Process for removing a silicon compound from a hydrocarbon stream, wherein the process comprises the following stages: a) activating an adsorbent by contacting it with H 2 O and CO 2 at a temperature from 80°C to 360°C, preferably from 110°C to 220°C, more preferably 120°C to 160°C and pressure from 0.05 to 5.0 MPa g, preferably 0.05 to 2.0 MPa g, more preferably from 0.05 to 0.2 MPa g, wherein said adsorbent comprises a mixture of: a lamellar double hydroxide, preferably hydrotalcite, typically obtainable by mixing oxides of divalent and trivalent metals, preferably MgO and Al 2 O 3, and a group VI-B or group VIII metal; b) contacting a hydrocarbon feed, typically having a content of a silicon compound, with the adsorbent at a temperature from 80°C to 360°C, preferably 160°C to 320°C, more preferably from 220°C to 280°C, at a pressure in the range from 0.5 to 5.0 MPa g, preferably from 1.5 to 3.0 MPa g, and wherein the conditions are, typically, maintainable by or for a H 2 /feed ratio from 10 to 1000 Nm 3 of gas/m 3 of feed, more preferably from 50 to 500 Nm 3 of gas/m 3 of feed, and a space velocity LHSV from 1 to 20h -1, preferably from 2 to 5h -1; c) maintaining said adsorbent in the condition of lamellar mixed hydroxide, by continuous addition of H 2 O, wherein the H 2 O flow rate is from 0.01% to 100%, preferably 0.1% to 20%, more preferably 0.1% to 10% of the volume of the hydrocarbon feed being processed; d) recovering a hydrocarbon stream, which is either free from silicon compounds or has a content of a silicon compound that is less than that of the hydrocarbon feed. a) activating an adsorbent by contacting it with H 2 O and CO 2 at a temperature from 80°C to 360°C, preferably from 110°C to 220°C, more preferably 120°C to 160°C and pressure from 0.05 to 5.0 MPa g, preferably 0.05 to 2.0 MPa g, more preferably from 0.05 to 0.2 MPa g, wherein said adsorbent comprises a mixture of: a lamellar double hydroxide, preferably hydrotalcite, typically obtainable by mixing oxides of divalent and trivalent metals, preferably MgO and Al 2 O 3, and a group VI-B or group VIII metal; a lamellar double hydroxide, preferably hydrotalcite, typically obtainable by mixing oxides of divalent and trivalent metals, preferably MgO and Al 2 O 3, and a group VI-B or group VIII metal; b) contacting a hydrocarbon feed, typically having a content of a silicon compound, with the adsorbent at a temperature from 80°C to 360°C, preferably 160°C to 320°C, more preferably from 220°C to 280°C, at a pressure in the range from 0.5 to 5.0 MPa g, preferably from 1.5 to 3.0 MPa g, and wherein the conditions are, typically, maintainable by or for a H 2 /feed ratio from 10 to 1000 Nm 3 of gas/m 3 of feed, more preferably from 50 to 500 Nm 3 of gas/m 3 of feed, and a space velocity LHSV from 1 to 20h -1, preferably from 2 to 5h -1; c) maintaining said adsorbent in the condition of lamellar mixed hydroxide, by continuous addition of H 2 O, wherein the H 2 O flow rate is from 0.01% to 100%, preferably 0.1% to 20%, more preferably 0.1% to 10% of the volume of the hydrocarbon feed being processed; d) recovering a hydrocarbon stream, which is either free from silicon compounds or has a content of a silicon compound that is less than that of the hydrocarbon feed.