RU2206600C1 - High-octane gasoline production process - Google Patents

Abstract

FIELD: petroleum processing and petrochemistry. SUBSTANCE: straight-run gasoline fraction 85-180 C is subjected to catalytic reforming at 480-530 C, pressure up to 3.5 MPa, volume feedstock-supply velocity 1.5 h^-1, and volumetric circulating factor of hydrogen-containing gas 1500. Reforming product comes into contact with alumina-supported catalyst, containing 15-19% tungsten trioxide and 1-5% nickel dioxide, at 180-280 C and pressure 2.8-4 MPa. EFFECT: improved antiknock property of product due to reduced level of aromatic hydrocarbons, especially benzene. 2 tbl, 5 ex

Description

 The invention relates to oil refining and can be used in the production of high-octane gasolines.

A known method of producing high-octane gasoline reforming paths of straight-run gasoline fractions in the presence of an alumina-platinum catalyst. The process is carried out at a temperature of 480-520 ^o C and pressure up to 4 MPa (Sulimov A.D. Catalytic reforming of gasolines. - M .: Chemistry, 1973, p. 87-90). The disadvantage of this method is the low octane number of the reformate.

The closest technical solution to the claimed invention is a method for producing high-octane gasoline by catalytic reforming of straight-run gasoline fractions at a temperature of 480-530 ^o C, pressure up to 3.5 MPa, followed by contacting the reformate with an alumina-molybdenum catalyst at a temperature of 350-430 ^o C and a pressure of 3 -5 MPa (USSR author's certificate 681904, class C 10 G 39/00, 1978 / prototype /). The disadvantage of this method is the high content of aromatic hydrocarbons, including the most toxic and undesirable component - benzene, in the target product.

 An object of the invention is to improve the quality of the target product by reducing the content of aromatic hydrocarbons, including the most toxic and undesirable component - benzene.

The essence of the invention lies in the fact that in the known; a method for producing high-octane gasoline by catalytic reforming of straight-run gasoline fractions at a temperature of 480-530 ^o C, pressure up to 3.5 MPa, followed by contacting the reformed products with an aluminum-nickel catalyst, according to the invention, the contacting is carried out with a catalyst containing 15-19 wt.% tungsten trioxide and 1-5 wt.% Nickel dioxide on alumina, at a temperature of 180-280 ^o C and a pressure of 3-4 MPa.

The method is as follows. Straight-run gasoline fraction 85-180 ^o With subjected to reforming in the presence of a catalyst containing 0.35 wt.% Platinum, 0.36 wt.% Rhenium, 0.25 wt.% Cadmium, 1 wt.% Chlorine and the rest of aluminum oxide, at a temperature of 480 -530 ^o C, pressure up to 3.5 MPa, a volumetric feed rate of 1.5 h ^-1 , the multiplicity of the circulation of hydrogen-containing gas (BCG 1500 nm ³ / m ^3. The reformate is contacted with a catalyst containing 15-19 wt.% Trioxide tungsten and 1-5 wt.% nickel dioxide on alumina, at a temperature of 180-280 ^o C and a pressure of 2.8-4 MPa.

 The content of aromatic hydrocarbons in the target product is 40-45 wt. % against 52-54 wt.% (known method), including the absence of the most toxic and undesirable component - benzene and 2-5 wt.% in the target product obtained in a known manner.

A distinctive feature of the method is the contacting of reforming products with a catalyst containing 15-19 wt.% Tungsten trioxide, 1-5 wt. % nickel dioxide on alumina, at a temperature of 180-280 ^o With and a pressure of 2.8-4 MPa.

 Examples of the implementation of the claimed invention.

Example 1
Straight-run gasoline fraction 85-180 ^o With subjected to reforming in the presence of a catalyst containing 0.35 wt.% Platinum, 0.36 wt.% Rhenium, 0.25 wt.% Cadmium, 1 wt.% Chlorine and the rest is aluminum oxide, at a temperature of 480-530 ^o With a pressure of up to 3.5 MPa, a volumetric feed rate of 1.5 h - the circulation rate of the VSG is 1500 nm / m. The reformate is contacted with a catalyst containing 15 wt.% Tungsten trioxide and 5 wt.% Nickel dioxide on alumina at a temperature of 180 ^{° C.} and a pressure of 2.8 MPa.

