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Functionalized ion liquid and application thereof

An ionic liquid, functionalized technology, applied in the field of chemistry, can solve pollution and other problems, achieve the effect of high absorption efficiency, simple regeneration and less loss

Inactive Publication Date: 2015-06-03
NINGBO HAOCHENG SYNTHETIC LEATHER COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method has the advantages of high desulfurization efficiency, but due to the solid absorbent ZnO-TiO 2 -Al 2 o 3 Regeneration is a big problem, while solving hydrogen sulfide pollution, it also produces a lot of solid waste

Method used

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  • Functionalized ion liquid and application thereof
  • Functionalized ion liquid and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0032] At room temperature, pass 1 mol of octadecyltrihexylphosphonium bromide through an ion exchange column [DOWEX MONOSPHERE 550A (OH)] to produce a strongly basic ionic liquid; then mix the resulting strongly basic ionic liquid with 3 mol of 5-methyl-3,4 -Dihydropyrimidin-2-one sodium salt was mixed in 4mol ethanol solvent, stirred at room temperature for 36 hours to undergo proton transfer reaction; water; finally dry at 80°C in a decompression drying oven for 12 hours to obtain functionalized ionic liquid 1, whose structural formula is:

[0033] , the same below.

[0034] Under the condition of 15°C, the simulated waste gas containing different partial pressures of hydrogen sulfide was passed through the gas washing bottle filled with 1mol functionalized ionic liquid 1, and the residence time of the absorption process was adjusted to 15 minutes. Hydrogen absorption, the results are shown in Table 1.

[0035] Table 1

[0036] Example h 2 S partial pressu...

Embodiment 6～10

[0039] At room temperature, pass 1mol of octadecyltrihexylphosphonium bromide through an ion exchange column [DOWEX MONOSPHERE 550A (OH)] to produce a strongly basic ionic liquid; 2-ketone sodium salt was mixed in 4mol ethanol solvent, stirred at room temperature for 36 hours to undergo proton transfer reaction; then the obtained reactant was depressurized at 80°C for 2 hours in a rotary evaporator, and ethanol and the water generated by the reaction were distilled off; Dry in a drying oven at 80°C for 5 hours to obtain functionalized ionic liquid 2, whose structural formula is:

[0040] , the same below.

[0041] Under the condition of 20°C, the simulated exhaust gas containing different partial pressures of hydrogen sulfide was passed into 1mol functionalized ionic liquid 2 for absorption experiment, the residence time was 20 minutes, and after 20 minutes of absorption, the absorption amount of hydrogen sulfide by the ionic liquid was measured. The results are shown in Ta...

Embodiment 11～15

[0045] At room temperature, pass 1 mol of hexyl tripentylphosphonium bromide through an ion exchange column [DOWEX MONOSPHERE 550A (OH)] to produce a strong basic ionic liquid; then mix the resulting strong basic ionic liquid with 3 mol of 5-methyl-3,4- Hydropyrimidin-2-one sodium salt was mixed in 4mol ethanol solvent, stirred at room temperature for 24 hours to undergo proton transfer reaction; then the obtained reactant was depressurized at 60°C in a rotary evaporator for 6 hours, and ethanol and the water generated by the reaction were distilled off; Finally, the functionalized ionic liquid 3 was obtained by drying at 60° C. in a decompression drying oven for 10 hours, and its structural formula was:

[0046] , the same below.

[0047] Under the condition of 15°C, the simulated exhaust gas containing different partial pressures of hydrogen sulfide was passed into 1mol functionalized ionic liquid 3 for absorption experiment, the residence time was 5 minutes, and after 20 ...

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Abstract

The invention discloses a functionalized ion liquid, wherein the structural formula of positive ions is FORMULA or FORMULA, in which the -C6H13, -C5H11 and -C18H37 are straight-chain paraffin, and the structural formula of negative ions is FORMULA or FORMULA, wherein the ion liquid can be used for depriving hydrogen sulfide in waste gas. The temperature of the absorbed waste gas is 5-30 DEG C, the partial pressure of hydrogen sulfide gas in the waste gas is 0.001-0.1MPa, the detention time of the waste gas in the ion liquid is 5-30 min, and the desorption temperature is 70-160 DEG C. Compared with the traditional technology of depriving hydrogen sulfide gas in waste gas, the functionalized ion liquid is of absorption efficiency, achieves desorption through simple heating, can be reused simply after desorption without generating wastes after absorption, and solves the problem of waste treatment after absorption, so that the absorption cost is reduced.

Description

technical field [0001] The invention relates to the technical field of chemistry, in particular to a functionalized ionic liquid for absorbing hydrogen sulfide and its application. Background technique [0002] Hydrogen sulfide is a corrosive acidic gas. A large amount of harmful hydrogen sulfide gas will be produced in the production process of chemical industries such as petroleum refining, which threatens personal safety and will cause corrosion of metal pipes and equipment, causing more serious safety hazards. , if it is discharged directly, it will cause serious pollution to the atmospheric environment. [0003] There are many methods for removing hydrogen sulfide in industry, among which the wet oxidation method with outstanding advantages is widely used. In wet oxidation desulfurization, hydrogen sulfide is absorbed by the alkaline absorption liquid to generate hydrogen sulfide and sulfide, which are oxidized into sulfur and water under the action of a catalyst, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F9/54C07D233/70B01D53/14B01D53/52
Inventor 蒋智猛
Owner NINGBO HAOCHENG SYNTHETIC LEATHER COMPANY