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Regeneration method for coked iridium-containing catalyst

A catalyst and catalyst bed technology, applied in chemical instruments and methods, physical/chemical process catalysts, bulk chemical production, etc., can solve the problems of commercialization restrictions, difficult redispersion, low space velocity, etc., to reduce operating harshness The effect of speed, simplification of operation steps and recovery of reaction performance

Active Publication Date: 2013-07-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the main methods for lightening heavy aromatics are pyrolysis and catalytic dealkylation. US5001296, US5990031, CN1048425C, CN1082539C, CN1472181A, CN1472182A, and CN200580009162 disclose a series of catalysts and processes for lightening heavy aromatics. The main disadvantages of these technologies are that the reaction temperature and pressure are high, and the space velocity is low, which limits the commercialization of the technology.
[0004] CN200610112737 discloses an Ir-containing monometallic catalyst for lightening the heavy components in the reformed oil and increasing the production of BTX. The catalyst has excellent C 9 + Lightening performance of heavy aromatics, but the regeneration of Ir-containing metal catalysts is relatively difficult, and the activity and selectivity of the catalyst decrease significantly after regeneration
[0005] The regeneration of Ir-containing catalysts has not been effectively solved due to the fact that Ir components are easy to aggregate and its redispersion is difficult.
People such as Huang [J.Catal.131,378-384 (1991)] have studied the regeneration problem that contains Ir catalyst, find that the redispersion of Ir catalyst has certain relation with the chlorine content of catalyst, but how to realize Ir component Efficient redistributing does not propose a specific method

Method used

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  • Regeneration method for coked iridium-containing catalyst
  • Regeneration method for coked iridium-containing catalyst
  • Regeneration method for coked iridium-containing catalyst

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0028] Preparation of iridium-containing catalysts.

[0029] Get 100 grams of γ-alumina carriers, use the mixed solution prepared by chloroiridic acid and hydrochloric acid as the impregnating solution and impregnate at 25° C. for 8 hours. The aluminum carrier is used as a benchmark for calculation, the same below), and deionized water is added to make the liquid / solid volume ratio 1.2. After impregnation, dry the solid at 120°C for 12 hours, treat it for 4 hours at 510°C, air / agent volume ratio 1200 / 1, and water / chlorine molecular ratio 40 / 1, then dry it at 500°C, air / agent Under the condition of volume ratio of 500 / 1, it was reduced with hydrogen for 4 hours to obtain catalyst A, whose active component content is shown in Table 1.

example 2

[0031] Catalyst B was prepared according to the method of Example 1, except that the impregnating solution used contained 0.6% by mass of Ir, and the active component content of catalyst B was shown in Table 1.

example 3

[0033] Catalyst C was prepared according to the method of Example 1, except that tin tetrachloride was added in the impregnating solution, so that the impregnating solution contained 0.03 mass % of Sn and 0.3 mass % of Ir. The active component content of the obtained catalyst C was shown in Table 1.

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Abstract

The invention relates to a regeneration method for a coked iridium-containing catalyst. The regeneration method comprises the following steps of (1) two-stage scorching the coked iridium-containing catalyst with an oxygen-containing gas; and (2) performing water and chlorine balance treatment on the scorched catalyst, then performing water and chlorine activating treatment and the reducing. The method is simple in operations, and can completely recover performance of the coked catalyst.

Description

technical field [0001] The invention relates to a method for regenerating a carbon-deposited catalyst, in particular to a method for regenerating a carbon-deposited iridium-containing catalyst. Background technique [0002] Heavy aromatics generally refer to catalytic reforming, disproportionation and isomerization reactions to generate oil and C contained in ethylene cracking hydrogenated gasoline 9 -C 16 mono- and bicycloalkylaromatics. For a long time, heavy aromatic resources have not been rationally and fully utilized, except for a small amount used as solvent and extraction of C 9 、C 10 Except for monomeric aromatics, they are generally directly blended into gasoline pools as fuel. However, it is not advisable to directly use heavy aromatics as fuels from both economic and environmental point of view. On the one hand, heavy aromatics can be converted into light aromatics such as BTX; on the other hand, from the perspective of environmental protection, it has been ...

Claims

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Application Information

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IPC IPC(8): B01J27/32B01J27/13B01J27/135C07C15/04C07C15/06C07C15/08C07C4/06
CPCY02P20/52Y02P20/584
Inventor 蔡迎春马爱增潘锦程
Owner CHINA PETROLEUM & CHEM CORP
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