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Continuous aromatization and catalyst regeneration device and method thereof

An aromatization fluidized bed and catalyst technology, applied in the field of catalyst regeneration and catalyst continuous regeneration device, can solve the problems of low strength, no detailed hydrocarbon aromatization and catalyst, no catalyst composition report, etc., and achieve cost Low cost, low maintenance cost, small equipment effect

Active Publication Date: 2008-08-20
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is also no detailed C 1 -C 2 Operation method of hydrocarbon aromatization and catalyst regeneration
At the same time, scientific research on catalysts is still focused on the research of pure metals and molecular sieves. Due to the low strength of molecular sieves (structural compounds such as silicon, aluminum and phosphorus), they cannot meet the severe gas-solid turbulent wear and frequent reactions in the fluidized bed. In the process of regeneration, there is no report on the catalyst composition suitable for fluidized bed and solid transport operation

Method used

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  • Continuous aromatization and catalyst regeneration device and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The catalyst is prepared, wherein the metal content is 4.5% molybdenum, 3% gallium, and 0.1% ruthenium, the 0.5nm pores in the molecular sieve are controlled to be 70%, the molecular sieve content is 65%, and the Mohs hardness of the final catalyst is controlled to be greater than 6.5. The catalyst is loaded into the aromatization fluidized bed reactor, and the temperature of the aromatization reactor is raised to 750°C by exchanging heat with high-temperature helium at 800°C. Feed 100% methane feed gas, control methane space velocity to 1000ml / gcat / h, and operate pressure to 0.1MPa. When the catalyst activity drops to 95% of its highest active point, the pressure of the regeneration reactor (diameter, height being 2 / 3, 2 / 3 of the aromatization reactor) is guaranteed to be slightly positive pressure, and under anaerobic state, the 1 / 5 of the catalyst is transported to the catalyst regenerator through the transfer pipeline. After the transportation is completed, use met...

Embodiment 2

[0038] Prepare the catalyst, wherein the metal content is 1.2% molybdenum, 5% zinc, 1% tungsten, control the molecular sieve containing silicon, the 0.5nm pores of aluminum are 50%, the molecular sieve content is 70%, and the Mohs hardness of the final catalyst is controlled to be greater than 5 . The catalyst is loaded into the aromatization fluidized bed reactor, and the temperature of the aromatization reactor is raised to 500°C by exchanging heat with high-temperature argon at 700°C. Feed mixed feed gas of ethylene (50%) and ethane (50%), control the total space velocity to 4000ml / gcat / h, and operate the pressure to 0.1MPa. When the catalyst activity drops to 98% of its highest active point, the pressure of the regeneration reactor (diameter, height being 2 / 3 and 1 / 2 of the aromatization reactor) is guaranteed to be slightly positive pressure, and under anaerobic state, the 1 / 8 of the catalyst is delivered to the catalyst regenerator through the delivery pipeline. After ...

Embodiment 3

[0040] Prepare the catalyst, wherein the metal content is 0.02% platinum 6% gallium, 0.3% nickel, 0.7% iron, control silicon, the pore of 0.5nm in the molecular sieve of aluminum is 70%, the molecular sieve content is 55%, control the Mohs of the final catalyst The hardness is greater than 7. The catalyst is loaded into the aromatization fluidized bed reactor, and the temperature of the aromatization reactor is raised to 750°C by exchanging heat with 900°C high-temperature flue gas. Pass into acetylene (20%), methane (45%), H 2(10%) and CO (25%) mixed feed gas, the total space velocity is controlled to 300ml / gcat / h, and the operating pressure is 0.5MPa. When the catalyst activity drops to 95% of its highest active point, the pressure of the regeneration reactor (diameter, height being 1 / 3 of the aromatization reactor, 1) is guaranteed to be slightly positive pressure, and under anaerobic state, the pressure of 1 / The catalyst of 10 is transported to the catalyst regenerator ...

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Abstract

The invention discloses and belongs to the chemical equipment field, which more particularly relates to a C1-C2 hydrocarbon or methanol aromatization and catalyst regeneration fluidized bed device (comprising an aromatization fluidized bed, a catalyst continuous regeneration fluidized bed, a pipeline used for catalyst transportation and a solid transportation device which are arranged between the two fluidized beds), and an aromatization catalyst which is suitable for the fluidized bed operations and the operation methods of aromatization reaction, catalyst regeneration and the device. The device, the catalyst and the method are used for regulating the coking status of the catalyst in an aromatization reactor at any time, thus achieving the aim of transforming the C1-C2 hydrocarbon or the methanol continuously and efficiently and generating aromatics with high selectivity. The C1-C2 hydrocarbon or methanol aromatization and catalyst regeneration fluidized bed device of the invention with adjustable catalyst activity and selectivity can improve the purity and yield of the aromatics, can lead the aromatization reactor operates continuously without stopping at the same time, can improve the strength of aromatics production, and lower the operation cost of the catalyst regeneration when stopping and restarting the whole system.

Description

technical field [0001] The invention relates to the technical field of chemical equipment and catalyst treatment, in particular to C 1 -C 2 The invention relates to a device for the reaction of preparing aromatic hydrocarbons through aromatization and the continuous regeneration of the catalyst, and a method for regenerating the catalyst. Background technique [0002] Aromatics are one of the most important basic chemicals. In the traditional chemical route, aromatics are mainly obtained from petroleum refining and coal dry distillation. The aromatic hydrocarbons obtained by the petroleum route have high purity and are suitable for the preparation of various high-quality chemicals. The aromatics obtained from the coal route are relatively low in quality due to thiophene impurities, and their application is limited. With the increasing shortage of petroleum resources, the supply of aromatics is in a tense trend, and the price remains high, which greatly increases the produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C1/20C07C2/00C07C15/02B01J38/32B01J29/90
CPCY02P20/584
Inventor 骞伟中魏飞魏彤黄河孙玉建田涛李琰汪展文金涌
Owner TSINGHUA UNIV
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