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Gasoline alkylation desulfuration method

An alkylation desulfurization and gasoline technology, which is applied in the field of hydrocarbon oil refining and desulfurization, can solve problems such as the difficulty in regeneration of acidic ionic liquids, and achieve the effects of easing operating conditions, suppressing side reactions, and high desulfurization efficiency

Active Publication Date: 2007-08-01
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to regenerate acidic ionic liquids, and there are still environmental problems after being discarded.

Method used

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  • Gasoline alkylation desulfuration method
  • Gasoline alkylation desulfuration method
  • Gasoline alkylation desulfuration method

Examples

Experimental program
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Embodiment 1

[0030] This embodiment is a single reactor process, the schematic diagram of which is shown in Figure 2.

[0031] The inner diameter of the reactor is 100 mm, and the height is 1 meter. Fill 250 g of ZnCl in the fixed bed reactor 2 Ion-exchange resin catalyst A, the physical properties of the catalyst are shown in Table 1, and the temperature of the catalytic cracking gasoline is 80°C, and the liquid hourly space velocity is 3.0h -1 , the pressure is to react under the condition of 0.5MPa, the distillation range of the raw material is shown in Table 2, and simultaneously feed H 2 Keeping the reaction pressure, the reaction product is passed into the fractionation tower, where it is cut into light fraction and heavy fraction at 110°C. The output ratio of tower top and tower bottom is 7:3. The distribution of sulfur compounds in raw materials, light fraction and heavy fraction is shown in Table 3, the light fraction and the heavy fraction are mixed according to the output ratio...

Embodiment 2

[0033] This embodiment is a flow process of two reactors, the schematic diagram of which is shown in FIG. 1 .

[0034] Reactor and fractionating tower are the same as embodiment 1, in fixed bed reactor, packing contains AlCl 3 The ion-exchange resin catalyst B, catalyst physical property is shown in Table 1, feeds the catalytic cracking gasoline raw material identical with embodiment 1, feeds N simultaneously 2 Keep the reaction pressure, when the reaction temperature is 80°C, the liquid hourly space velocity is 6.0h -1 , the reaction is carried out under the condition of 1.0MPa pressure, and the reaction product is passed into the fractionation tower, and is cut into light fraction product and heavy fraction at 155°C, the output ratio of tower top and tower bottom is 8:2, raw material, light fraction and heavy fraction The distribution of sulfur compounds in the heavy fraction is shown in Table 3. The light fraction and the heavy fraction are mixed according to the output ra...

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Abstract

The invention relates to a petrol alkanization method for desulfurization. It comprises following steps: preheating raw material, introducing it into reactor, contacting with catalyst at condition of 60- 180 Deg. C, 0.1- 2.0 MPa pressure, and 0.5- 10 h-1 liquid volume hourly space velocity, feeding it intofractionating tower after reaction, cutting into light fraction product and sulfur- enriched heavy fraction at 100- 200 Deg. C; changing raw material into regenerative solvent or gas for catalyst regeneration, recovering regenerated solvent or gas for reuse, and changing into raw oil for reaction. The invention is characterized by simple process, temperate operation condition, high desulfurization rate, little loss of octane number, no obvious change of hydrocarbon component before- and -after reaction, inhibited side- reaction of alkene polymerization and aromatic hydrocarbons alkynylation.

Description

technical field [0001] The invention relates to a hydrocarbon oil refining desulfurization method, in particular to a method for removing sulfur impurities in gasoline through thiophene olefin alkylation reaction. Background technique [0002] The distillate oil produced by the secondary processing of petroleum often contains more sulfur-containing aromatic compounds, such as thiophene and its derivatives. The sulfur atom is in a stable aromatic ring, which is difficult to remove by hydrotreating. In order to achieve the purpose of desulfurization, it is necessary to increase the reaction temperature, reaction pressure and hydrogen partial pressure, but this will simultaneously lead to an increase in olefin saturation and a decrease in gasoline octane number. The alkylation desulfurization method can avoid some disadvantages of hydrodesulfurization technology. Alkylation desulfurization is mainly achieved through the following methods: firstly, thiophene sulfur compounds an...

Claims

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Application Information

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IPC IPC(8): C10G53/16
Inventor 姜蕾张占柱渠红亮毛俊义王少兵
Owner CHINA PETROLEUM & CHEM CORP
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