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A laboratory extraction method for colloidal blending components used to prepare needle coke

An extraction method, laboratory technology, applied in the direction of solid solvent extraction, etc.

Active Publication Date: 2021-04-13
SHANDONG YIDA NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is no extraction method targeting colloids in petroleum asphalt in China

Method used

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  • A laboratory extraction method for colloidal blending components used to prepare needle coke
  • A laboratory extraction method for colloidal blending components used to prepare needle coke
  • A laboratory extraction method for colloidal blending components used to prepare needle coke

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] A laboratory extraction method for preparing colloidal blending components of needle coke, comprising the following steps:

[0061] (1) After the raw material asphalt is temporarily stored in the raw material asphalt tank 2, it is sent to the raw material / solvent static mixer 5 through the raw material asphalt pump 4; sent to the raw material / solvent static mixer 5; the low-carbon aliphatic hydrocarbon and the raw material pitch are fully mixed in the raw material / solvent static mixer and then enter the supercritical extraction tower 8;

[0062] (2) In the supercritical extraction tower 8, the low-carbon aliphatic hydrocarbon performs supercritical extraction on the saturated and aromatic components in the raw asphalt, and the saturated and aromatic components in the raw asphalt are dissolved in the low-carbon aliphatic hydrocarbon solvent; the upper layer is dissolved The low-carbon aliphatic hydrocarbon solvent of saturated and aromatic content in the raw asphalt ente...

Embodiment 2

[0069] The present invention also provides a laboratory extraction method for preparing the colloidal blending component of needle coke, comprising the following refining steps:

[0070] (1) first add a certain amount of low-carbon aliphatic hydrocarbons into the low-carbon aliphatic hydrocarbon solvent tank 1 and the supercritical extraction tower 8; then add a certain amount of colloidal solvent into the colloidal solvent tank 14; then add a certain amount of The raw bitumen is added to the raw bitumen tank 2.

[0071] (2) After the raw asphalt is temporarily stored in the raw asphalt tank, turn on the low-carbon aliphatic hydrocarbon solvent pump 3 to inject the low-carbon aliphatic hydrocarbon into the raw material / solvent static mixer 5, and simultaneously open the raw asphalt pump 4 to inject the raw asphalt into the raw material / solvent static mixer 5. Mixer 5; the adding volume ratio of low-carbon aliphatic hydrocarbon and raw material pitch in the raw material / solvent...

Embodiment 3

[0080] Embodiment 3: raw material bitumen selects Kuwait vacuum residue for use (the four components of raw material 1 are shown in Table 1); low-carbon aliphatic hydrocarbon selects propane; colloidal solvent selects tetrahydrofuran for use; the mixing volume ratio of propane and Kuwait vacuum residue is 4 : 1; the mixing volume ratio of tetrahydrofuran and supercritical raffinate is 3:1; the operating pressure of the supercritical extraction tower is 4.5MPa, and the operating temperature is 110℃; the operating pressure of the supercritical recovery tower is 1.5MPa, and the operating temperature is 110℃; The operating pressure of the residue collection tank is 1.5MPa, and the operating temperature is 110℃; the operating pressure of the gum extraction tower is 0.05MPa, and the operating temperature is 50℃; the operating pressure of the gum solvent recovery tower is 0.05MPa, and the operating temperature is 100℃; the operating pressure of the asphaltene collection tank is 0.05 M...

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Abstract

The invention belongs to the technical field of preparing needle coke in a laboratory, and in particular relates to a laboratory extraction method for extracting a colloid blending component used for preparing needle coke in a laboratory from petroleum pitch. First use low-carbon aliphatic hydrocarbons to carry out supercritical extraction of petroleum asphalt in a supercritical state, separate the saturated components, aromatic components and raffinate in petroleum asphalt, and then use a colloidal solvent (a medium polar aprotic solvent) Extract the raffinate of supercritical extraction, separate the raffinate asphaltenes, and obtain the colloid component used as the blending component of the raw material for needle coke production. The mass content of the colloid after separation can reach more than 92%, or even as high as 95% %. Realized the effective separation of saturated components, aromatic components and asphaltenes in petroleum asphalt under the condition of small-scale laboratory test, and extracted the colloid of the raw material blending components for needle coke production. The technical feasibility of colloid extraction from petroleum asphalt has been proved; it provides a reliable raw material source for the further refined separation of colloid.

Description

technical field [0001] The invention belongs to the technical field of preparing needle coke in a laboratory, and in particular relates to a laboratory extraction method for extracting a colloid blending component used for preparing needle coke in a laboratory from petroleum pitch. Background technique [0002] At present, some domestic enterprises have been able to industrialize the production of needle coke, and some domestic scholars have also conducted research on petroleum asphalt, the raw material for producing oil-based needle coke, and most of them agree that petroleum asphalt is rich in short side chains and linear connections. Polycyclic (3-4 ring) aromatics are high-quality raw materials for producing needle coke, but there are few reports on the quantitative impact of colloid content on the quality of needle coke. [0003] Colloid is a component of petroleum asphalt. At present, there is no unified analysis method and definite definition in the world. The "Petro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D11/02
Inventor 徐金城彭莉廖虎王继银李军树郭冲王秋波
Owner SHANDONG YIDA NEW MATERIAL
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