Method for oil product desulfurization by coupling cobalt-containing ionic liquid with persulfate
A technology of persulfate and ionic liquid, which is applied in the petroleum industry, processing hydrocarbon oil, refining hydrocarbon oil, etc., can solve the problems of storage, transportation, inconvenient use, active chemical properties, easy decomposition and failure, etc. The effect of low price and excellent desulfurization effect
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[0029] 1), carry out the preparation of cobalt-containing ionic liquid
[0030] Step 1, under the protection of nitrogen, the with Cl-R 2 According to the molar ratio of 1:1~1:1.1, react at 50~90°C for 12~48h to obtain white crystals, and obtain monoimidazolium chloride salt by filtering, washing and vacuum drying at 50°C spare;
[0031] Step 2. Add cobalt chloride crystals to monoimidazolium chloride salt, the molar ratio is 1:1, and react at 105-135°C for 1-10 hours under constant stirring to obtain a blue viscous mono Cobalt imidazolium chloride salt ionic liquid spare;
[0032] The reaction course of above-mentioned two steps is as follows:
[0033]
[0034] The preparation of cobalt-containing ionic liquid can also adopt the following methods:
[0035] Step 1, under the protection of nitrogen, the with Cl 2 -R 2 According to the molar ratio of 2:1~2:1.1, react at 50~90°C for 12~48h to obtain white crystals, and obtain bis-imidazolium chloride salt by filteri...
Embodiment 1
[0053] Under the protection of nitrogen, take 1mol methylimidazole and 1.05mol 1-chlorobutane into a round bottom flask and stir, heat the oil bath to 75°C, react for 24h, a large amount of solid products appear, filter, wash with ethanol, and vacuum dry at 50°C to obtain Pure 1-methyl-3-butylimidazolium chloride ionic liquid solid. Weigh 0.8mol pure 1-methyl-3-butylimidazolium chloride ionic liquid solid and 0.8mol cobalt chloride hexahydrate solid, put them into a round bottom flask, heat to 110°C, the color of the solid mixture changes from pink to Dark blue viscous liquid, this liquid is 1-methyl-3-butylimidazolium cobalt chloride, which is the required monocobalt-containing ionic liquid. The specific chemical reaction equation is as follows:
[0054]
[0055] Getting 6g of fuel oil with an initial sulfur content of 500ppm, and 2g of the prepared ionic liquid containing monocobalt imidazolium chloride salt are mixed and extracted, and after that, adding 1.0g of potassi...
Embodiment 2
[0058] Under the protection of nitrogen, take 1mol 1-butylimidazole and 1.1mol 1-chlorobutane into a round bottom flask and stir, heat the oil bath to 50°C, react for 46h, a large amount of solid products appear, filter, wash with ethanol, and vacuum dry at 50°C Pure 1-butyl-3-butylimidazolium chloride ionic liquid solid was obtained. Weigh 0.8mol pure 1-butyl-3-butylimidazolium chloride ionic liquid solid and 0.8mol cobalt chloride hexahydrate solid, put them into a round bottom flask, heat to 105 °C, the color of the solid mixture changes from pink to Dark blue viscous liquid, this liquid is 1-butyl-3-butyl cobalt chloride, which is the desired monocobalt-containing imidazolium chloride salt ionic liquid. The specific chemical reaction equation is as follows:
[0059]
[0060] Getting 10g of fuel oil with an initial sulfur content of 500ppm, and 1g of the obtained monocobalt imidazolium chloride salt ionic liquid containing mixed extraction treatment, after that, adding ...
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