RU2184761C1 - Method of processing heavy petroleum residues - Google Patents

Abstract

FIELD: petroleum processing. SUBSTANCE: initial raw material is treated with ozone-containing gas in amounts 0.05 to 0.5 wt % and then subjected to thermal cracking at 400-430 C, pressure 0.5-3.0 MPa, and volume flow rate 1-2 h^-1. EFFECT: enabled production of desired products, in particular gasoline and diesel fractions, with high yields and minimum coke formation. 3 cl, 2 ex

Description

 The invention relates to oil refining, namely to the thermal processing of heavy oil residues to obtain light petroleum products.

A known method of processing heavy oil residues by pre-oxidizing them at 20-200 ^o C in the presence of oxygen to an acid content of 0.01-2 wt.% Or asphaltenes content of 0.01-4 wt.% For 2-200 hours. Then the oil product heated to 370-540 ^o With a pressure of 7-20 MPa (GB 1023528, 03.23.66).

 The disadvantages of this method are its complexity and bulkiness, as well as significant coke formation.

Closer to this invention is essentially a method for processing heavy oil fractions, comprising mixing the feedstock with an additive obtained by treating oil products with an ozone-containing gas, heating the mixture, and then separating the products into fractions. Petroleum products to obtain additives must contain at least 0.5 wt.% Sulfur-containing compounds in terms of sulfur and at least 3.55 wt.% Polyarene compounds. Mixing the additive with the feedstock is based on the content of 0.5-13 g of ozone absorbed by the additive per 1 kg of the resulting mixture. Heating of raw materials with the addition can be carried out at a temperature below 500 ^o C and atmospheric pressure. The resulting product is dispersed into fractions (RU 2123026, 10.12.98).

 The disadvantage of this method is the significant coke formation during thermal processing of the source of heavy raw materials.

 The aim of this invention is to reduce coke formation.

The goal is achieved by a method of processing heavy oil residues by treating them with an ozone-containing gas to absorb ozone in an amount of, preferably, 0.05-0.5 wt.% Followed by thermal cracking of the resulting product at a temperature of preferably 400-430 ^o C, pressure 0.5 -3.0 MPa and the space velocity of the raw materials in the thermal reactor is 1-2 h ^-1 .

 Example 1

Straight run fuel oil is treated with ozone-containing gas with an ozone content of 10% until the absorption of ozone in an amount of 0.1%. The resulting product is subjected to thermal cracking at a temperature of 410 ^o With a pressure of 1 MPa and at a volumetric rate of raw materials in the reactor 1 h ^-1 . The yield of light petroleum products is 70% with coke formation of 0.2%.

 Example 2

Oil tar is treated with ozone-containing gas with an ozone content of 10% until the absorption of ozone in an amount of 0.5%. The resulting product is subjected to thermal cracking at a temperature of 430 ^o With a pressure of 3.0 MPa and at a volumetric rate of raw materials in the reactor 2 h ^-1 . The yield of light products is 65% with coke formation of 0.25%.

 Thus, this method allows to obtain significant yields of light oil products (gasoline and diesel fractions) with minimal coke formation.

Claims (3)

1. A method of processing heavy oil residues, including the processing of petroleum products with an ozone-containing mixture and thermal cracking of the obtained product and feedstock, characterized in that the treatment of the ozone-containing mixture is subjected to the feedstock, followed by thermal cracking of the obtained product at a pressure of 0.5-3.0 MPa and volumetric speed 1-2 h ^-1 . 2. The method according to p. 1, characterized in that thermal cracking is carried out at a temperature of 400-430 ^o C.  3. The method according to PP. 1 and 2, characterized in that the feedstock is treated with ozone-containing gas until the absorption of ozone in the amount of 0.05-0.5 wt. %