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Activity control method of in-situ decoking material of aromatic hydrocarbon deolefination catalyst and application thereof

A control method and catalyst technology, which are applied in the direction of catalyst regeneration/reactivation, molecular sieve catalyst, chemical instruments and methods, etc., can solve the problems of large amount of hazardous waste of catalyst, long regeneration period, large activity loss, etc., and achieve low cost and regeneration. Simple, high utilization effect

Active Publication Date: 2021-04-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In order to solve the above existing problems in the prior art, the present invention proposes an activity control method and its application for in-situ de-coking of aromatic hydrocarbon de-olefin catalysts, which mainly solves the need for external regeneration of existing de-olefin catalysts, resulting in long regeneration cycle , the large loss of activity leads to short overall life, and the problem of a large amount of hazardous catalyst waste

Method used

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  • Activity control method of in-situ decoking material of aromatic hydrocarbon deolefination catalyst and application thereof

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Embodiment 1

[0060] According to patent CN102218338A embodiment 5 prepared catalyst 100.0g containing Zr, Cu, Al, Ce, Y molecular sieve / alumina, bromine index is 950mgBr / 100g reformed oil, in 8h -1 , Under 1.9MPa, the reaction was evaluated at temperatures of 160, 170, 180, and 195°C, and the evaluation time when the outlet reached the bromine index of 150mg / 100g was 70, 90, 120, and 150 hours, respectively. Cut off the raw material for evaluation. Then, after nitrogen purging at 60°C for 10 hours, use 30-60°C pentane and hexane mixture (1:1) 500g, 3.0Mpa, 10h -1 Wash down for 24 hours, then heat up to 90°C, wherein 20% of the material enters the subsequent distillation tower, and 1% of the coke-containing material is circulated back to the decoking system for 20 hours, and the coke content of the material entering and leaving the reactor is 1.5% ( weight content) and 1.7% (weight content) and then enter the process of removing soluble coke matter: feed nitrogen and purge at 90° C. for 20...

Embodiment 2

[0063] Catalyst (containing La, Ce, P, Mg and USY molecular sieve) 100.0g prepared by CN102029180A embodiment 6 is the reformed oil of 950mgBr / 100g in bromine index, in 8h -1 , Under 1.9MPa, the reaction was evaluated at temperatures of 160, 170, 180, and 195°C, and when the bromine index at the outlet reached 150mg / 100g, the evaluation time was 58, 65, 67, and 72 hours, respectively. In-situ decoking under the same conditions as in Example 1 above, and then the same reaction conditions were evaluated to obtain time evaluation times of 58, 64, 65, and 68 hours, respectively.

Embodiment 3

[0065] The catalyst 100.0g prepared by patent CN102218338A embodiment 5 is the reformed oil whose bromine index is 950mgBr / 100g, in 8h -1 , Under 1.9MPa, the reaction was evaluated at a temperature of 170°C, and different evaluation times were evaluated when the bromine index at the outlet reached 150mg / 100g. The evaluation times were 80, 100, 130, and 180 hours to obtain different catalysts. Each catalyst after the evaluation is passed through petroleum ether at normal temperature, at a space velocity of 1h -1 , Decoking under the pressure 1.0MPa, the circulation rate was 50% at the beginning, and the circulation rate was 90% after 20 hours, and was 100% after another 2 hours, and stopped petroleum ether in 1 hour (the coke content difference of the material entering and leaving the reactor was 0.1%), then feed nitrogen, and stop nitrogen after feeding at normal temperature for 10 hours. Each revived catalyst in 8h -1 , 1.9MPa, under the reformed oil whose bromine index is ...

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Abstract

The invention discloses an activity control method of an in-situ decoking material of an aromatic hydrocarbon deolefination catalyst and application thereof. The method comprises the step of contacting a soluble coke material with a catalyst subjected to an aromatic hydrocarbon olefin removal refining reaction, wherein the bubble point of the soluble coke material in a standard state is below 90 DEG C, and the soluble coke material is one or a mixture of aliphatic hydrocarbon and an oxygen-containing organic compound. The invention mainly solves the problems of long regeneration period, large activity loss, short total service life and large catalyst hazardous waste amount caused by out-of-device regeneration required by the existing olefin removal catalyst. The method provided by the invention has the characteristics of simple regeneration, low cost, excellent reactivation restorability and multiple reactivation, and can be used for industrial application.

Description

technical field [0001] The invention relates to the field of aromatic hydrocarbon production, in particular to a method for controlling the activity of an aromatic hydrocarbon deolefin catalyst for in-situ decoking and its application. Background technique [0002] Aromatics from reforming or other reactions generally contain a small amount of olefins, which must be removed: first, the presence of olefins will lead to a decline in the quality of aromatic products, such as affecting color, purity, stability, etc.; second, olefins will reduce adsorption The service efficiency and life of the adsorbent or catalyst of the separation unit, disproportionation unit and other devices. Industrially, hydrogenation reaction and liquid-phase alkylation reaction are used to remove olefins from reformed aromatics. [0003] The equipment of the hydrogenation process has large investment, complex transformation, high operating costs, large loss of aromatics, and expensive catalysts. It is ...

Claims

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Application Information

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IPC IPC(8): B01J29/90B01J38/56B01J38/02B01J38/04B01J38/06C10G45/34
CPCB01J29/90B01J38/56B01J38/02B01J38/04B01J38/06C10G45/34C10G2400/30Y02P20/584
Inventor 孔德金郑均林李为周亚新吴历斌
Owner CHINA PETROLEUM & CHEM CORP
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