 The content of aromatic hydrocarbons in the target product is 40 wt.% Against 52-54 wt.% (Known method), including the absence of the most toxic and undesirable component - benzene and 2-5 wt.% In the target product obtained in a known manner.

The quality data of the feedstock and the resulting products are given in table. 1. In the following examples, a straight-run gasoline fraction of 85-180 ^° C and a reforming product are used, the quality of which is shown in Table 1.

 For additional processing (contacting) of the reforming product using the specified catalyst containing tungsten trioxide and nickel dioxide on alumina.

Example 2
The reformate is contacted with a catalyst containing 19 wt.% Tungsten trioxide and 1 wt.% Nickel dioxide on alumina at a temperature of 280 ^{° C.} and a pressure of 4 MPa.

 The content of aromatic hydrocarbons in the target product is 45 wt.% Against 52-54 wt.% (Known method), including the absence of the most toxic and undesirable component - benzene and 2-5 wt.% In the target product obtained in a known manner.

Example 3
The reformate is contacted with a catalyst containing 17 wt.% Tungsten trioxide and 3 wt.% Nickel dioxide on alumina at a temperature of 230 ^{° C.} and a pressure of 3.4 MPa.

 The content of aromatic hydrocarbons in the target product is 42 wt.% Against 52-54 wt.% (Known method), including the absence of the most toxic and undesirable component - benzene and 2-5 wt.% In the target product obtained in a known manner.

Example 4
The reformate is contacted with a catalyst containing 22 wt.% Tungsten trioxide and 0.2 wt.% Nickel dioxide on alumina at a temperature of 120 ^{° C.} and a pressure of 0.8 MPa.

 The content of aromatic hydrocarbons in the target product is 55.8 wt.% Against 52-54 wt.% (Known method), including 1.8 wt.% Of the most toxic and undesirable component - benzene and 2-5 wt.% In the target product, obtained in a known manner.

Example 5
The reformate is contacted with a catalyst containing 8 wt.% Tungsten trioxide and 8 wt.% Nickel dioxide on alumina at a temperature of 380 ^o C and a pressure of 6 MPa.

 The content of aromatic hydrocarbons in the target product is 60.2 wt.% Against 52-54 wt.% (Known method), including 2.5 wt.% Of the most toxic and undesirable component - benzene and 2-5 wt.% In the target a product obtained in a known manner.

 Table 2 summarizes the data on the contact conditions of the reforming product with the catalyst and data on the quality of the target product. The characteristics of the known method are also given there.

 From the data shown in table 2, it is seen that the proposed method improves the quality of the target product by reducing the content of aromatic hydrocarbons, including the most toxic and undesirable component - benzene.

 The present invention can be used in fuel refineries for the production of high-octane gasolines.

Additional advantages of the proposed method compared to the known method are:
increasing the octane number of the target product by 0.4-0.9 points due to the reaction of isomerization of paraffin hydrocarbons of normal structure in the presence of the proposed catalyst;
an increase in the yield of the target product, that is, the mass of gasoline, by 2.1-4.6 wt. % due to the chemical addition of hydrogen to the molecules of aromatic hydrocarbons during hydrogenation in the presence of the proposed catalyst.

Claims (1)

A method of producing high-octane gasoline by catalytic reforming of straight-run gasoline fractions at a temperature of 480-530 ^o C, pressure up to 3.5 MPa, followed by contacting the reforming products with a catalyst, characterized in that the contacting is carried out with a catalyst containing 15-19 wt.% Tungsten trioxide and 1-5 wt.% nickel dioxide on alumina, at a temperature of 180-280 ^o C and a pressure of 2.8-4 MPa.

Images