Process for desulfurization without consumption of hydrogen

Abstract

The desulfurization of a hydrocarbon-containing fraction, e.g. kerosene or gas oil that comprises at least one stage of treatment of said fraction with an oxidizing agent in the presence of a catalyst of said oxidation, in which said catalyst comprises at least one oxide of chemical formula MxOy, whereby M is an element that is selected from the group that consists of the elements of groups IV-B, V-B or VI-B of the periodic table.

1 . A process for desulfurization of a hydrocarbon-containing fraction process comprising at least one treatment stage of said fraction with an oxidizing agent in the presence of a catalyst of said oxidation, in which said catalyst is in bulk form and comprises an active phase consisting essentially of at least one metallic oxide of chemical formula M x O y , wherein M is an element that is selected from the group that consists of the elements of groups IV-B, V-B or VI-B of the periodic table.  
     
     
         2 . A process for desulfurization according to  claim 1 , in which said hydrocarbon-containing fraction is a petroleum fraction whose boiling points are between 150 and 500° C.  
     
     
         3 . A process for desulfurization according to  claim 1 , in which said hydrocarbon-containing fraction comprises a fraction by weight of sulfur-containing compounds of between 5 ppm and 5%.  
     
     
         4 . A process for desulfurization according to  claim 1 , in which the temperature of said oxidation reaction is between 40° C. and 300° C.  
     
     
         5 . A process for desulfurization according to  claim 1 , in which the temperature of said oxidation reaction is greater than or equal to 100° C.  
     
     
         6 . A process for desulfurization according to  claim 1 , in which the pressure of said oxidation reaction is between 0.1 and 5 MPa.  
     
     
         7 . A process for desulfurization according to  claim 1 , in which element M is selected from the group that consists of vanadium, chromium, zirconium, molybdenum, tungsten, and titanium, and combination thereof.  
     
     
         8 . A process for desulfurization according to  claim 1 , in which the active phase of said catalyst consists essentially of MoO 3 , V 2 O 5  or ZrO 2  or mixtures thereof.  
     
     
         9 . A process for desulfurization according to  claim 1 , in which said catalyst is used in the form of powder, balls or extrudates.  
     
     
         10 . A process for desulfurization according to  claim 1 , in which said oxidizing agent is selected from the group that consists of peroxides, hydroperoxides, organic peracids, ozone, oxygen, nitrogen oxides and metallic oxidizing agents, by themselves or in a combination.  
     
     
         11 . A process for desulfurization of a sulfur-containing hydrocarbon-containing fraction that comprises at least the following stages: 
 a) an oxidation of at least a portion of the sulfur-containing compounds contained in said hydrocarbon-containing fraction in the presence of at least one oxidizing agent and a catalyst according to  claim 1 ,    b) a separation of the oxidized sulfur-containing compounds of the products obtained from stage a) by extraction, distillation or adsorption.    
     
     
         12 . A process for desulfurization according to  claim 11 , in which stage b) comprises an adsorption step carried out in at least one adsorbent column, wherein said adsorbent is selected from the group consisting of amorphous oxides, amorphous aluminas, amorphous silicas amorphous silica-aluminas, crystallized oxides, zeolites, clays or a mixture of at least two of the adsorbents of said group.  
     
     
         13 . A process for desulfurization according to  claim 11  also comprising a separation stage of said catalyst between oxidation stage a) and separation stage b).  
     
     
         14 . A process according to  claim 1 , wherein the hydrocarbon fraction is kerosene or gas oil.  
     
     
         15 . A process for desulfurization according to  claim 10 , in which the active phase of said catalyst consists essentially of MoO 3 , V 2 O 5  or ZrO 2  or mixtures thereof.  
     
     
         16 . A process according to  claim 15 , wherein the oxidizing agent is hydrogen peroxide tertiary butyl hydroperoxide, or cumene.  
     
     
         17 . A process for desulfurization according to  claim 2 , in which the temperature of said oxidation reaction is greater than or equal to 100° C.  
     
     
         18 . A process for desulfurization according to  claim 8 , in which the temperature of said oxidation reaction is greater than or equal to 100° C.  
     
     
         19 . A process for desulfurization according to  claim 16 , in which the temperature of said oxidation reaction is greater than or equal to 100° C.  
     
     
         20 . A process for desulfurization according to  claim 11 , in which the temperature of said oxidation reaction is greater than or equal to 100° C.  
     
     
         21 . A process according to  claim 1 , wherein the bulk form is in the form of balls, extrudates or powder.  
     
     
         22 . A process according to  claim 19 , wherein the bulk form is in the form of balls, extrudates or powder.  
     
     
         23 . A process according to  claim 20 , wherein the bulk form is in the form of balls, extrudates or powder.  
     
     
         24 . A process according to  claim 11 , wherein the bulk form is powder and the process comprising an intermediate step of removing the powder prior to the adsorption step.  
     
     
         25 . A process according to  claim 11 , wherein water forms during the oxidation step and wherein the process further comprises a step of removing the water before the adsorption step.