen partial pressure and at atmospheric pressure.
A process for simultaneous removal of arsenic and sulphur from hydrocarbon streams, comprising the steps of
- a) extruding paste of limonite ore particles, followed by drying;
- and
- b) removing arsenic and sulphur from a hydrocarbon stream contaminated with arsenic and sulphur by passing the hydrocarbon stream through the bed obtained in a) at a temperature of at least 80° C., varying up to 420° C.,
- wherein the process takes place in the absence of hydrogen partial pressure and at atmospheric pressure.
Dependencies are inferred from the claim text.