FIELD: chemistry.
SUBSTANCE: invention relates to a method for removing arsenic from a hydrocarbon feedstock which is at least partially liquid at ambient temperature and atmospheric pressure, comprising at least the following steps: a) bringing the hydrocarbon feedstock and hydrogen into contact with a first capture mass comprising a support and at least one metal M1 from group VIB and at least two metals M2 and M3 from group VIII, where metal M1 is molybdenum, metal M2 is cobalt and metal M3 is nickel; b) bringing the hydrocarbon feedstock and hydrogen into contact with a second capture mass in sulphide form comprising a support and nickel, the second capture mass comprising an amount of nickel in the range of from 5 to 50% by weight of NiO, based on the total weight of the second capture mass in oxide form before sulphonation. Contact at step a) is carried out at a temperature in the range of 30°C to 400°C, pressure in the range of 0.2 to 5 MPa, hourly space velocity with respect to the volume of the first capture mass, in the range of 4 to 50 h-1 and with hydrogen consumption in the range of 2 to 800 litres per litre of feedstock; the molar ratio of metals (M2 + M3)/M1 is in the range of 1 to 6, the amount of metal M1 of group VIB in oxide form is in the range of 3 to 14 wt%, based on the total weight of the first capture mass, the amount of metal M2 of group VIII in oxide form is in the range of 1 to 20 wt%, based on the total weight of the first capture mass, and the amount of metal M3 of group VIII in oxide form ranges from 5 to 28 wt%, based on the total weight of the first capture mass. Contact at step b) is carried out at a temperature in the range of 30°C to 400°C, pressure in the range of 0.2 to 5 MPa, hourly space velocity with respect to the volume of the second capture mass in the range of 4 to 50 h-1 and with hydrogen consumption in the range of 2 to 800 litres per litre, and step a) is carried out either before step b) or simultaneously with step b).
EFFECT: removal of arsenic from hydrocarbon feedstock.
11 cl, 2 tbl, 2 ex
