Method for extracting polycyclic aromatic hydrocarbon compound from petroleum coke
A technology for polycyclic aromatic hydrocarbons and petroleum coke, which is applied in the field of extraction of polycyclic aromatic hydrocarbons in petroleum coke, and can solve the problems of carbon disulfide easily polluting the environment and low energy utilization efficiency
Active Publication Date: 2018-09-25
SHANDONG JINGBO PETROCHEM
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Problems solved by technology
[0003] At present, petroleum coke consumption is generally only used in electrolytic aluminum industry and as fuel, not only the energy utilization efficiency is low, but also the carbon disulfide produced by combustion is easy to pollute the environment
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Embodiment 1
[0042] (1) Screening of small coke: Use a ball mill to grind petroleum coke into small coke, screen with a 200-mesh sieve, remove coke with a diameter greater than 200 mesh (particle size > 75 μm), and then put the screened coke in the Dry in a vacuum oven at 100°C for 48 hours to ensure that the small cokes are fully dried and avoid affecting subsequent tests.
[0043] (2) Solvent extraction: put 1g of small coke sample in a modified Soxhlet extractor, put 400mL of n-hexane in a flask as an extraction agent, and then put the flask in a heating mantle for primary extraction at 75°C , the primary extraction is a continuous process, the extraction time is more than 10 days, more preferably 15 days, the obtained primary extract is then transferred to the buffer tank by vacuum filtration, and the extract in the buffer tank is transferred out with a flask, The excess solvent was removed under normal pressure with a rotary evaporator, and concentrated to 3 mL to obtain the first-sta...
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Abstract
The invention provides a method for extracting a polycyclic aromatic hydrocarbon compound from petroleum coke. The method includes the following steps: drying petroleum coke to obtain pretreatment petroleum coke; performing primary Soxhlet extraction on the pretreatment petroleum coke and n-hexane to obtain a n-hexane extract and primary residues; and performing secondary Soxhlet extraction on theprimary residues and carbon disulfide to obtain a carbon disulfide extract and processed petroleum coke, the carbon disulfide extract including a polycyclic aromatic hydrocarbon compound. The methodperforms stepwise extraction on the petroleum coke by adopting the n-hexane and carbon disulfide extract with different polarities; the disengaging of soluble small molecule compounds on a petroleum coke structure in the petroleum coke can be realized through primary n-hexane extraction, so that the interference of small molecule compounds on secondary extraction can be avoided; and the enrichmentof the polycyclic aromatic hydrocarbon compound in the petroleum coke can be achieved through secondary carbon disulfide extraction, and therefore, the method can be provided for the realization of the high added value and non-fuel utilization of the petroleum coke.
Description
technical field [0001] The invention relates to the technical field of petroleum coke, in particular to a method for extracting polycyclic aromatic hydrocarbon compounds in petroleum coke. Background technique [0002] Petroleum coke is a by-product obtained from various residues and heavy oils produced in the crude oil refining process through the delayed coking process. Petroleum coke generally has a metallic luster and is a black or dark black solid in appearance. It is made of tiny graphite Columnar, granular or needle-like high-carbon materials formed by crystallization. From the perspective of composition, petroleum coke mainly includes polycyclic aromatic hydrocarbons, long-chain fatty condensation polymers, a small amount of low-molecular organic matter and a small amount of inorganic matter. [0003] At present, petroleum coke consumption is generally only used in the electrolytic aluminum industry and as fuel. Not only is the energy utilization efficiency low, but...
Claims
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IPC IPC(8): C01B32/05B01D11/02
CPCB01D11/0284B01D11/0288
Inventor 马巍巍栾波王耀伟
Owner SHANDONG JINGBO PETROCHEM