The method of obtaining low-sulfur petroleum fractions and products

 

(57) Abstract:

Usage: petrochemistry. The essence of the crude oil is subjected to hydrocide in the presence of packet alumina catalysts containing 20-100%. aluminoborosilicate catalyst obtained on the basis of three-hydrate of aluminum containing oxides, wt.%, no more: of silicon - 0,2, iron - 0,04, potassium and sodium - 0.6, moisture - 12,0. The process is carried out at 350-400oC. 1 table.

The invention relates to the refining, in particular to methods of Hydrotreating petroleum fractions.

There is a method of Hydrotreating a petroleum distillate in an environment of hydrogen at elevated temperature and pressure with the use of Ecumenical or aluminoborosilicate catalysts [1]

The closest in technical essence and the achieved effect is a method of obtaining low-sulfur diesel fuel at elevated temperature and pressure in the presence of the oxide layer aluminoborosilicate catalyst with a diameter of 3.2-4.0 mm in a mixture with elemental sulfur, then in the presence of consecutive layers of oxide zeolite catalyst with a diameter of 2.0 to 3.0 mm and the oxide alumnirelations produce the containing gas at 350-400oC [2]

The disadvantage of this method is insufficient hydrodesulphurization unit diesel fuels in terms of existing hydrotreatment units, as well as the complexity of operation of three-layer package of the catalyst, which differ from each other in composition of the active components. The operation of the catalytic package is only possible when regeneration is not less than 1 time in 8-10 months and the subsequent overload. When uploading this catalytic system in terms of existing industrial installations is inevitable mixture of catalysts. Therefore, to make further loading is necessary to use a fresh batch of catalyst, significantly, about 5 times, reduces the overall lifetime of the catalysts.

The aim of the invention is to increase the depth of hydrofining petroleum fractions in terms of existing industrial installations Hydrotreating.

This goal is achieved by obtaining low-sulfur petroleum fractions and products with sulfur content of no more than: gasoline 0,001% wt. diesel fuels: 0.2% wt. vacuum gasoil feedstock for catalytic cracking of 0.6% wt. by Hydrotreating of crude oil at elevated temperature and Yes rasego gas elemental sulfur or a raw material at a temperature of 350-400oC provided that use package alumina catalysts containing 20-100%. aluminoborosilicate catalyst obtained on the basis of trihydride ammonium containing oxides, wt. no more: silicon 0,2; iron 0,04; potassium and sodium 0,6; water 12,0.

Under the package catalysts refers to a catalytic system consisting of one or more types and brands of catalysts.

The hallmark of the invention is that use package alumina catalysts containing 20-100%. aluminoborosilicate catalyst obtained on the basis of trihydride ammonium containing oxides, wt. no more: silicon 0,2; iron 0,04; potassium and sodium 0,6; water - 12,0.

The use of the catalytic composition of the package is not less than 80% aluminoborosilicate catalyst obtained on the basis of three-hydrate of aluminum given quality, significantly increases the catalytic activity of the package due to the optimum dispersion of the crystal structure and acid-basic properties of the obtained aluminum oxide.

In the known methods of obtaining small-scale oil with the application of the described technology is unknown.

Thus, S="ptx2">

Tests of the invention were conducted on three types of materials:

fraction 70-180oC with a sulfur content of 1.2 wt.

diesel fraction 180-360oC with a sulfur content of 2.0 wt.%

vacuum gas oil with a sulphur content of 2.2 wt.%

The test was subjected to three samples of the catalyst:

1. TH-70 (TU 38.1011111-91) with the content of molybdenum trioxide 14,0% wt. the cobalt oxide 4.5% by weight. the raw material used trihydrate aluminum content wt. oxides: silicon 0,16, iron 0,038, potassium and sodium - 0,53; moisture 11,8 obtained from Pikalyovo alumina.

2. TH-86 (TU 38.40132-88) with the content of molybdenum trioxide to 13.8 wt. the cobalt oxide of 4.2 wt. the raw material used trihydrate aluminum content wt. oxides: silicon 0,16, iron 0,038, potassium and sodium - 0,53, moisture 11,8 obtained from Pikalyovo alumina.

3. DT K (TU 38.301-13-91) with the content of molybdenum trioxide 15% wt. the cobalt oxide 4.5% by weight. the raw material used trihydrate aluminum content, wt. oxides: silicon 0,25, iron 0,05, potassium and sodium 0,75, moisture 13,0 obtained from Achinsk alumina.

Direct catalytic composition of the package with the indication used for Hydrotreating raw settings Hydrotreating and kachadurian sulfur in the resulting product, and also similar data for carrying out the process in a known manner (example 6).

Examples 1-3 are executed in accordance with the proposed claims for different types of raw materials. Examples 4 and 5 shows how the beyond.

From the table it is seen that the proposed method allows to obtain the desired depth of Hydrotreating. Implementation of a prototype on the same raw materials such results does not. The change in the ratio of the used catalyst downward share aluminoborosilicate catalyst made of alumina deposits Pikalyovo, leads to a reduction in the depth of Hydrotreating.

The method of obtaining low-sulfur petroleum fractions and products with sulphur content not more wt.

Gasoline 0,15

Diesel fuels 0,2

Vacuum gasoil feedstock for catalytic cracking 0,6

by Hydrotreating of crude oil at elevated temperature and pressure in the presence of packet alumina catalysts, pre-activated in the environment of the hydrogen-containing gas to elemental sulfur or raw materials with 350 400o, Characterized in that use package alumina catalysts containing 20 to about 100. lumocolor CLASS="ptx2">

Silicon 0,2

Iron 0.04

Potassium and sodium 0,6

Water 12.0 p

 

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4 tbl, 3 ex

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