Process and catalyst for removal arsenic and one or more other metal compounds from a hydrocarbon feedstock

Abstract

The invention pertains to a process and catalyst for removing arsenic and one or more other metal compounds, e.g. silicon, vanadium and nickel, from a hydrocarbon feedstock. The catalyst comprises a molybdenum compound and a nickel compound on a carrier. The catalyst has a surface area of at least 200 m 2 /g. Next to contaminant removal, the catalyst is also suitable for hydrodesulphurisation, hydrodenitrogenation and/or hydrogenation.

1 . A process for removing arsenic and one or more other metal compounds from a hydrocarbon feed, in which a hydrocarbon feed containing at least 20 ppb of arsenic and at least 0.3 ppm of the other metal compounds is contacted in the presence of hydrogen with a catalyst composition comprising a molybdenum compound and a nickel compound on a carrier, wherein the molybdenum compound is present in an amount of 6-18 wt. %, calculated as trioxide and the nickel compound is present in 10 an amount of 6-20 wt. %, calculated as oxide, and wherein the catalyst composition has a surface area of at least 200 m 2 /g.  
   
   
       2 . The process of  claim 1  wherein the molybdenum compound is present in an amount of 10-15 wt. %, calculated as trioxide and the nickel compound is present in an amount of 8-15 wt. %, calculated a oxide.  
   
   
       3 . The process of  claim 1  or  2  wherein the catalyst composition has an MPD of at least 9 nm, preferably between 9 and 15 nm.  
   
   
       4 . The process according to any one of the preceding claims wherein one of the other metal compounds is silicon.  
   
   
       5 . The process of any one of the preceding claims wherein the feed is a naphtha type feed which has an arsenic content of at least 20 ppb (weight parts per billion) of arsenic, preferably between 0.02 and 2 ppm, an initial boiling point of about 0-120° C., preferably about 30-90° C. and a final boiling point of about 150-250° C., preferably about 160-220° C.  
   
   
       6 . The process of  claim 5 , wherein the naphtha type feed has a silicon content of at least 0.5 ppm, specifically between 1 ppm and 100 ppm.  
   
   
       7 . The process of any one of the preceding claims which is carried out at a hydrogen partial pressure of 10-200 bar, preferably 30-150 bar, a temperature of 200-480° C., preferably 300-415° C., a hydrogen to feed ratio of 200-2000 NI/I, preferably 500-1000 NI/I, and a LHSV of 0.1-10 h −1 , preferably 0.5-3 h −1 .  
   
   
       8 . A hydroprocessing catalyst comprising a molybdenum compound and a nickel compound on a carrier, wherein the molybdenum compound is present in an amount of 6-18 wt. %, calculated as oxide and the nickel compound is present in an amount of 6-20 wt. %, calculated as oxide, wherein the catalyst has a surface area of at least 200 m 2 /g.  
   
   
       9 . A hydroprocessing catalyst according to  claim 8  wherein the catalyst has an MPD of at least 9 nm, preferably between 9 and 15 nm.