Multi-stage process for producing high ur oil by hydrogenation

Abstract

Abstract REFINED MINERAL OILS (USEFUL AS TEXTILE OILS, WHITE OILS AND AGRICULTURAL SPRAY OILS) WHICH HAVE A VISCOSITY IN THE LUBRICATING OIL RANGE AND A VOLUME PRECENT UNSULFONATED RESIDUE (UR) OF AT LEAST 94.5 8TYPICALLY AT LEAST 96) ARE PRODUCED FROM A DEWAXED RAFFINATE OF A DISTILLATE OIL, PREFERABLY A SUBSTANTIALLLY WAX-FREE DISTILLATE, OBTAINED FROM A CRUDE OIL CLASSIFIED AS PARAFFINIC OR MIXED-BASE BY ASTM VISCOSITY-GRAVITY CONSTANT (VGC). ONE PREFERRED DISTILLATE IS A DE-WAXED RAFFINATE HAVING A UR LESS THAN 93. A PREFFERED PROCESS OFR PRODUCING SUCH A REFINED MINERAL OIL (WITH A UR OF AT LEAST 96) COMPRISES (A) INTRODUCING A MINERAL OIL DISTILLATE OF LUBRICATING VISCOSITY INTO A REACTION VESSEL CONTAINING A FIRST REACTION ZONE, A SECOND REACTION ZONE AND AN INTERMEDIATE ZONE BETWEEN SAID FIRST AND SAID SECOND REACTION ZONES; (B) CONTACTING SAID DISTILLATE IN SAID FIRST ZONE WITH A HYDROCARBON-RICH GAS AND A CATALYTIC AMOUNT OF A SULFUR-RESISTANT HYDROGENATION CATALYST TO DESULFURIZE SAID DISTILLATE; (C) PASSING THE DISTILLATE FROM SAID FIRST ZONE TO SAID INTERMEDIATE ZONE CONTAINING THEREIN A PACKING MATERIAL WHICH IS SUBSTANTIALLY INERT TO HYDROGENATION AND WHEREIN THE FLOW OF HYDROGEN IS COUNTERCURRENT TO THE FLOW OF DISTILLATE WHEREBY HYDROGEN SULFIDE WHICH WAS FORMED IN SAID FIRST ZONE IS STRIPPED FROM SAID DISTILLATE; (D) CONTACTING THE DESULFURIZED DISTILLATE IN SAID SECOND ZONE WITH HYDROGEN AND A HYDROGENATION CATALYST; (E) SAID CONDUCTED AT A TEMPERATURE OF SAID SE AID SECOND ZONES BEING CONDUCTED AT A TEMPERATURE OF ABOUT 550 TO 750* F. AND A PRESSURE IN THE RANGE OF 5006000 P.S.I.G.; AND (F) WITHDRAWING MINERAL OIL PRODUCT FROM SAID SECOND ZONE HAVING AN UNSULFONATABLE RESIDUE OF AT LEAST 96.

Inventors

• 👤 M Kirk

Bibliographic Details