RU2131908C1 - High-octane gasoline production process - Google Patents

Abstract

FIELD: gasoline production. SUBSTANCE: straight-run gasoline fractions are reformed in presence of platinum-containing gas at 480-530 C and pressure up to 4 Mpa, after which reforming products come into contact with alumino-platinum catalyst containing 0.28 to 0.66 %4 platinum on alumina at 420-470 C and pressure 1,0-4,5 Mpa. EFFECT: increased principal product quality. 2 tbl, 5 ex

Description

 The invention relates to the production of motor fuels, in particular the production of high-octane gasoline, and can be used in the oil refining industry.

A known method of producing high-octane gasoline by reforming 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 reforming straight-run gasoline fractions in the presence of an alumina-platinum catalyst at a temperature of 480-530 ^o C, pressure up to 4 MPa, followed by contacting the reforming products with an alumina-platinum catalyst at a temperature of 430-460 ^o C and pressure 2-4 MPa. / USSR author's certificate N 664367, cl. C 10 G 39/00, 1979 (prototype). The disadvantage of this method is the high content of aromatic hydrocarbons 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 method for producing high-octane gasoline by reforming straight-run gasoline fractions in the presence of a platinum-containing catalyst at a temperature of 480-530 ^o C, pressure up to 4 MPa, followed by contacting the reformed products with an alumina-platinum catalyst, according to the invention, the contacting is carried out with a catalyst containing 0.28-0.66 wt.% platinum on alumina at a temperature of 420-470 ^o C and a pressure of 1.0 to 4.5 MPa.

The method is as follows. Straight-run gasoline fractions 85-180 ^o C are 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, a temperature of 480-530 ^o C, a pressure of up to 4 MPa, a volumetric feed rate of 1.5 h ^-1 , the multiplicity of the circulation of hydrogen-containing gas (HSG) 1500 nm ³ / m ³ . The reformate is contacted with a catalyst containing platinum from 0.28 to 0.66 wt.% And alumina at a temperature of 420-470 ^o C, a pressure of 1.0-4.5 MPa.

 The content of aromatic hydrocarbons in the target product is 45-50 wt. % against 59-60 wt.% (known method), including the absence of the most toxic and undesirable component - benzene and 1.5-3.0 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 0.28-0.66 wt.% Platinum on alumina at a temperature of 420-470 ^o C and a pressure of 1.0 to 4.5 MPa.

 Example 1

The rectangular gasoline fraction 85-180 ^o C is subjected to reforming in the presence of a catalyst containing 0.36 wt.% Platinum, 0.36 wt.% Rhenium, 0.25 wt.% Cadmium, 1 wt.% Chlorine and the rest is aluminum oxide, a temperature of 480-530 ^o C, a pressure of up to 4 MPa, a volumetric feed rate of 1.5 h ^-1 , the multiplicity of the circulation of hydrogen-containing gas (HSG) 1500 nm ³ / m ³ . The reformate is contacted with a catalyst containing platinum (0.66 wt.%) And alumina at a temperature of 420 ^° C. and a pressure of 1.0 MPa.

 The content of aromatic hydrocarbons in the target product is 45 wt. % against 59-60 wt.% (known method), including the absence of the most toxic and undesirable component - benzene and 1.5-3.0 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 given in Table. 1. For additional processing (contacting) of the reforming product using the specified catalyst containing platinum and alumina.

 Example 2

The reformate is contacted with a catalyst containing (0.28 wt.%) Platinum and alumina at a temperature of 470 ^° C. and a pressure of 4.5 MPa.

 The content of aromatic hydrocarbons in the target product is 50 wt. % against 59-60 wt.% (known method), including the absence of the most toxic and undesirable component - benzene and 1.5-3.0 wt.% in the target product obtained in a known manner.

 Example 3

The reformate is contacted with a catalyst containing (0.5 wt.%) Platinum and alumina at a temperature of 450 ^° C. and a pressure of 2.2 MPa.

 The content of aromatic hydrocarbons in the target product is 47 wt.% Against 59-60 wt.% (Known method), including the absence of the most toxic and undesirable component - benzene and 1.5-3.0 wt.% In the target product, obtained in a known manner.

 Example 4

The reformate is contacted with a catalyst containing (0.2 wt.%) Platinum and alumina at a temperature of 400 ^° C. and a pressure of 0.5 MPa.

 The aromatic hydrocarbon content in the target product is 61.5 wt.% Against 59-60 wt.% (Known method), including 1.2 wt.% Of the most toxic and undesirable component - benzene and 1.5-3.0 wt. .% in the target product obtained in a known manner.

 Example 5

The reformate is contacted with a catalyst containing (0.7 wt.%) Platinum and alumina at a temperature of 490 ^° C. and a pressure of 5 MPa. The content of aromatic hydrocarbons in the target product is 67 wt.% Against 59-60 wt.% (Known method), including 1.9 wt.% Of the most toxic and undesirable component - benzene and 1.5 - 3.0 wt.% in the target product obtained in a known manner.

 In the 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 above table. 2 data shows 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;
increase in the yield of the target product by 2-4.6 wt.%.

Claims (1)

A method of producing high-octane gasoline by reforming straight-run gasoline fractions in the presence of a platinum-containing catalyst at a temperature of 480-530 ^o C, pressure up to 4 MPa, followed by contacting the reformed products with an alumina-platinum catalyst, characterized in that the contacting is carried out with a catalyst containing 0.28-0, 66 wt.% Platinum on alumina, at a temperature of 420-470 ^o C and a pressure of 1.0-4.5 MPa.

Images