Hydrotreating catalyst sulphiding agent and its use for in situ and ex situ presulphidation

Abstract

The present invention relates to a sulphiding agent for a hydrotreating catalyst which makes possible faster sulphiding of the catalyst but which also makes possible to very significantly limit solid deposits, in particular of sulphur. The sulphiding agent according to the invention is essentially composed of diethyl disulphide (DEDS) or dipropyl disulphide(s) (DPDS) or dibutyl disulphide(s) (DBDS) and can be employed in “in situ” and “ex situ” presulphidation processes.

1 . Hydrotreating catalyst sulphiding agent, the catalyst including a support based on at least one oxide of a metal or of a semimetal and at least one active metal, characterized in that the sulphiding agent comprises a disulphide chosen from diethyl disulphide (DEDS), dipropyl disulphide(s) (DPDS) or dibutyl disulphide(s) (DBDS). 
     
     
         2 . Sulphiding agent according to  claim 1 , consisting essentially of DEDS. 
     
     
         3 . Sulphiding agent according to  claim 1 , consisting essentially of DPDS. 
     
     
         4 . Sulphiding agent according to  claim 1 , consisting essentially of DBDS. 
     
     
         5 . Sulphiding agent according to  claim 1 , characterized in that it comprises up to 20 000 ppm of impurities. 
     
     
         6 . Sulphiding agent according to  claim 1 , characterized in that it comprises at least one odour-masking agent and/or one scenting base. 
     
     
         7 . Sulphiding agent according to  claim 1 , characterized in that it comprises up to 1% by weight of at least one odour-masking agent and/or one scenting base of the total weight of the sulphiding agent. 
     
     
         8 . Catalyst presulphidation process, the catalyst including a support based on at least one oxide of a metal or of a semimetal and at least one active metal, characterized in that the sulphiding agent is as defined in  claim 1 . 
     
     
         9 . Catalyst presulphidation process according to  claim 14 , in which the presulphidation is carried out ex situ. 
     
     
         10 . Catalyst presulphidation process according to  claim 14 , in which the presulphidation is carried out in situ. 
     
     
         11 . Sulphiding agent according to  claim 1 , characterized in that it comprises up to 10 000 ppm of impurities. 
     
     
         12 . Sulphiding agent according to  claim 1 , characterized in that it comprises up to 5000 ppm of impurities. 
     
     
         13 . Sulphiding agent according to  claim 1 , characterized in that it comprises from 0.1 to 0.5% by weight of at least one odour-masking agent and/or one scenting base of the total weight of the sulphiding agent. 
     
     
         14 . A catalyst presulphidation process wherein a catalyst including a support based on at least one oxide of a metal or of a semimetal and at least one active metal is contacted with a sulphiding agent chosen from diethyl disulphide (DEDS), dipropyl disulphide(s) (DPDS) or dibutyl disulphide(s) (DBDS).