Metal, sulfur and nitrogen removal from hydrocarbons utilizing moving-bed reactors

Claim 2

A PROCESS FOR THE CATALYTIC HYDROPROCESSING OF HYDROCARBONS CONTAINING METAL, SULFUR AND NITROGEN IMPURITIES THEREIN, SAID PROCESS HAVING AT LEAST TWO MOVING-BED REACTORS OPERATE WITH SERIES HYDROCARBON FLOW WHICH COMPRISES THE STEPS OF: A. PASSING A HYDROCARBON CHARGE STOCK AND HYDROGEN THROUGH A FIRST MOVING-BED REACTION ZONE TO CONTACT REGENERATED CATALYST HEREINAFTER DESCRIBED, SAID CATALYST FLOWING DOWNWARD IN SAID FIRST REACTION ZONE TO REMOVE METAL IMPURITIES FROM SAID CHARGE STOCK, B. PASSING A PORTION OF THE REACTION EFFUENT FROM THE FIRST REACTION ZONE TO THE TOP OF A SECOND MOVING-BED REACTION ZONE TO CONTAFCT THEREIN FRESH CATALYST FLOWING DOWNWARD IN SAID SECOND REACTION ZONE TO REMOVE SULFUR AND NITRO-15 GEN IMPURITIES FROM SAID EFFUENT, C. REMOVING USED CATALYST FROM THE BOTTOM OF SAID SECOND REACTION ZONE, D. CONTACTING SAID USED CATALYST WITH AN OXYGEN-CONTAINING GAS IN A REGENERATION ZONE TO BURN OFF ACCUMULATED CAR-30 BON DEPOSITS TO FORM REGENERATED CATALYST, E. PASSING REGENERATED CATALYST FORMED IN STEP (D) INTO SAID FIRST REACTION ZONE AS SAID REGENERATED CATALYST OF STEP (A), AND, F. WITHDRAWING SAID REGENERATED CAFTALYST CONTAINING SAID METAL IMPURITIES FROM THE BOTTOM OF SAID FIRST REACTION ZONE.

Claim 3

A process for the catalytic hydroprocessing of hydrocarbons containing metal, sulfur and nitrogen impurities therein, said process having at least two moving-bed reactors operated with series hydrocarbon flow which comprises the steps of: a. passing a hydrocarbon charge stock and hydrogen through a first moving-bed reaction zone to contact regenerated catalyst hereinafter described, said catalyst flowing downward in said first reaction zone to remove metal impurities from said charge stock; b. passing a portion of the reaction effluent from the first reaction zone to the top of a second moving-bed reaction zone to contact therein fresh catalyst flowing downward in said second reaction zone to remove sulfur and nitrogen impurities from said effluent; c. removing used catalyst from the bottom of said second reaction zone; d. contacting said used catalyst with an oxygen-containing gas in a regeneration zone to burn off accumulated carbon deposits to form regenerated catalyst; e. passing regenerated catalyst formed in step (d) into said first reaction zone as said regenerated catalyst of step (a); and, f. withdrawing spent catalyst from the bottom of said first reaction zone.

Claim 4

A process for the catalytic hydroprocessing of hydrocarbons containing metal, sulfur and nitrogen impurities therein, said process having at least two moving-bed reactors operated with series hydrocarbon flow which comprises the steps of: a. passing a hydrocarbon charge stock and hydrogen through a first moving-bed reaction zone to contact regenerated catalyst hereinafter described, said catalyst flowing downward in said first reaction zone to remove metal impurities from said charge stock; b. passing a portion of the reaction effluent from the first reaction zone to the top of a second moving-bed reaction zone to contact therein fresh catalyst flowing downward in said second reaction zone to remove sulfur and nitrogen impurities from said effluent; c. removing used catalyst from the bottom of said second reaction zone; d. contacting said used catalyst with an oxygen-containing gas in a regeneration zone to burn off accumulated carbon deposits to form regenerated catalyst; e. passing regenerated catalyst formed in step (d) into said first reaction zone as said regenerated catalyst of step (a); and, f. withdrawing spent catalyst from the bottom of said first reaction zone.

