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Process for producing arene through continuous reforming

A process method and aromatics technology, applied in the field of continuous reforming technology to produce aromatics, can solve the problems of solid waste generation, low product yield, and high chemical consumption, so as to improve economic benefits, reduce investment and operating costs, and improve reaction efficiency effect

Inactive Publication Date: 2013-11-06
赵丽
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The methods for removing dilute hydrocarbons in reformed oil generally include clay refining method and hydrogenation method. The clay refining method is not recommended due to the disadvantages of low product yield, high consumption of chemicals, and generation of solid waste.

Method used

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  • Process for producing arene through continuous reforming

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0035] Adopt the method of the present invention, raw material and hydrogen pass through bed I and bed II successively under hydrogenation condition, bed I is the mixed catalyst bed of Mo-Ni type catalyst and Mo-Co type catalyst, bed II is W- Mo-Ni-Co type catalyst.

[0036] Different catalyst ratios can be used to effectively process different types of raw materials, so that the oil produced by hydrogenation meets the requirements of catalytic reforming feed. The specific process conditions and reaction results are shown in Table 3.

[0037] Table 3 Main process conditions and properties of hydrogenated oil in Examples 1-3.

[0038] Example 1 2 3 Raw oil raw material 1 raw material 2 raw material 3 catalyst bed FH-40A and FDS-4A volume ratio 1：1 1：3 2：1 Bed I / Bed II volume ratio 1：1 2：1 1：2 Process conditions Reaction pressure / MPa 1.6 1.6 1.6 Reaction temperature / ℃ 270 300 300 Volumetric ...

Embodiment 4

[0040] According to the catalyst compounding scheme in Example 1, different raw materials can be processed at a higher space velocity, and qualified catalytic reforming raw materials can be obtained.

Embodiment 5

[0048] The hydrogenation products of the three raw materials in Example 4 were used for catalytic reforming, and at least part of the paraffins and naphthenes were converted into aromatics. The catalytic reforming is a continuous reforming experimental device. The continuous reforming uses four moving bed reactors and a catalyst regeneration system. The catalytic reforming catalyst is the RC-011 continuous reforming catalyst developed by the Sinopec Petrochemical Research Institute. The four reaction The effective reaction volume of the device is 10:15:25:50. Reaction pressure 0.35MPa, hydrogen oil ratio 700Nm 3 .m -3 , volumetric space velocity 2.0h -1 , the average bed reaction temperature is 508°C, and the reaction results of different raw materials are shown in Table 5.

[0049] Table 5 Experimental results of catalytic reforming of different hydrogenated naphthas.

[0050] raw material raw material 1 raw material 2 raw material 3 Liquid yield / mass...

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Abstract

The invention discloses a process for producing arene through continuous reforming. The process comprises the following steps: pre-hydrogenation treatment is performed on a naphtha raw material, catalytic reforming is performed on the oil generated through pre-hydrogenation treatment so that at least a part of paraffin and a part of cycloparaffin are converted to arene, selective hydrodealkylation is performed on the oil generated through catalytic reforming, the oil generated through selective hydrogenation is separated to obtain arene; a part of the gas with rich hydrogen, generated by catalytic reforming device is circulated to the catalytic reforming device and the residual gas is pressurized to perform selective hydrogenation reaction with the oil generated through catalytic reforming to remove the olefin in the oil, wherein the selective hydrogenation of the oil generated through catalytic reforming adopts hydrogen single-pass flow, the effluent of the selective hydrogenation reaction is separated to gaseous phase and liquid phase; a part of gaseous phase is used as the hydrogen make-up of the naphtha raw material pre-hydrogenation device, the rest part is discharged out of the device; and the liquid phase is used for the separation of the arene product. Compared with the prior art, the method disclosed by the invention has the advantages that the raw material adaptability is high, the byproduct discharged to the outside has high hydrogen content and the economy of the catalytic reforming device is high and the like.

Description

technical field [0001] The invention relates to a process for producing aromatic hydrocarbons by using materials containing paraffins and / or naphthenes as raw materials and adopting continuous reforming technology. Background technique [0002] As the market demand for petrochemical products continues to increase, the demand for aromatic products such as benzene, toluene and xylene (collectively referred to as BTX) is growing rapidly. At present, using naphtha containing paraffins and / or naphthenes as raw material, the production of BTX by catalytic reforming process is an important means to obtain aromatics. [0003] The process of producing BTX from naphtha generally includes pre-hydrogenation of naphtha raw material, catalytic reforming of hydrogenated oil, and extraction of aromatics from reformed products. Naphtha raw materials generally include straight-run naphtha and secondary processed naphtha. As the quality of crude oil worldwide continues to deteriorate and beco...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G69/08
Inventor 赵丽
Owner 赵丽
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