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Process method for producing aromatic hydrocarbon by moving bed continuous reforming

A process method and moving bed technology, applied in the field of aromatic hydrocarbon production, can solve the problems of low catalyst activity, low reaction efficiency, slow catalyst renewal speed, etc., and achieve the goal of improving overall activity, improving economic benefits, and improving market adaptability and resilience. Effect

Inactive Publication Date: 2011-05-11
赵丽
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the fourth reactor with the longest reaction time, the catalyst renewal rate is slow (because of the large reactor volume), and the catalyst activity is low, so the reaction efficiency is low

Method used

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  • Process method for producing aromatic hydrocarbon by moving bed continuous reforming
  • Process method for producing aromatic hydrocarbon by moving bed continuous reforming

Examples

Experimental program
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Embodiment 1

[0027] In the embodiment, the catalysts used in the prehydrogenation of naphtha raw materials are as follows: Mo-Ni / alumina catalyst uses the FH-40A catalyst developed by Fushun Petrochemical Research Institute, Mo-Co / alumina catalyst uses Fushun Petrochemical Research Institute The developed FDS-4A catalyst and W-Mo-Ni-Co / alumina catalyst use the FH-40C catalyst developed by Fushun Petrochemical Research Institute. The main properties of the catalyst are listed in Table 1. FH-40A catalyst and FDS-4A catalyst are mixed in proportion to form the first catalyst bed (bed Ⅰ), FH-40C catalyst forms the second catalyst bed (bed Ⅱ), and the reaction materials pass through bed Ⅰ and bed in turn. II. There are mainly three types of naphtha raw materials used, and the specific properties are shown in Table 2. Raw material 1 is straight run naphtha of a certain domestic crude oil, raw material 2 is straight run naphtha of imported crude oil, and raw material 3 is a mixture of imported ...

Embodiment 1～3

[0033] 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.

[0034] 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.

[0035] Table 3 Main process conditions and properties of hydrogenated oil in Examples 1-3.

[0036] Example

[0037] Reaction pressure / MPa

Embodiment 4

[0039] 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. The specific conditions and results are shown in Table 4.

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Abstract

The invention discloses a process method for producing aromatic hydrocarbon by moving bed continuous reforming. The process method comprises the following steps: carrying out prehydrogenation on a naphtha raw material; carrying out catalytic reforming on prehydrogenation generating oil so as to convert at least partial alkane and cycloparaffin into the aromatic hydrocarbon; and separating the aromatic hydrocarbon from the catalytic reforming generating oil, wherein a moving bed continuous reforming technology is adopted in the catalytic reforming process, four reaction areas are arranged, reaction raw materials successively pass through the four reaction areas, the aromatic hydrocarbon product is separated from reaction effluent in the fourth reaction area, a catalyst discharged from the fourth reaction area is recycled, and the recycled catalyst respectively enters the first reaction area and the fourth reaction area. Compared with the prior art, the process method disclosed by the invention has the advantages of high reaction efficiency, high aromatic hydrocarbon yield, prominent device economy and the like.

Description

technical field [0001] The invention relates to a process method for producing aromatic hydrocarbons by using materials containing paraffins and / or naphthenes as raw materials and adopting catalytic reforming technology, especially a process method for producing aromatics by adopting moving bed continuous reforming. 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 a...

Claims

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Application Information

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