Claim 5

A process for the catalytic hydroprocessing of hydrocarbons containing metal, sulfur and nitrogen impurities therein, said process using at least two moving-bed reactors operated in series hydrocarbon flow, which comprises the steps of: a. passing a hydrocarbon charge stock and hydrogen through a first moving-bed reaction zone to contact regenerated catalyst hereinafter described, said catalyst flowing downward in said first reaction zone to remove metal impurities from said charge stock; b. passing a portion of the reaction effluent from the first reaction zone to the top of a second moving-bed reaction zone to contact therein a mixture of fresh and regenerated catalyst flowing downward in said second reaction zone to remove sulfur and nitrogen impurities from said effluent; c. removing used catalyst from the bottom of said second reaction zone; d. contacting said used catalyst with an oxygen-containing gas to burn off accumulated carbon deposits to form regenerated catalyst in a regeneration zone; e. passing a portion of said regenerated catalyst formed in step (d) into said first reaction zone as said regenerated catalyst of step (a); f. passing a portion of said regenerated catalyst formed in step (d) into said second reaction zone; and, g. withdrawing spent catalyst from the bottom of said first reaction zone.

Claim 6

A process for the catalytic hydroprocessing of hydrocarbons containing metal, sulfur and nitrogen impurities therein, said process using at least two moving-bed reactors operated in series hydrocarbon flow, which comprises the steps of: a. passing a hydrocarbon charge stock and hydrogen through a first moving-bed reaction zone to contact regenerated catalyst hereinafter described, said catalyst flowing downward in said first reaction zone to remove metal impurities from said charge stock; b. passing a portion of the reaction effluent from the first reaction zone to the top of a second moving-bed reaction zone to contact therein a mixture of fresh and regenerated catalyst flowing downward in said second reaction zone to remove sulfur and nitrogen impurities from said effluent; c. removing used catalyst from the bottom of said second reaction zone; d. contacting said used catalyst with an oxygen-containing gas to burn off accumulated carbon deposits to form regenerated catalyst in a regeneration zone; e. passing a portion of said regenerated catalyst formed in step (d) into said first reaction zone as said regenerated catalyst of step (a); f. passing a portion of said regenerated catalyst formed in step (d) into said second reaction zone; and, g. withdrawing spent catalyst from the bottom of said first reaction zone.

Claim 7

A process for the catalytic hydroprocessing of hydrocarbons containing metal, sulfur and nitrogen impurities therein, said process using at least two moving-bed reactors operated in series hydrocarbon flow, which comprises the steps of: a. passing a hydrocarbon charge stock and hydrogen through a first moving-bed reaction zone to contact regenerated catalyst hereinafter described, said catalyst flowing downward in said first reaction zone to remove metal impurities from said charge stock; b. passing a portion of the reaction effluent from the first reaction zone to the top of a second moving-bed reaction zone to contact therein a mixture of fresh and regenerated catalyst flowing downward in said second reaction zone to remove sulfur and nitrogen impurities from said effluent; c. removing used catalyst from the bottom of said second reaction zone; d. contacting said used catalyst with an oxygen-containing gas to burn off accumulated carbon deposits to form regenerated catalyst in a regeneration zone; e. passing a portion of said regenerated catalyst formed in step (d) into said first reaction zone as said regenerated catalyst of step (a); f. passing a portion of said regenerated catalyst formed in step (d) into said second reaction zone; and, g. withdrawing said regenerated catalyst containing said metal impurities from the bottom of said first reaction zone.

Claim 8

A process for the catalytic hydroprocessing of hydrocarbons containing metal, sulfur and nitrogen impurities therein, said process using at least two moving-bed reactors operated in series hydrocarbon flow, which comprises the steps of: a. passing a hydrocarbon charge stock and hydrogen through a first moving-bed reaction zone to contact regenerated catalyst hereinafter described, said catalyst flowing downward in said first reaction zone to remove metal impurities from said charge stock; b. passing a portion of the reaction effluent from the first reaction zone to the top of a second moving-bed reaction zone to contact therein a mixture of fresh and regenerated catalyst flowing downward in said second reaction zone to remove sulfur and nitrogen impurities from said effluent; c. removing used catalyst from the bottom of said second reaction zone; d. contacting said used catalyst with an oxygen-containing gas to burn off accumulated carbon deposits to form regenerated catalyst in a regeneration zone; e. passing a portion of said regenerated catalyst formed in step (d) into said first reaction zone as said regenerated catalyst of step (a); f. passing a portion of said regenerated catalyst formed in step (d) into said second reaction zone; and, g. withdrawing said regenerated catalyst containing said metal impurities from the bottom of said first reaction zone.