The low-viscosity marine fuel

 

(57) Abstract:

The invention relates to fuel compositions. Provides for low-viscosity marine fuel and is intended for use in medium-speed and high-speed diesel engines. In the proposed composition as distillates direct distillation of crude oil used fraction of atmospheric gasoil 240-450oC, fraction of the first vacuum ring 200-400oC, as distillates coking - faction 160-400oC, as a distillate of the catalytic cracking fraction gas oil catalytic cracking 180-400oWith ratio, wt.%:

atmospheric gas oil fraction 240-450oC - 5-15

the first vacuum wrap fraction 200-400oC - 5-25

the oil coking fraction 160-400oC - 5-30

gasoil cat.cracking fraction 180-400oC - 5-60

fraction of diesel fuel 160-360oC - 100

The use of a composition allowed us to increase the output of TMS by 16% and to improve its operational properties: lubricity, heat of combustion, corrosion aggressiveness. table 4.

The invention relates to fuel compositions, provides for low-viscosity marine fuel and is luchetta in the following.

Known composition of the low-viscosity marine fuel (TMS), obtained by compounding vacuum gasoil, diesel fractions 160-300oC units at TC with a light gas oil coking fraction 160-300oC in the ratio 5:40: 45:10, 20:25:25:30 (Refining and petrochemicals. 1982, No. 9, S. 4).

However, in this composition are low-boiling fraction, which leads to lower cetane number and exit of fuel. The use of distillate coking, wikipaedia within 160-300oC contributes to poor binding capacity and corrosive fuel.

The closest in technical essence and the achieved result is the composition of TMS, including distillate diesel fuel fraction 160-360oC installation at a fraction of 190-280oC with catalytic cracking unit and faction 190-290oC installation of coking in the ratio of 1:1:1.

However, in this composition are also used low-boiling fraction, which leads to low cetane number of TMS (42%), and reducing fuel oil. The use of low-boiling fractions contributes to the deterioration of the operating characteristics of TMS, namely lubricity and corrosion Eisenia output TMS, improving lubricity, heat of combustion and corrosion resistance.

The solution of this task is mediated by a new technical result - obtaining compositions TMS by compounding atmospheric gas oil fraction 240-450oC, the first vacuum ring faction 200-400oC, coking distillate fraction 160-400oWith and catalytic cracking fractions 180-400oC, with diesel fuel fraction 160-360oC in the ratio, wt.

atmospheric gas oil fraction 240-450oC 5-15

the first vacuum wrap fraction 200-400oC 5-25

the coking distillate fraction 160-400oC 5-30

the distillate of the catalytic cracking fraction 180-400oC 5-60

diesel fuel fraction 160-360oC to 100

Distinctive features of the proposed technical solutions are: allocation of oil and catalization fractions of a given fraction composition and use them in a certain ratio to obtain a composition TMS:

Atmospheric gas oil fraction 240-450oC 5-15

The first vacuum wrap fraction 200-400oC 5-25

The coking distillate fraction 160-400oC 5-30

The distillate of the catalytic cracking fraction 180-400oC 5-60

Di the characteristics of the components of the low-viscosity marine fuel, in table.2 - component composition the proposed composition TMS. In table.3 and 4 as TMS and its operational characteristics.

The use of the claimed compositions TMS was significantly increased (16 wt. ) output TMS, due to the exclusion of the stage selective treatment and a significant increase in end-boiling fuel. TMS obtained according to the invention, has better performance than the prototype on the cetane number pour point, significantly improve the operational characteristics of TMS.

Lubricity fuel when tested in CSM increased from 52 to 62, reduced corrosion loss began when testing it on the device Pinkevich and the corrosivity of TMS under conditions of condensation of water according to GOST 18597-73 (PL. 4). Composition TMS obtained according to the invention, is characterized by a higher, che prototype, calorific value.

From the data table. 3 shows that the change in the ratio of fractions leads to the deterioration of the quality claimed TMS.

The increase of the content in the composition of the heavy distillate fractions stated above leads to the increase in the pour point of the fuel and p THE iodine number, and gas oil catalytic cracking lower cetane number. When used in composition, as heavy distillates, distillates coking below the stated ratios leads to increased use of scarce diesel fuel and reduce the output of the low-viscosity marine fuel.

The low-viscosity marine fuel containing distillates direct distillation, coking and catalytic cracking, characterized in that as distillates direct distillation of crude oil contains a fraction of atmospheric gasoil 240 - 450oAnd the fraction of the first vacuum ring 200 400oWith as coking distillate fraction 160 400oWith, as a distillate of the catalytic cracking fraction of catalytic cracking gas oil 180 - 400oWith the following ratio of components, wt.

Atmospheric gasoil fraction 240 450o5 15

The first vacuum wrap, fraction 200 400o5 25

The oil coking fraction 160 400o5 30

The catalytic cracking gas oil fraction 180 400oC 5 60

Fraction of diesel fuel, 160 360oWith Up To 100

 

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