Needle coke prepared from heavy oil and method thereof

Abstract

The invention discloses needle coke prepared from heavy oil and a method thereof. The method comprises the following steps: selecting the heavy oil as a raw material; carrying out deliming treatment on the raw materials to obtain clarified oil; the clarified oil is separated by adopting a solid-liquid adsorption method, the polarity of an aluminum oxide stationary phase and the washing strength of a mobile phase are respectively adjusted according to different raw materials, a first mobile phase and a second mobile phase are subjected to gradient elution to obtain an aromatic-rich component, and the first mobile phase and the second mobile phase adopt a mixed or single solvent, preferably a mixed solvent; the aromatic-rich component is subjected to a first-stage carbonization reaction at low temperature and high pressure, and then is subjected to a second-stage carbonization reaction at high temperature and low pressure, so as to obtain a needle coke product. The preparation method provided by the invention has no harsh requirements on equipment, and the high-quality needle coke can be finally obtained.

Description

technical field

[0001] The invention relates to a method for preparing needle coke, in particular to a method for preparing needle coke by removing heavy oil ash, enriching aromatic hydrocarbons and classifying carbonization. It belongs to the technical field of petroleum deep processing and preparation of new carbon material needle coke. Background technique

[0002] Due to the shortage of petroleum resources in the world in recent years and my country's dependence on the import of petroleum resources, how to further process the existing petroleum resources in my country, reasonably and efficiently manufacture and utilize by-products of petrochemical resources, and increase petroleum resources The comprehensive utilization rate and added value of the chemical industry has become a key problem that petrochemical researchers in many petrochemical fields in my country urgently need to deal with. Among them, petrochemical products represented by needle coke can not only improve...

Examples

Embodiment 1

[0031] Using catalytic cracking oil slurry as raw material and using inorganic membrane filtration to obtain clarified oil, wherein the yield of clarified oil is 90wt.%, the ash content removal rate is 95%, and the ash content is 30ppm.

[0032] γ-neutral alumina was activated at 490°C for 6h, cooled to 20°C, added with 1.5 wt.% deionized water, mixed evenly, and then added to the chromatographic column. Dilute the clarified oil with a small amount of benzene and add it to the chromatographic column. Use benzene-ethanol with a volume ratio of 8:2 as the mobile phase to flush the stationary phase; continue to use benzene-ethanol with a volume ratio of 2:8 as the mobile phase to flush the stationary phase. Rinse dosage 1mL / g Al 2 O 3 , the elution phase was obtained, and the whole process was carried out at a constant temperature of 50 °C. The aromatic-rich component was obtained by taking the elution phase and evaporated the solvent, and the yield of the aromatic-rich compone...

Embodiment 2

[0036] Using catalytic cracking oil slurry as raw material and using inorganic membrane filtration to obtain clarified oil, wherein the yield of clarified oil is 90wt.%, the ash content removal rate is 95%, and the ash content is 30ppm.

[0037] The stationary phase in the column is γ-neutral alumina, activated at 490°C for 6h, cooled to 30°C, added with 1.5wt.% deionized water, mixed evenly, and then added to the chromatographic column. Dilute the clarified oil with a small amount of benzene and add it to the chromatographic column. Use n-heptane as the mobile phase to flush the stationary phase; continue to use toluene as the mobile phase to flush the stationary phase, and the amount of flushing agent is 1mL / g Al 2 O 3 , the elution phase was obtained, and the whole process was carried out at a constant temperature of 50 °C. The aromatic-rich component was obtained after the elution phase was evaporated to remove the solvent, and the yield of the aromatic-rich component was...

Embodiment 3

[0041] Taking medium and low temperature coal tar as raw material, adding 1 wt.% of market-oriented settling aids, mixing uniformly, and then settling at 90 °C for 24 hours, and taking the upper clarified oil, the yield of clarified oil was 90 wt.%, and the ash removal rate was 90 wt.%. 90%, the ash content is 90ppm.

