Catalytic composition for hydrotreating of hydrocarbons and method for hydrotreating

Abstract

A catalytic composition for hydrotreating of hydrocarbons in which a metallic component for hydrogenation is carried on a carrier comprising zeolite Y with aluminum and titanium inserted therein and a porous inorganic oxide, the zeolite Y having the following characteristics: (a) unit cell dimension (UD) in a range from 24.25 to 24.60 Å, (b) crystallinity of 95% or more, (c) specific surface area (SA) of 500 m2 / g or more, (d) total pore volume (PVt) of a group of pores each having a diameter of 600 Å or below in a range from 0.45 to 0.70 ml / g, (e) pore volume (PVm) of a group of pores each having a diameter in a range from 100 to 600 Å in a range from 0.10 to 0.40 ml / g, (f) pore volume (PVs) of a group of pores each having a diameter in a range from 35 to 50 Å in a range 0.03 to 0.15 ml / g, and (g) percentage of 4-coordinate aluminum atoms against total aluminum atoms in the zeolite of 60 atom % or more.

Description

TECHNICAL FIELD[0001]The present invention relates to catalytic compositions for hydrotreating of hydrocarbons and a method of hydrotreating. More specifically, this invention relates to catalytic compositions for hydrotreating hydrocarbons by using aluminum- and titanium-inserted zeolite Y, and a method for hydrotreating hydrocarbons. When used in hydrotreating of hydrocarbons such as a deasphalted oil (described as DAO hereinafter), the zeolite Y shows high hydrocracking capability for high boiling point fractions, high hydrogenating capability, excellent selectivity for middle fractions, and high desulfurizing and high denitrogenating capability. Furthermore the zeolite provides excellent effects such as a high gasoline yield and a low production rate of coke and hydrogen when the obtained uncracked bottom oil is used as a feed oil for catalytic cracking.TECHNICAL BACKGROUND[0002]Because the zeolite Y is a solid acid having acidity, the zeolite Y is used as solid acid catalyst in...

AI Technical Summary

Benefits of technology

The present invention provides a catalytic composition for hydrotreating of hydrocarbons that uses aluminum- and titanium-inserted zeolite Y with specific characteristics. This catalytic composition has excellent properties such as high hydrocracking capability, high hydrogenating capability, high desulfurizing capability, and high yield of gasoline, kerosene, or light oil fractions. The aluminum- and titanium-inserted zeolite Y has specific characteristics such as a high percentage of 4-coordinate aluminum atoms, a ratio of pore volume of a group of pores having a diameter in a range from 100 to 600 Å (PVm) to the total pore volume of a group of pores having a diameter in a range from UD to 70 ml / g, a ratio of pore volume of a group of pores having a diameter in a range from 350 to 50 Å (PVs) to the pore volume of a group of pores having a diameter in a range from OO to 70 ml / g, and a ratio of pore volume of a group of pores having a diameter in a range from OO to 350 Å (PVs) to the pore volume of a group of pores having a diameter in a range from UD to 70 ml / g. The aluminum- and titanium-inserted zeolite Y has excellent properties for hydrotreating of high boiling point fractions, high hydrogenating capability, and high desulfurizing capability. The catalytic composition also has high yields of gasoline, kerosene, or light oil fractions.

Problems solved by technology

In the method, however, there is the problem that, because the feed USY is treated with an alkaline aqueous solution with the pH in the range from 11 to 12, crystallinity of the obtained zeolite is low.

Because of the problem, when the zeolite is used for hydrotreating of hydrocarbons, an amount of a solid acid as a catalytically active point in the zeolite is small, and high cracking capability can not be obtained disadvantageously.

Because of the features as described above, when the zeolite is used for hydrotreating of hydrocarbons, the heavy hydrocarbons are not sufficiently cracked, and the selectivity for middle fractions is disadvantageously low, and there is the need for overcoming the problems as described above.

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