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Preparation method of gasoline extraction and desulfurization agent

A desulfurization agent and extraction technology, which is applied in the field of preparation of gasoline extraction desulfurization agent, can solve the problems of difficult to achieve industrialization and poor desulfurization effect, and achieve the effects of low cost, stable air and water, and high stability

Inactive Publication Date: 2011-05-04
JINAN DEV ZONE XINGHUO SCI & TECH RES INST
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Problems solved by technology

Literature [Zhang Shuyan, Cao Zubin, Zhao Dezhi, et al. Research on desulfurization of FCC gasoline by complexation extraction of room temperature ionic liquids. Refining Technology and Engineering, 2005, 35(5): 35□37.] with AlCl 3 The FCC gasoline desulfurization research was carried out on the type ionic liquid, and it was believed that the sulfide in gasoline had a complex reaction with the metal-based chloride. From the results, this ionic liquid has a high desulfurization efficiency, but it is very sensitive to air and water , it needs to be carried out under the condition of isolating air and water, it is difficult to meet the requirements of industrialization
[0006] At present, there have been many studies on imidazole ionic liquids, but there are few reports on the use of pyridine ionic liquids in gasoline desulfurization. .Journal of Fuel Chemistry, 2007,35(3):293-296.] investigated N-butylpyridine nitrate, N-ethylpyridine nitrate, N-butylpyridine tetrafluoroborate, N-ethylpyridine Pyridine tetrafluoroborate, N-butylpyridine acetate, N-ethylpyridine acetate, a total of six pyridine-based ionic liquids on the removal of model compounds and sulfur compounds in gasoline, the results show that the six In the process of desulfurization of model compounds, N-butylpyridine tetrafluoroborate ionic liquid has better desulfurization effect, and the desulfurization rate is 45.5%, and N-ethylpyridine tetrafluoroborate ionic liquid has the worst desulfurization effect

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  • Preparation method of gasoline extraction and desulfurization agent
  • Preparation method of gasoline extraction and desulfurization agent
  • Preparation method of gasoline extraction and desulfurization agent

Examples

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Embodiment 1

[0018] Add 0.30 mol of pyridine, 0.18 mol of bromododecane and 40 ml of toluene into a closed Erlenmeyer flask, and react at room temperature for 10 h. After the reaction was completed, the residual solvent and unreacted raw materials were distilled off under reduced pressure, washed twice with ethyl acetate, and dried in vacuo to obtain a white solid. Take 0.3mol-dodecylpyridinium bromide and 0.35mol potassium hexafluorophosphate, add 300ml acetone into a round-bottomed flask, stir at room temperature for 10 hours, after standing still, the reaction solution separates into two phases, pour out the light phase, and repeat with distilled water After washing the heavy phase and separating the liquids, the heavy phase is vacuum-dried to a constant weight to remove water, and the light yellow product N-dodecylpyridinium hexafluorophosphate is finally obtained. According to the mass ratio of 3:1, the gasoline model and ionic liquid with a sulfur content of 1350 μg / g were stirred on...

Embodiment 2

[0022]Add 0.30 mol of pyridine, 0.36 mol of bromododecane and 80 ml of toluene into a closed Erlenmeyer flask, and react at room temperature for 24 hours. After the reaction was completed, the residual solvent and unreacted raw materials were distilled off under reduced pressure, washed twice with ethyl acetate, and dried in vacuo to obtain a white solid. Take 0.3 mol of dodecylpyridinium bromide and 0.36 mol of potassium hexafluorophosphate, add 300 ml of acetone into a round bottom flask, stir at room temperature for 15 hours, after standing still, the reaction solution separates into two phases, pour out the light phase, and repeat the process with distilled water. After washing the heavy phase and separating the liquids, the heavy phase is vacuum-dried to a constant weight to remove water, and the light yellow product N-dodecylpyridinium hexafluorophosphate is finally obtained. According to the mass ratio of 3:1, the gasoline model and ionic liquid with a sulfur content of...

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Abstract

The invention relates to a preparation method of a gasoline extraction and desulfurization agent, belonging to the technical field of gasoline extraction and desulfurization. The preparation method comprises the following steps of: removing sulfur compounds in gasoline by using ionic liquid N-dodecyl pyridine hexafluorophosphate as an extracting agent, firstly preparing N-dodecyl pyridine bromide by using pyridine and bromododecane as raw materials, and then synthesizing a required iconic liquid through ion exchange with potassium hexafluorophosphate under certain conditions. The iconic liquid not only has mild reaction conditions, short reaction time and higher gas desulfurization rate and recovery rate and can properly reduce olefins and aromatic hydrocarbons in oils at the same time, but also is convenient to prepare, higher in yield and more stable in water and air. Thus, the invention provides a basis for industrial production.

Description

technical field [0001] The invention relates to a method for desulfurizing gasoline. The ionic liquid has good extraction ability for thiophene substances, and is in two liquid phases that are incompatible with gasoline. There is no cross-contamination problem of oil products. The ionic liquid can be extracted into the ionic liquid The thiophenes in the extract can be regenerated and recycled by solvent washing or distillation, and the extraction operation conditions are normal temperature and pressure. Background technique [0002] Harmful substances emitted by automobiles have become one of the main sources of air pollution in major cities around the world, and the production of environmentally friendly and clean vehicle fuel oil has become the shared responsibility of major oil refining industries. The sulfides in gasoline exist in the form of hydrogen sulfide, mercaptan, sulfide, disulfide, thiophene, disulfide, thiophene and its derivatives. These sulfides not only lea...

Claims

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Application Information

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IPC IPC(8): C07D213/20C10G21/24
Inventor 车春玲
Owner JINAN DEV ZONE XINGHUO SCI & TECH RES INST
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