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Catalyst for aromatization of waste edible oil and production method and application of catalyst for aromatization of waste edible oil

A technology for waste edible oil and catalyst, which is applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of low activity, selectivity and stability of aromatization catalysts, and achieve the goal of inhibiting carbon deposition, Prevent agglomeration, sintering and loss, and ensure the effect of activity

Inactive Publication Date: 2020-01-17
HUAIYIN TEACHERS COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: In order to solve the problems of low activity, selectivity and stability of aromatization catalysts in the prior art, the present invention provides a new catalyst for the efficient aromatization of waste cooking oil to prepare light aromatics and its preparation method , and the application of the catalyst in the aromatization reaction of waste cooking oil, which has good reactivity, selectivity and stability

Method used

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  • Catalyst for aromatization of waste edible oil and production method and application of catalyst for aromatization of waste edible oil
  • Catalyst for aromatization of waste edible oil and production method and application of catalyst for aromatization of waste edible oil
  • Catalyst for aromatization of waste edible oil and production method and application of catalyst for aromatization of waste edible oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: prepare hierarchical porous HZSM-5 catalyst (do not introduce active metal):

[0028] Dissolve 10g of ZSM-5 in 300mL of NaOH solution with a concentration of 0.30mol / L, stir and mix thoroughly, then place it in a water bath at 80°C for 2h, then cool the suspension to room temperature, filter and wash until neutral . Then, the washed molecular sieves were exchanged three times with 0.8 mol / L ammonium nitrate solution at 75°C for 12 hours each time. After the exchange, the obtained suspension was filtered and washed, and then the obtained solid sample was dried at 120°C for 10 hours, and then calcined at 550°C for 5 hours, and finally the solid powder was obtained as hierarchically porous HZSM-5.

Embodiment 2

[0029] Example 2: Preparation of Hierarchical Porous SnO 2 / HZSM-5 catalyst (only the impregnation method was used to introduce the active metal into the hierarchically porous HZSM-5, no ALD modification):

[0030] 1) Dissolve 10g of ZSM-5 in 300mL of NaOH solution with a concentration of 0.30mol / L, stir and mix thoroughly, then place in a water bath at 80°C for 2h, then cool the suspension to room temperature, filter and wash until neutral. Then, the washed molecular sieves were exchanged three times with 0.8 mol / L ammonium nitrate solution at 75°C for 12 hours each time. After the exchange, the obtained suspension was filtered and washed, and then the obtained solid sample was dried at 120° C. for 10 h, and then calcined at 550° C. for 5 h to finally obtain a solid powder.

[0031] 2) Add the solid powder obtained in step 1) to SnCl 4 In the aqueous solution, a suspended material is formed, which is impregnated for 16 hours under stirring conditions. After the impregnatio...

Embodiment 3

[0032] Example 3: Preparation of Hierarchical Porous HZSM-5@ZnO@SiO 2 Catalyst (active metal introduced into hierarchically porous HZSM-5 using atomic layer deposition only, not modified by impregnation):

[0033] 1) Same as embodiment 2 step 1).

[0034] 2) The hierarchically porous HZSM-5 obtained in step 1) is placed in the flow chamber of the ALD reaction, and the metal source is deposited on the hierarchically porous HZSM-5 by atomic layer deposition. The metal source used is diethyl zinc, The deposition temperature was 180°C, and the number of deposition cycles was 30 to obtain the HZSM-5@ZnO catalyst.

[0035] 3) The HZSM-5@ZnO catalyst obtained in step 2) is placed in the flow chamber of the ALD reaction, and the SiO 2 The film is deposited on the pores and acidic sites on the outer surface of HZSM-5, the deposition temperature is 180°C, and the number of deposition cycles is 30. The deposited sample is fired at 550°C for 5 hours to obtain HZSM-5@ZnO@SiO 2 catalyst....

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Abstract

The invention discloses a production method of a catalyst used for producing light aromatic hydrocarbons through efficient aromatization of waste edible oil. The production method comprises firstly, conducting compound treatment on a carrier ZSM-5 by means of one or more of an acid, an alkali and water vapor to obtain hierarchical porous HZSM-5, then loading an aromatization active metal oxide onto the hierarchical porous HZSM-5 through a dipping method to obtain M / HZSM-5, then covering the interiors and the exteriors of pore channels of the HZSM-5 with metal oxide films, with aromatization catalysis activity, layer by layer by means of an atomic layer deposition method, and then introducing SiO2 films through the atomic layer deposition method to conduct selective passivating treatment onnon-shape-selective acidic sites on pore openings and the outer surface of M / HZSM-5@N. The catalyst produced through the production method of the catalyst used for producing the light aromatic hydrocarbons through efficient aromatization of the waste edible oil effectively improves the reaction activity, the selectivity and the stability of production of the light aromatic hydrocarbons through aromatization of the waste edible oil.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a catalyst for preparing light aromatic hydrocarbons through high-efficiency aromatization of waste cooking oil, a preparation method and application thereof. Background technique [0002] Aromatics mainly include benzene, toluene, and xylene, which are basic organic chemical raw materials and are widely used in synthetic fibers, synthetic resins, synthetic rubbers, and various fine chemicals. Aromatics are mainly derived from catalytic cracking and catalytic reforming reactions of crude oil. In recent years, due to the continuous consumption of crude oil reserves and the increasingly tight supply of fossil resources, the use of new energy sources instead of crude oil as raw materials for the production of chemicals has attracted widespread attention. [0003] According to statistics, the output of waste cooking oil in my country is as high as 5 million tons per ye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/40B01J29/44B01J29/46B01J35/10C07C2/86C07C1/207C07C15/04C07C15/06C07C15/08
CPCB01J29/405B01J29/44B01J29/46C07C1/207C07C2/86B01J35/60C07C15/04C07C15/06C07C15/08Y02P20/52
Inventor 王飞褚效中赵宜江赵朴素朱凤霞吴飞跃李乔琦李尚琳蒋云蒙周舟刘坛坛陈薇
Owner HUAIYIN TEACHERS COLLEGE
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