SU1555344A1 - Method of processing vacuum gas oil - Google Patents

Abstract

The invention relates to petrochemistry, in particular to the processing of vacuum gas oil. The goal is to increase the yield of target products. Processing lead by catalytic cracking of the feedstock in the presence of a zeolite-containing catalyst and additives - air in the amount of 1.3 - 4.0 wt.% (In terms of oxygen) from the feedstock. In order to increase the yield, air is used in an amount of 2.5–4.0 wt.% (In terms of oxygen) from the feedstock. In order to increase the yield of light gas oil, air is used in an amount of 1.3–1.5 wt.% (In terms of oxygen) from the feedstock. The method allows to change the yield of the desired desired product depending on the needs, while providing an increase in the yield of catalyzate up to 90 wt.% In the case of maximum yield of gasoline and up to 92.5 wt.% In the case of switching production to the maximum yield of light gas oil. The increase in the yield of gasoline is 7.19 wt.%, And light gas oil, 5.3 wt.%. 2 hp f-ly. 3 tab.

Description

The invention relates to a method for processing vacuum gas oil catalytic cracking and can be used in the petrochemical industry.

The aim of the invention is to increase the yield of the target products - gasoline and light gas oil.

Vacuum gas oil is used as a feedstock; its characteristic is presented in Table. one.

Example. 10 cl (8.72 g) vacuum gas oil, characterized by the indicators presented in

tab. 2, in a mixture with air, is subjected to catalytic cracking in a flow-type plant in the presence of a microspherical zeolite-containing cracking catalyst. The process is carried out in a fixed catalyst bed at a temperature in the reaction zone of 500 ° C and a mass feed rate of 20, followed by cooling and separation of the cracking products.

The amount of added air is regulated in the range: 0; 0.6; 1.3; B 55 m; 5.0 masd (in terms of

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e to oxygen) in relation to raw materials. The results of the experiments are given in table. 2

As can be seen from the table. 2, the maximum gasoline output of 30.8-31.11 masd is obtained while maintaining air flow at a level of 2.5 mec.% (In terms of oxygen) relative to the raw material.

The maximum yield of light gas oil, 5.75-35.9 wt.%, Is obtained when the air flow rate is below the level of 1.3–1.5 wt.% (In terms of oxygen) relative to the raw material. According to the motor method, the octane number of obtained enzine, while maintaining the air consumption of 2.5,, O wt.% Is 79 points, with 1.3-1.5 wt.%, Respectively, 78 points.

If it is necessary to obtain the maximum gasoline yield, the air consumption varies in the range of 2.5–0 May. (in terms of oxygen) at a rate of 8.8-19 l / h per 105 g / h of raw material, while maintaining a mass ratio of the original vacuum gas oil to air, equal to 1: 70-1: 160, Upon receipt of the maximum yield of light gas oil, air consumption is in the range of 5.0-5.5 l / h per 105 l / h of raw material, maintaining the mass ratio of these components 1y2,0, 5.

In tab. 3 presents comparative data on the known and proposed methods.

From tab. 3 it follows that the proposed method allows to change the output

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the desired target product, depending on the needs and thus provides an increase in catalyst yield up to 90 wt.% in the case of maximum output of gasoline and up to 92.5 wt.% - in the case of transfer of production to the maximum yield of light gas oil. The increase in the yield of gasoline is 7.19 wt.%, And light gas oil, 5.3 wt.%.

Claims (3)

1. A method of processing vacuum gas oil by catalytic cracking of the feedstock in the presence of a zeolite-containing catalyst and an oxygen-containing additive to produce target products of gasoline and light gas oil, characterized in that, in order to increase the yield of the target products, air in the amount of 1.3%, 0% by weight (in terms of oxygen) from the feedstock is used as an additive. 2. The method according to claim 1, characterized in that, with a chain of increase in the output of gasoline, air is used in an amount of 2.5-, 0 wt.% (In terms of oxygen) from the feedstock. 3. Method pop. 1, which differs from the fact that, in order to increase the yield of light gas oil, air is used in an amount of 1.3-1.5 wt.% (In terms of oxygen) from the feedstock. I Table 1 Table 3 Indicator The proposed method Maximum output gasoline Type of additive Air air g-b 2.5-13.1 4.7 Oxyalkylation; alkyl phenols or ethylene oxide block copolymers and propylene oxide 0.01 2,5-M1,3-1,5 (in terms of (in terms of oxygen) oxygen) 87.9-90.0 92.0-92.5 75.34-79.24 2.51-3.26 9.7-9.4 0.6 2.51-3.26 7.2-3.4 5.3 Known method light gas oil Oxyalkylation; alkyl phenols or block copolymers of ethylene oxide and propylene oxide 0.01 2.51-3.26 Indicator The proposed method Maximum output gasoline The quality of the target product, the octane number of gasoline by the motor method 15553M 8 Continued tabl, 3 Known method light gas oil 78 77