Method for deacidizing and desulfurizing diesel fuel oil
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A technology for diesel and oil products, applied in the petroleum industry, refined hydrocarbon oil, etc., which can solve problems such as low desulfurization rate, large investment, and harsh operating conditions
Active Publication Date: 2008-03-12
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology
[0013] The reduction desulfurization process provided by the invention is especially proposed for the problems of large investment, harsh operating conditions and low desulfurization rate in the existing desulfurization technology
Method used
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Embodiment 1
[0033] 0.005mol NiCl 2Mix with 0.371mol methanol, stir well, add 20ml diesel sample (sulfur content about 941μg / g), slowly add 0.007mol NaAlH 4 , react at 10°C and normal pressure, pour the reacted mixture into a separatory funnel and let it stand for stratification, and take the oil layer to obtain the desulfurized oil.
[0034] According to GB / T 11140, the sulfur content of diesel oil is reduced from 941 μg / g to 256 μg / g, the desulfurization rate is 72.8%, and the oil yield is 90.3%.
Embodiment 2
[0036] 0.005mol FeSO 4 Mix with 0.371mol tetrahydrofuran, stir well, add 20ml diesel sample (sulfur content is about 941μg / g), slowly add 0.007mol LiAlH 4 , react at 10°C and normal pressure, pour the reacted mixture into a separatory funnel and let it stand for stratification, and take the oil layer to obtain the desulfurized oil.
[0037] According to GB / T 11140, the sulfur content of diesel oil is reduced from 941 μg / g to 280 μg / g, the desulfurization rate is 70.2%, and the oil yield is 91.2%.
Embodiment 3
[0039] 0.005mol PtCl 2 Mix with 0.371mol methanol, stir well, add 20ml diesel sample (sulfur content about 941μg / g), slowly add 0.007mol LiBH 4 , react at 10°C and normal pressure, pour the reacted mixture into a separatory funnel and let it stand for stratification, and take the oil layer to obtain the desulfurized oil.
[0040] According to GB / T 11140, the sulfur content of diesel oil is reduced from 941 μg / g to 295 μg / g, the desulfurization rate is 68.6%, and the oil yield is 90.2%.
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Abstract
The invention relates to a method for reducing and desulfurizing diesel oil, which comprises such procedures as mixing diesel oil with proton solvent containing divalent transitional metal salt, then adding reducing agent, keeping under 10-40 DEG C to complete reaction; after reaction, keeping still for layering, collecting the oil layer and getting the desulfurized oil. The divalent transitional metal salt is a hydrochloride and sulfate of d-zone metals in the periodic table of elements; the proton solvent is water, methanol, alcohol or oxolane; the reducing agent is tetrahydro boron potassium, aluminum lithium hydride, tetrahydro boron sodium, aluminum sodium hydride or tetrahydro boron lithium. The mole proportion of the divalent transitional metal salt to the proton solvent is 0.1-10:100; the mole proportion of the reducing agent to the divalent transitional metal salt is 100:10-80; the proportion by weight of the reducing agent to the diesel oil is 1-30:100. The invention can be carried out under normal temperature and normal pressure, the operation condition is moderate, the reaction time is short, and the invention can effectively reduce the sulphur content in the diesel oil, and has no special requirement on the reaction devices; the invention is applicable for catalyzed and cracked diesel oil, hydrogenated and cracked diesel oil, straight-run diesel oil or their combinations.
Description
technical field [0001] The invention relates to a method for reducing and desulfurizing diesel oil to achieve deep desulfurization. Background technique [0002] At present, the research on desulfurization treatment of petroleum oil can be roughly divided into two categories: hydrodesulfurization and non-hydrodesulfurization. [0003] Although hydrodesulfurization can effectively reduce the sulfur content of petroleum products within a certain range, it has the problems of large equipment investment, high operating costs, and low removal rate of polycyclic aromatic sulfur compounds. [0004] In view of the problems existing in hydrodesulfurization, a lot of research work has been done on non-hydrodesulfurization at home and abroad. and other desulfurization technologies. [0005] Acid-base refining is a kind of oil refining method that appeared earlier, such as mixing 10-30% sodium hydroxide aqueous solution with oil in the process of alkali washing. The lye has basically...
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