SU1444333A1 - Method of producing high-octane gasoline components - Google Patents

Description

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The invention relates to an improved method for the preparation of high-octane components of benzines - methyl tert-butyl ether (MTBE) and mett-tert-amyl ether (MTAE).

The purpose of the invention is to increase the yield of high-octane gasoline components.

To achieve this goal, high-octane gasoline (ethers) are obtained by reacting methanol with a hydrocarbon feedstock at

the presence of a catalyst, while in

As a hydrocarbon feedstock, a mixture of fractions C, C of catalytic cracking from C5 pyrolysis fraction is used, the Cj pyrolysis fraction being previously hydrogenated to contain diene hydrocarbons. 0.2-3 wt.%,

Example 1. Hydrogenation is subjected to fraction C; pyrolysis of the following composition, wt.%: C5-paraffins 19.4, C-olefins 27.7; C5-diene

42.1, the rest € 4, p.

Hydrogenation is carried out on a palladium sulfide catalyst at a temperature of 125-135 ° C, a pressure of 50 ° C and a hydrogen circulation of 190-210 nm per 1 m of raw material, and by changing the temperature mode and changing the ratio of hydrogen to raw material, provide a predetermined depth hydrogenation determined by the residual diene content in the hydrogenated fraction.

The results of the hydrogenation are given in table. one.

Example 2. (known). The fraction is subjected to hydrogenation to a diene content of 0.1% by weight, with g of pyrolysis, taken in an amount of 0.48 tons.

Hydrogenation is carried out under the conditions of Example 1. Then this fraction is reacted with methanol on a CIF-2 catalyst at 70 ° C and a pressure of 8.5 kgf / cm. The process is carried out at a feed rate of hydrocarbons of 50 kg / h, methanol - 3.55 kg / h.

Then, under these conditions, conducts the interaction of the C4 Cf fractions of catalytic cracking, taken in an amount of 4.52 tons with methanol.

The feed rate of the hydrocarbon feedstock is 50 kg / h, methanol 6.51 kg / h.

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As a result of mixing bottoms of the synthesis, a product was obtained containing 868 kg of ethers (Table 2). Example 3. Hydrogenation to a diene content of 0.2 wt.% In the sheets of Example 1 is subjected to 0.48 tonnes. Su fractions of pyrolysis,

The hydrogenated fraction is mixed with 10 .5 of 4.52 tons of C, C - catalytic cracking fractions and the mixture is reacted with methanol under the conditions of example 2 at a feed rate of hydrocarbon feedstock of 50 kg / h, 0

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As a result of the synthesis, a product containing 881, 2 kg of ethers is obtained from the cube of the reaction apparatus (Table 2),

Example 4. Hydrogenation to a content of 3% by weight of the diene under the conditions of Example 1 is subjected to 0.48 tons of Cj pyrolysis fraction.

The hydrogenated fraction is mixed with 4.52 tons of catalytic cracking fraction C, Cj and the mixture is reacted with methanol under the conditions of Example 2. At a feed rate of 50% hydrocarbon feedstock, methanol 6.6 kg / h, the synthesis results in the product containing 895.3 kg of esters (Table 2)

From the above examples, it can be seen that when carrying out the process under the conditions of the proposed method, 895.3 kg of esters were obtained from 5 tons of raw materials, whereas in the known method, 868 kg of esters were obtained from the same amount of raw materials.

Thus, the proposed method allows to increase the amount of the obtained high-octane components of gasoline - esters (and also, as can be seen from Table 2, the amount of olefins increases compared with the limit ones, which also increases the octane number of the bottom product).

The pyrolysis fraction Cj was used as a component of gasoline A-76. The application of the proposed method makes it possible, on the basis of the C 5 pyrolysis fraction, to additionally produce MTAE in the amount of 8.2 thousand tons / year, which makes it possible to increase the production of high-octane AI-93 gasoline by 17 thousand tons / year.

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The method of producing high-octane gasoline components by the interaction of methanol with a hydrocarbon feedstock containing C and C -isoolefins in the presence of a catalyst — cation-exchange resins at elevated temperatures, characterized in that in order to increase the amount of high-octane components.

As a hydrocarbon feedstock, a mixture of the catalytic cracking fraction C, C 5 and the pyrolysis fraction of Su, previously subjected to hydrogenation to a diene hydrocarbon content of 0.2–3 wt.%, is used.

Table 1

table 2

Claims (1)

Claim A method of producing high-octane gasoline components in combination with methanol and a hydrocarbon feed containing 1,444,333 containing C ₄ and C ₅ ~ isoolefins in the presence of a catalyst - cation exchange resins at elevated temperatures, characterized in that, in order to increase the amount of high-octane components, a mixture is used as a hydrocarbon feed fractions of catalytic cracking C ₄ , Su and fractions of pyrolysis C ₅ , previously subjected to hydrogenation to a content of diene hydrocarbons of 0.2-3 wt.% Table 1 The hydrogenated fraction to the content of diene, wt.% Components Source fraction • wt.% 0.1 0.2 0.5 1,0 | 4.0 C _{5 -} Paraffins 19,4 30.15 22.9 22.1 21 J 20, -7 19.2 Sous olefins 27.7 58.3 65,4 65.8 66.6 68.0 66.5 including isoolefins 9.15 16.4. 19.3 19.9 21.1 21.7 20.9 C ₅ - Diene 42.1 0.1 0.2 0.5 1,0 3.0 4.0 The remaining hydrocarbons 10.8 11.54 And 5 1 1.6 11.3 10.3 10.3 1 T a b l 2 ¹ Components The initial fraction of Cf pyrolysis, t Fractions C ₄ , C $ catalytic cracking, t The amount of esters obtained, kg, as an example Hydrogenated fraction of Su pyrolysis, t, following the example of ΞΞΖΙΖ’ΙΞ C ^ -limit 12.9. "I * - Butylene 14.5 3,5 Including butylene C _} -limit 9.74 0.93 1.36 1,02 0,905 C ₅ -Olefins 7.56 1.33 2.63 2.91 3.02 Including amylene 2.9 0.44 0.74 0.86 0.89 (/ -Dienovye 2.02 0.005- 0.006. 0.01- 0.012 0,03- 0,035 ^{0) 5} 0.52 0.52 0.52 0.52 MTBE 492.0 492.2 492.3 MT AZ 376 389 403 Total airs 868 881.2 895.3 Total 45,2 4.8 Editor M. Nedoluzhenko Compiled by M. Merkulova Tehred M. Didyk Corrector M. Demchik Order 6455/26 Draw 370 Subscription VNIIIPI of the USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushskaya nab., 4/5 Production and printing company, Uzhhorod, st. Project, 4