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Method for removing thiophenic sulfur from coking benzene

A technology for coking benzene and thiophene sulfur, which is applied in chemical instruments and methods, organic chemistry, hydrocarbons, etc., to achieve the effects of low investment cost, broad application prospects and simple operation

Inactive Publication Date: 2013-02-06
SHANXI YANGMEI FENGXI FERTILIZER IND GRPCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a method for removing thiophene sulfur in coking benzene in order to solve the problem of how to effectively remove thiophene sulfur in coking benzene in the benzene chemical industry

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0023] A method for removing thiophene sulfur in coking benzene, comprising the following steps:

[0024] (1) The fresh benzene from the fresh benzene tank is sent to the benzene heat exchanger under pressure by the fresh benzene pump, and then sent to the benzene electric heater after heat exchange in the heat exchanger. In the benzene electric heater, hydrogen and benzene vapor Mixed, heated by a benzene electric heater and gasified, then sent to the benzene desulfurization reactor;

[0025] (2) In the benzene desulfurization reactor, the temperature is controlled at 210-230°C, the pressure is 1-1.05MPa, and the space velocity is 2.5h -1 At this time, thiophene in benzene vapor is hydrogenated and converted to hydrogen sulfide under the action of catalyst NHDS-8, and hydrogen sulfide is adsorbed on the catalyst to complete the desulfurization of benzene;

[0026] (3) The desulfurized benzene vapor comes out of the desulfurization reactor and enters the benzene heat exchange...

Embodiment 2

[0029] A method for removing thiophene sulfur in coking benzene, comprising the following steps:

[0030] (1) The fresh benzene from the fresh benzene tank is sent to the benzene heat exchanger under pressure by the fresh benzene pump, and then sent to the benzene electric heater after heat exchange in the heat exchanger. In the benzene electric heater, hydrogen and benzene vapor Mixed, heated by a benzene electric heater and gasified, then sent to the benzene desulfurization reactor;

[0031] (2) In the benzene desulfurization reactor, the temperature is controlled at 225-245°C, the pressure is 0.75-1MPa, and the space velocity is 2h -1 At this time, thiophene in benzene vapor is hydrogenated and converted to hydrogen sulfide under the action of catalyst NHDS-8, and hydrogen sulfide is adsorbed on the catalyst to complete the desulfurization of benzene;

[0032] (3) The desulfurized benzene vapor comes out of the desulfurization reactor and enters the benzene heat exchanger....

Embodiment 3

[0035] A method for removing thiophene sulfur in coking benzene, comprising the following steps:

[0036] (1) The fresh benzene from the fresh benzene tank is sent to the benzene heat exchanger under pressure by the fresh benzene pump, and then sent to the benzene electric heater after heat exchange in the heat exchanger. In the benzene electric heater, hydrogen and benzene vapor Mixed, heated by a benzene electric heater and gasified, then sent to the benzene desulfurization reactor;

[0037] (2) In the benzene desulfurization reactor, the temperature is controlled at 240-260°C, the pressure is 0.9-1MPa, and the space velocity is 3h -1 At this time, thiophene in benzene vapor is hydrogenated and converted to hydrogen sulfide under the action of catalyst NHDS-8, and hydrogen sulfide is adsorbed on the catalyst to complete the desulfurization of benzene;

[0038] (3) The desulfurized benzene vapor comes out of the desulfurization reactor and enters the benzene heat exchanger. ...

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PUM

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Abstract

The invention discloses a method for removing thiophenic sulfur from coking benzene, belonging to the field of chemical industry production of benzene. The method comprises the following steps: conveying fresh benzene to a benzene heat exchanger by a fresh benzene pump under the pressurizing action, exchanging heat, conveying to a benzene electric heater, mixing hydrogen gas with benzene steam, heating and gasifying, and conveying to a benzene desulfurization reactor; enabling the temperature to be 210-260 DEG C, the pressure to be 0.75-1.05MPa and the air velocity to be 2-3h<-1> in the benzene desulfurization reactor, adding thiophene with hydrogen to be converted into hydrogen sulfide under the action of a catalyst NHDS-8, and adsorbing onto the catalyst; enabling the benzene steam after desulfurization to enter into the benzene heat exchanger so as to convert gaseous benzene into liquid benzene; and carrying out gas-liquid separation on the liquid benzene and the hydrogen in a benzene separator, decompressing the liquid benzene through an adjusting valve, conveying to a benzene process tank, separating the hydrogen through a wire mesh demister, and conveying to a hydrogen circulator for further circulation. The method is better in thiophene removal performance, is capable of reducing the thiophene content in raw materials to be in PPb level, and is low in investment cost and simple to operate.

Description

technical field [0001] The invention belongs to the field of benzene chemical production and relates to a method for removing thiophene sulfur in coking benzene. Background technique [0002] Coking benzene is an important source of fine chemical intermediates. As one of the important chemical raw materials, benzene can be obtained by refining coking benzene. my country's coking benzene resources are extremely rich. At present, about 40% to 50% of the benzene comes from coking benzene, but coking pure benzene accounts for less than 20% of the pure benzene production, and more than 80% of pure benzene comes from the production of petroleum benzene. Due to With the substantial increase in demand for benzene in the domestic market and the shortage of petroleum resources, the development of coking benzene industry has important practical significance and great economic benefits. [0003] The removal of thiophene from coking benzene usually involves chemical methods such as sulfu...

Claims

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Application Information

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IPC IPC(8): C07C15/04C07C7/163
Inventor 崔文科王小宁李波娃关亚斌王文革
Owner SHANXI YANGMEI FENGXI FERTILIZER IND GRPCO
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