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Catalyst for removing trace amounts of olefin hydrocarbon in arene

A catalyst, a technology for removing olefins, applied in molecular sieve catalysts, physical/chemical process catalysts, organic chemistry, etc., can solve the problems of ineffective removal, short operation period, unfavorable environment, etc.

Inactive Publication Date: 2009-05-20
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are currently 8 sets of aromatics extraction devices in China to refine the extracted aromatics with clay. The process of refining clay is simple and the production cost is low, but the deactivation of clay is very fast, the operation cycle is very short, and the clay after deactivation cannot be regenerated. , can only be disposed of by landfill, which is very harmful to the environment
[0011] Because the content of olefin impurities in aromatics is usually very small (less than 1%), general alkylation catalysts cannot effectively remove trace olefins in aromatics due to reasons such as selectivity and activity

Method used

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  • Catalyst for removing trace amounts of olefin hydrocarbon in arene
  • Catalyst for removing trace amounts of olefin hydrocarbon in arene
  • Catalyst for removing trace amounts of olefin hydrocarbon in arene

Examples

Experimental program
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preparation example Construction

[0034] The preparation method of deolefin catalyst of the present invention comprises the following steps:

[0035] (1) Mix alumina and molecular sieve powder evenly;

[0036] (2) Add lanthanide rare earth, P, W, Nb, M to the uniformly mixed powder in step (1) o The compound of at least one metal, then add acid, mix, or the compound of at least one element selected from lanthanide rare earth, P, W, Nb, Mo is dissolved in acid, and the solution is added to step (1) In the prepared mixture, mix;

[0037] (3) extruding the mixture obtained in step (2) into strips;

[0038] (4) Roasting the strips prepared in step (3) at 350-750° C. for 3-9 hours.

[0039] As a catalyst for removing trace olefins in aromatics, the present invention can be directly filled into the clay tower without rebuilding the device, which saves construction costs. In addition, the clay needs to be replaced in a short period of time. Compared with the clay catalyst, the catalyst of the present invention has...

preparation example 1

[0046] 60 g NH 4 Add 70 grams of Al to Y molecular sieve 2 o 3 , 23 grams La 2 o 3 ,well mixed;

[0047] Add 40ml of nitric acid dropwise to the mixture, mix well and extrude;

[0048] The above catalyst was calcined at 450°C for 9 hours, and the obtained solid catalyst was Catalyst 1.

preparation example 2

[0050] 70 g NH 4 Add 100 grams of Al to Y molecular sieve 2 o 3 , 30 g Ce 2(CO 3 ) 3 ,well mixed;

[0051] Add 50ml of nitric acid dropwise to the mixture, mix well and extrude;

[0052] The above catalyst was calcined at 400°C for 9 hours, and the obtained solid catalyst was Catalyst 2.

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Abstract

The invention discloses a catalyst removing trace olefin in aromatic hydrocarbon. The catalyst comprises the following compositions by weight percentage: 30 to 70 percent of Al2O3, 30 to 70 percent of molecular sieve, and 0 to 40 percent of one or a compound of La-based rare earth, P, W, Nb and Mo. The catalyst is an alkylate catalyst, and can maintain high catalytic activity for a long time.

Description

technical field [0001] The present invention relates to a catalyst for removing olefins, further relates to a catalyst for removing trace olefins in aromatic hydrocarbons, and also relates to a preparation method and application of the catalyst. Background technique [0002] Aromatics are an important basic raw material for the petrochemical industry. Among the total of about eight million known organic compounds, aromatics account for about 30%, among which BTX aromatics (benzene, toluene, xylene) are called primary basic organic compounds. Raw materials play an extremely important role in petroleum products. [0003] Triphenyl raw materials are now mainly derived from petroleum products. The production of triphenyl by petrochemical technology mainly includes processes such as naphtha reforming and steam cracking, which are all mature and effective, but there is a certain amount of olefin impurities (less than 1%) in the aromatic products of these processes, which not only...

Claims

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Application Information

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IPC IPC(8): B01J29/08B01J29/16C07C7/148C07C15/00
Inventor 施力于海江
Owner EAST CHINA UNIV OF SCI & TECH
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