Hydrodenitrification catalyst and process

The process of claim i wherein the silicon compound is in the form of a liquid having a viscosity of less than about 100 cSt (measured at 40.degree. C.).

In a hydrotreating catalyst comprising a hydrogenating metal component selected from nickel, molybdenum and mixtures thereof supported on an alumina support, the improvement which comprises impregnating said hydrogenating metal component supported on alumina with a liquid form of a silicon compound having the general formula ##STR6## wherein U, V, W, X, Y, and Z can individually be --R or --SiH.sub.3, R being either hydrogen, or an alkyl, cycloalkyl, aromatic, alkyl aromatic, alkylcycloalkyl radical having from 1 to 30 carbon atoms, and "a" being a whole number in the range of from 5 to 60, in an amount sufficient to deposit from about 2 percent to about 8 percent by weight of the total catalyst of Si, and subsequently calcining said impregnated catalyst at a temperature ranging from about 300.degree. C. to about 600.degree. C. in an oxidizing atmosphere.

A process for improving the hydrodenitrification activity of a hydrotreating catalyst which comprises a hydrogenating metal component selected from the group consisting of nickel, molybdenum and mixtures thereof supported on an alumina support, said process comprising impregnating said hydrogenating metal component supported on alumina with a liquid form of a silicon compound having the general formula ##STR7## wherein U, V, W, X, Y, and Z can individually be --R or --SiH.sub.3, R being either hydrogen, or an alkyl, cycloalkyl, aromatic, alkyl aromatic, alkylcycloalkyl radical having from 1 to 30 carbon atoms, and "a" being a whole number in the range of from 5 to 60, in an amount sufficient to deposit from about 2 percent to about 8 percent by weight of the total catalyst of Si, and subsequently calcining said impregnated catalyst at a temperature ranging from about 300.degree. C. to about 600.degree. C. in an oxidizing atmosphere.

In a hydrofining process which hydrogenates nitrogen-containing hydrocarbons in a hydrocarbon feedstock which comprises contacting at hydrofining conditions said feed stock and hydrogen with a catalyst comprising a hydrogenating metal component selected from nickel, molybdenum and mixtures thereof supported on an alumina support, the improvement which comprises using as catalyst said hydrogenating metal component supported on alumina which has been modified by impregnating said hydrogenating metal component supported on alumina with a liquid form of a silicon compound having the general formula ##STR8## wherein U, V, W, X, Y, and Z is --R or --OR, R being either hydrogen, or an alkyl, cycloalkyl, or alkylcycloalkyl radical having from 1 to 30 carbon atoms and "a" being a whole number in the range of from 5 to 60, in an amount sufficient to deposit from about 3 to about 6 percent by weight of the total catalyst of Si, and subsequently calcining said impregnated catalyst at a temperature ranging from about 300.degree. C. to about 600.degree. C. in an oxidizing atmosphere.

In a hydrotreating catalyst comprising a hydrogenating metal component selected from nickel, molybdenum and mixtures thereof supported on an alumina support, the improvement which comprises impregnating said hydrogenating metal component supported on alumina with a liquid form of a silicon compound having the general formula ##STR9## wherein U, V, W, X, Y, and Z is --R, R being either hydrogen, or an alkyl, cycloalkyl, alkylcycloalkyl radical having from 1 to 30 carbon atoms, and "a" being a whole numbers in the range of from 5 to 60, in an amount sufficient to deposit from about 3 to about 6 percent by weight of the total catalyst of Si, and subsequently calcining said impregnated catalyst at a temperature ranging from about 300.degree. C. to about 600.degree. C. in an oxidizing atmosphere.

A method for improving the hydrodenitrification activity of a hydrotreating catalyst which comprises a hydrogenating metal component selected from the group consisting of nickel, molybdenum and mixtures thereof supported on an alumina support, said method comprising impregnating said hydrogenating metal component supported on alumina with a liquid form of a silicon compound having the general formula ##STR10## wherein U, V, W, X, Y, and Z is --R, R being either hydrogen, or an alkyl, cycloalkyl, alkylcycloalkyl radical having from 1 to 30 carbon atoms, and "a" being a whole number in the range of from 5 to 60, in an amount sufficient to deposit from about 3 to about 6 percent by weight of the total catalyst of Si, and subsequently calcining said impregnated catalyst at a temperature ranging from about 300.degree. C. to about 600.degree. C. in an oxidizing atmosphere.