[0042] The stationary phase in the column is γ-neutral alumina, activated at 450°C for 6h, cooled to 20°C, added with 1.5wt.% deionized water, mixed evenly, and then added to the chromatographic column. Dilute the clarified oil with a small amount of benzene and add it to the chromatographic column. Use benzene-ethanol with a volume ratio of 10:0 as the mobile phase to flush the stationary phase; continue to use benzene-ethanol with a volume ratio of 9:1 as the mobile phase to flush the stationary phase. Rinse dosage 1mL / g Al 2 O 3 , the elution phase was obtained, and the whole process was carried out at a constant temperature of 50 °C. The aromatic-rich com...

technical field

[0001] The invention relates to a method for preparing needle coke, in particular to a method for preparing needle coke by removing heavy oil ash, enriching aromatic hydrocarbons and classifying carbonization. It belongs to the technical field of petroleum deep processing and preparation of new carbon material needle coke. Background technique

[0002] Due to the shortage of petroleum resources in the world in recent years and my country's dependence on the import of petroleum resources, how to further process the existing petroleum resources in my country, reasonably and efficiently manufacture and utilize by-products of petrochemical resources, and increase petroleum resources The comprehensive utilization rate and added value of the chemical industry has become a key problem that petrochemical researchers in many petrochemical fields in my country urgently need to deal with. Among them, petrochemical products represented by needle coke can not only improve...

Examples

Embodiment 1

[0031] Using catalytic cracking oil slurry as raw material and using inorganic membrane filtration to obtain clarified oil, wherein the yield of clarified oil is 90wt.%, the ash content removal rate is 95%, and the ash content is 30ppm.

[0032] γ-neutral alumina was activated at 490°C for 6h, cooled to 20°C, added with 1.5 wt.% deionized water, mixed evenly, and then added to the chromatographic column. Dilute the clarified oil with a small amount of benzene and add it to the chromatographic column. Use benzene-ethanol with a volume ratio of 8:2 as the mobile phase to flush the stationary phase; continue to use benzene-ethanol with a volume ratio of 2:8 as the mobile phase to flush the stationary phase. Rinse dosage 1mL / g Al 2 O 3 , the elution phase was obtained, and the whole process was carried out at a constant temperature of 50 °C. The aromatic-rich component was obtained by taking the elution phase and evaporated the solvent, and the yield of the aromatic-rich compone...

Embodiment 2

[0036] Using catalytic cracking oil slurry as raw material and using inorganic membrane filtration to obtain clarified oil, wherein the yield of clarified oil is 90wt.%, the ash content removal rate is 95%, and the ash content is 30ppm.

[0037] The stationary phase in the column is γ-neutral alumina, activated at 490°C for 6h, cooled to 30°C, added with 1.5wt.% deionized water, mixed evenly, and then added to the chromatographic column. Dilute the clarified oil with a small amount of benzene and add it to the chromatographic column. Use n-heptane as the mobile phase to flush the stationary phase; continue to use toluene as the mobile phase to flush the stationary phase, and the amount of flushing agent is 1mL / g Al 2 O 3 , the elution phase was obtained, and the whole process was carried out at a constant temperature of 50 °C. The aromatic-rich component was obtained after the elution phase was evaporated to remove the solvent, and the yield of the aromatic-rich component was...

Embodiment 3

[0041] Taking medium and low temperature coal tar as raw material, adding 1 wt.% of market-oriented settling aids, mixing uniformly, and then settling at 90 °C for 24 hours, and taking the upper clarified oil, the yield of clarified oil was 90 wt.%, and the ash removal rate was 90 wt.%. 90%, the ash content is 90ppm.

[0042] The stationary phase in the column is γ-neutral alumina, activated at 450°C for 6h, cooled to 20°C, added with 1.5wt.% deionized water, mixed evenly, and then added to the chromatographic column. Dilute the clarified oil with a small amount of benzene and add it to the chromatographic column. Use benzene-ethanol with a volume ratio of 10:0 as the mobile phase to flush the stationary phase; continue to use benzene-ethanol with a volume ratio of 9:1 as the mobile phase to flush the stationary phase. Rinse dosage 1mL / g Al 2 O 3 , the elution phase was obtained, and the whole process was carried out at a constant temperature of 50 °C. The aromatic-rich com...