Molecular sieve supported Cu-Cp Schiff base complex, and preparation method and application thereof

A molecular sieve and Schiff base technology, applied in the field of gasoline desulfurization, can solve the problems of poor industrial practicability, cumbersome synthesis steps, and complicated preparation processes

Active Publication Date: 2014-07-30
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Catalytic oxidation desulfurization method is to use catalyst to catalyze the oxidation-reduction reaction between oxidant and sulfide, and change its polarity to make it easy to remove the compound. A method of using balancer, titanium dioxide, powdery clay and granular clay as catalysts, and oxygen as oxidant to catalyze oxidative desulfurization. After the above-mentioned desulfurization catalyst is optimized, the desulfurization rate can reach 63.12%, and the granular desulfurization effect is the best. The recovery rate of white clay to gasoline is too low to be discussed
Another example is the Chinese patent CN102633842A, which discloses a preparation method and application of a bimetallic reactive center ionic liquid desulfurizer, which prepares a desulfurizer with a functional group -CH 2 Cl or -SO 2 The organoiron-cobalt metal Schiff base type complex of Cl, the disclosed catalysts are all ionic liquids with benzene ring macromolecular structure, the synthesis process requires more than 6 steps of reaction, the synthesis steps are cumbersome, the preparation process is complicated, and the industrial applicability is poor

Method used

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  • Molecular sieve supported Cu-Cp Schiff base complex, and preparation method and application thereof
  • Molecular sieve supported Cu-Cp Schiff base complex, and preparation method and application thereof
  • Molecular sieve supported Cu-Cp Schiff base complex, and preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0106](1) Preparation of Schiff base-type salen ligand: Weigh salicylaldehyde and ethylenediamine at a molar ratio of 2:1 under normal temperature and pressure, dissolve them in 20mL and 30mL ethanol respectively, and add the salicylaldehyde solution into a three-necked flask ethylenediamine solution was added dropwise thereto, stirred at 50°C for 2h, vacuum filtered after standing at room temperature, the filter cake was washed with ethanol, recrystallized twice with ethanol, and vacuum-dried at 60°C for 12h;

[0107] (2) Synthesis of (Cu-Co)Y bimetallic ion-exchange molecular sieves: Weigh 3.5 g of NaY molecular sieves activated at 500 °C for 4 h, 2 Under protection, add 0.05mol / L Cu(Ac) respectively 2 ·H 2 O with 0.05mol / L Co(Ac) 2 4H 2 In 100mL aqueous solution of O, reflux and stir at 90°C for 24h, filter and wash the filter cake with distilled water at about 60°C until it is colorless, and vacuum-dry at 110°C for 6h to obtain brown ion-exchanged molecular sieve (Cu-Co...

Embodiment 2

[0110] The method used in this embodiment is the same as that of Example 1, the difference is only that Cu(Ac) in step (2) 2 ·H 2 The concentration of O is 0.1mol / L and Co(Ac) 2 4H 2 The concentration of O is 0.1 mol / L.

Embodiment 3

[0112] The method used in this embodiment is the same as that of Example 1, the difference is only that Cu(Ac) in step (2) 2 ·H 2 The concentration of O is 0.03mol / L and Co(Ac) 2 4H 2 The concentration of O is 0.07mol / L.

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Abstract

The invention discloses a molecular sieve supported Cu-Cp Schiff base complex, and a preparation method and application thereof. A method of 'building a ship in a bottle' is employed for packaging a complex in molecular sieve, thus the complex is prevented from forming dimer, multimer or peroxides, and the catalytic oxidation activity of the complex is kept. The complex has high catalytic oxidation efficiency on sulfides in gasoline and is easy to recover and reuse, and gasoline subjected to sulfide degradation is high in recovery rate and high in reutilization rate. The preparation method is simple in operation and has industrial practicality.

Description

technical field [0001] The invention relates to the field of gasoline desulfurization, in particular to a catalyst for removing organic sulfur in FCC gasoline, its preparation method and application. Background technique [0002] SO 2 It is one of the main pollutants in the atmosphere. Its excessive presence in the air can lead to environmental problems such as acid rain. With the development of the automobile industry, the penetration rate of automobiles has increased year by year. As an indispensable source of power, gasoline has a huge annual consumption amount, the SO produced by the combustion of organic sulfides in gasoline 2 become SO in the atmosphere 2 One of the main sources of gasoline, and 80% to 90% of the sulfur in finished gasoline comes from FCC gasoline components, that is, catalytically cracked gasoline. Therefore, the key to reducing the sulfur content of finished gasoline is to reduce the sulfur content of FCC gasoline. [0003] Therefore, FCC gasoline...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26C10G53/14
Inventor 余江
Owner BEIJING UNIV OF CHEM TECH
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