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Oily material suitable for producing needle coke as well as preparation method and system thereof

A needle coke and oil quality technology, applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve problems such as loss of aromatics, difficulty in needle coke products, and impact on the quality of needle coke.

Active Publication Date: 2021-04-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The needle coke raw material obtained by this method still contains a certain amount of colloid, and hydrogenation will cause some aromatics to undergo ring-opening reactions, resulting in the loss of three-ring and four-ring aromatics. These factors will affect the quality of needle coke. It is difficult to produce high-grade needle coke products

Method used

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  • Oily material suitable for producing needle coke as well as preparation method and system thereof
  • Oily material suitable for producing needle coke as well as preparation method and system thereof
  • Oily material suitable for producing needle coke as well as preparation method and system thereof

Examples

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Effect test

preparation example Construction

[0026] The first aspect of the present invention provides a method for preparing an oily material suitable for producing needle coke, the method comprising:

[0027] 1) Send the raw oil 1 to the fractionation tower 2 for fractionation treatment to obtain the crude wax oil component 5 and the fractionation tower bottom heavy oil component 6;

[0028] 2) The crude wax oil component 5 and the first steam 7 are sent to the first stripper 8 for the first stripping treatment to obtain the first stripper light component 9 and the first stripper bottom oil 10;

[0029] 3) The fractionation tower bottom heavy oil component 6, the first stripper bottom oil 10 and the second steam 13 are sent to the second stripper 12 to carry out the second stripping treatment, to obtain the second stripper light Component 15 and second stripper bottoms 14;

[0030] 4) sending the light components 9 of the first stripper and the light components 15 of the second stripper to a hydrogenation unit for hy...

Embodiment 1

[0090] This example is used to illustrate the preparation method of the oily material suitable for producing needle coke according to the present invention.

[0091] use figure 1 The system shown performs the manufacturing process described below.

[0092] (1) Feedstock oil 1 is sent in fractionating tower 2, and fractionating condition is: fractionating tower tower top temperature is 115 ℃, and fractionating tower tower top pressure is 0.12MPa, and fractionating tower tower bottom temperature is 350 ℃ to carry out fractionation treatment, and Separate and obtain gasoline 3, diesel oil 4, crude wax oil component 5 (that is, distillate oil with a distillation range of 350-450° C.) and fractionation tower bottom heavy oil component 6;

[0093] (2) The fourth stripper bottom oil 31 that the crude wax oil component 5 is discharged from the bottom of the fourth stripper 29 is combined to obtain mixed oil 32 and sent to the first stripper 8 to be mixed with the first stripper that ...

Embodiment 2

[0101] This example is used to illustrate the preparation method of the oily material suitable for producing needle coke according to the present invention.

[0102] According to the method described in embodiment 1, the difference is:

[0103] In step (2), the conditions for the first stripping treatment include: the temperature is 330°C, the gauge pressure is 0.15MPa, and the residence time is 1.8h;

[0104] In step (3), the conditions for the second stripping treatment include: the temperature is 350°C, the gauge pressure is 0.15MPa, and the residence time is 1h;

[0105] In step (4), the heating temperature of the hydrogenation feed preheater is 300°C, and the conditions for hydrotreating include: the temperature is 350°C, the reaction hydrogen partial pressure is 3MPa, and the hydrogen-to-oil ratio is 200Nm 3 / m 3 , with a volumetric space velocity of 1h -1 ;

[0106] In step (5), the conditions of the third stripping treatment include: the temperature is 300°C, the g...

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Abstract

The invention relates to the field of needle coke preparation, in particular to an oily material suitable for producing needle coke and a preparation method and a system of the oily material. The method comprises the following steps: feeding raw oil into a fractionating tower for fractionating to obtain crude wax oil and fractionating tower bottom heavy oil; sending the crude wax oil and steam into a stripping tower for primary stripping treatment to obtain a first stripping tower light component and stripping tower bottom oil; sending the fractionating tower bottom heavy oil, stripping tower bottom oil and steam into a stripping tower for secondary stripping treatment to obtain a second stripping tower light component and stripping tower bottom oil; sending the first stripping tower light component and the second stripping tower light component into a hydrogenation unit for hydrogenation treatment to obtain hydrogenation product oil; separating the hydrogenation product oil into a wax oil light component and a wax oil heavy component; and carrying out condensation reaction on the wax oil light component to obtain a liquid phase component rich in tricyclic and tetracyclic aromatic hydrocarbons. The method provided by the invention can effectively remove components which are not beneficial to production of needle coke in the raw oil, and also can retain the content of aromatic hydrocarbon to the maximum extent.

Description

technical field [0001] The invention relates to the field of needle coke preparation, in particular to an oily material suitable for producing needle coke and a preparation method and system thereof. Background technique [0002] Needle coke is the main raw material for producing high-power and ultra-high-power graphite electrodes. The price of high-quality needle coke is relatively high. It can be used as ultra-high-power graphite electrodes for electric furnace steelmaking, supercapacitors for electric vehicles, and lithium-ion electrodes for communication batteries. is widely used. The most critical influencing factor in the production of needle coke is the property of the raw material, the better the property of the raw material, the higher the grade of the needle coke product. It is generally required that the content of aromatics in the raw materials for the production of needle coke reaches 30-50% by weight, the content of colloids and asphaltenes is less than 1% by ...

Claims

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Application Information

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IPC IPC(8): C10G69/00
CPCC10G69/00C10G2300/1037
Inventor 阎龙申海平刘自宾范启明涂志强
Owner CHINA PETROLEUM & CHEM CORP
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