The method of obtaining petroleum fuels with improved environmental characteristics

 

(57) Abstract:

We propose a method of extracting petroleum fuels with improved environmental characteristics in the presence of alumina catalysts, pre-activated elementary sulfur, characterized in that the package alumina catalysts is at least 50% aluminoborosilicate catalyst containing molybdenum oxide 12 to 18 wt.%, oxide of cobalt, 3 to 6 wt.%, obtained by mixing with a suspension of cobalt molybdate in the hydrogen peroxide solution, aluminium hydroxide, treated with nitric acid in two steps - the first part of the aluminium hydroxide is treated with concentrated nitric acid for 0.5 - 2.0 hours at 20 - 80oC and a molar ratio of the aluminum hydroxide: nitric acid(1: 0,64) - (1: 1,92), and then the obtained product of the interaction of aluminium hydroxide with nitric acid is mixed with the rest of aluminium hydroxide at 20 - 80oC and the mass ratio of the product : aluminium hydroxide in terms of alumina (1.5 to 3.0) : 100, followed by forming, drying and calcination of the obtained product, the second component of the catalytic system is aluminumalloy catalyst. 3 CCI.

Known methods of Hydrotreating of petroleum distillates in the medium of hydrogen using Ecumenical and aluminoborosilicate catalysts [1-3]

The closest in technical essence and the achieved effect is way hydrodesulphurization unit of hydrocarbons in the presence of pre-solifidian catalysts containing Nickel and molybdenum, cobalt and molybdenum [4]

The disadvantage of this method is insufficient hydrofining produced during the hydrotreatment of petroleum fractions.

The purpose of the invention obtaining the hydrogenated feed is separated middle distillate fractions with sulfur content not more than 0.05 wt. aromatic hydrocarbons of not more than 20 wt.

This goal is achieved by a method of obtaining petroleum fuels with improved environmental characteristics by hydrodesulphurization unit of hydrocarbons in the presence of alumina catalysts, pre-activated elementary sulfur, provided that the process is conducted in the presence of aluminoborosilicate catalyst composition, wt. molybdenum oxide 12,0 18,0, cobalt oxide 3,0 6,0 obtained by mixing with a suspension of cobalt molybdate in solution of hydrogen peroxide of haste aluminium hydroxide with concentrated nitric acid for 0.5 to 2.0 hours at 20 80oC, molar ratio of the aluminum hydroxide nitric acid (1 0,64) (1 1,92) in the first stage and the mixing product of the interaction of aluminium hydroxide with nitric acid with the rest of aluminium hydroxide at 20 80oC, the mass ratio of the product aluminium hydroxide in terms of alumina (1.5 to 3.0) 100 in the second stage, followed by shaping, drying and calcining the resulting product, or in the presence of a catalytic system containing at least 50 wt. aluminoborosilicate catalyst of specified composition and received the agreed way and alumnirelations catalyst.

The hallmark of the invention is that the process is conducted in the presence of aluminoborosilicate catalyst composition, wt. molybdenum oxide 12,0 18,0, cobalt oxide 3,0 6,0 obtained by mixing with a suspension of cobalt molybdate in the hydrogen peroxide solution, aluminium hydroxide, pre-treated with nitric acid in two stages - the initial processing parts of aluminium hydroxide with concentrated nitric acid for 0.5 to 2.0 hours at 20 80oC, molar ratio of the aluminum hydroxide nitric acid (1 0,64) (1 1,92) in the first stage and smashin the 80 and 20oC, the mass ratio of the product aluminium hydroxide in terms of alumina (1.5 to 3.0) 100 in the second stage, followed by shaping, drying and calcining the resulting product, or in the presence of a catalytic system containing at least 50 wt. aluminoborosilicate catalyst of specified composition and received the agreed way and alumnirelations catalyst.

Used in the Hydrotreating process aluminoborosilicate catalyst obtained as described above, increases the degree of conversion of sulfur-containing compounds and saturation of aromatic hydrocarbons by obtaining aluminum oxide with a specific acid-basic properties and distribution of active ingredients that contribute to getting on the catalyst surface the optimal number of active sites responsible for the reactions of hydrodesulphurization unit and dearomatization.

The use of a catalytic system consisting of allocability alumonickelsilicate catalysts, valid when the content in the raw material is high (above 25 wt.) aromatic hydrocarbons, since the use of such a catalytic system creates a synergistic effect is Ogii unknown.

Examples.

Tests of the invention were conducted on three samples of raw materials, the main characteristics of which are given in table. 1.

Tests were conducted on samples aluminoborosilicate catalysts synthesized in accordance with the proposed formula of the invention listed in table. 2. When using the catalytic system was applied aluminumalloy catalyst containing molybdenum oxide 18 wt. Nickel oxide 6 wt. The Hydrotreating process was carried out at 360oC, hydrogen pressure of 3.0 MPa.

Direct catalytic composition of the package with the indication used for Hydrotreating raw settings Hydrotreating and quality of the obtained hydrogenated feed is separated in examples 1 to 7 shown in table. 3. In this same table shows the sulfur content in the resulting product, as well as similar data for carrying out the process in a known manner (example 7). Examples 1, 2 and 6 are made in accordance with the proposed invention. Examples 3, 4 and 5 shows how the beyond.

Implementation of a prototype in the form of raw materials such results does not. Change ratio Ecumenical and aluminoborosilicate catalysts, technology prigot"ptx2">

The method of obtaining petroleum fuels with improved environmental characteristics by hydrodesulphurization unit of hydrocarbons in the presence of alumina catalysts, pre-activated elemental sulfur, wherein the process is conducted in the presence of aluminoborosilicate catalyst composition, wt.

Molybdenum oxide 12 18

The cobalt oxide 3 6

obtained by mixing with a suspension of cobalt molybdate in the hydrogen peroxide solution, aluminium hydroxide, pre-treated with nitric acid in two stages: initial processing parts of aluminium hydroxide with concentrated nitric acid for 0.5 to 2.0 hours at 20 80oWith a molar ratio of the aluminum hydroxide nitric acid 1 0,64 1,92 in the first stage and the mixing product of the interaction of aluminium hydroxide with nitric acid with the rest of aluminium hydroxide at 20 80oWith, the mass ratio of the product: aluminium hydroxide in terms of aluminum oxide 1,5 3,0 100 at the second stage, followed by molding, drying, and annealing the resulting product in the presence of a catalytic system containing at least 50 wt. aluminosilicates catalyst is

 

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4 tbl, 3 ex

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2 cl, 1 tbl, 3 ex

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