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Method for preparing alkane isomerization catalyst

A technology of alkane isomerization and catalyst, which is applied in the field of catalyst preparation, can solve the problems of reducing the yield of diesel oil, achieve the effects of suppressing side reactions and high resistance to sulfide poisoning

Pending Publication Date: 2018-11-06
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, under normal circumstances, when this type of acidic zeolite carries out the alkane conversion reaction at a higher temperature, it is easy to over-crack and produce low-carbon alkanes, which reduces the yield of diesel oil [K Na, J Yoon, GA Somorjai, Catal. Today , 2016, 265(24), 225-230.]

Method used

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  • Method for preparing alkane isomerization catalyst
  • Method for preparing alkane isomerization catalyst
  • Method for preparing alkane isomerization catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Take 0.46mmol trimethoxymercaptopropylsilane and 86mmol NaOH, add them to 7.25mL deionized water, and stir at room temperature for 12h. Add 0.038mmol H 2 PtCl 6 ·6H 2 O, stirred at room temperature for 0.5h. Then add 10mmol SiO 2 , stirred at 80°C for 0.5h, and cooled to room temperature. Add 2.09mol / L NaAlO dropwise 2 Solution 7.25mL, continue to stir for 4h.

[0034] The obtained material was put into a stainless steel reaction kettle lined with polytetrafluoroethylene, and subjected to constant temperature and dynamic hydrothermal crystallization reaction at 100° C. for 12 hours. The solid obtained from the reaction was taken out, washed and dried to obtain a Pt@SOD catalytic material encapsulated with Pt nanoclusters.

[0035] figure 1 The XRD patterns of the as-prepared Pt@SOD catalytic materials are given. It can be seen from the figure that the prepared Pt@SOD catalytic material shows the characteristic diffraction peaks of SOD, and the crystallization ...

Embodiment 2

[0039] Take 0.23mmol trimethoxymercaptopropylsilane and 86mmol NaOH, add them to 7.25mL deionized water, and stir at room temperature for 12h. Add 0.019mmol Pd(NH 3 ) 4 Cl 2 , stirred at room temperature for 0.5h. Then add 10mmol SiO 2 , stirred at 80°C for 0.5h, and cooled to room temperature. Add 2.09mol / L NaAlO dropwise 2 Solution 7.25mL, continue to stir for 4h.

[0040] The obtained material was put into a stainless steel reaction kettle lined with polytetrafluoroethylene, and subjected to constant temperature and dynamic hydrothermal crystallization reaction at 100° C. for 12 hours. The solid obtained from the reaction was taken out, washed and dried to obtain a Pd@SOD catalyst encapsulated with Pd nanoclusters.

[0041] Take 0.2g of Pd@SOD catalyst, mix it mechanically with 0.2g of HBeta zeolite, pulverize it, press it into tablets, then crush it, and sieve to get 40-60 mesh particles, put them in a continuous flow fixed-bed reaction device, in 50mL / min of H 2 T...

Embodiment 3

[0043] Take 0.46mmol trimethoxymercaptopropylsilane and 86mmol NaOH, add them to 7.25mL deionized water, and stir at room temperature for 12h. Add 0.038mmol H 2 IrCl 6 , stirred at room temperature for 0.5h. Then add 10mmol SiO 2 , stirred at 80°C for 0.5h, and cooled to room temperature. Add 2.09mol / L NaAlO dropwise 2 Solution 7.25mL, continue to stir for 4h.

[0044] The obtained material was put into a stainless steel reaction kettle lined with polytetrafluoroethylene, and subjected to constant temperature and dynamic hydrothermal crystallization reaction at 100° C. for 12 hours. The solid obtained from the reaction was taken out, washed and dried to obtain an Ir@SOD catalyst encapsulated with Ir nanoclusters.

[0045] Take 0.2g of Ir@SOD catalyst, mix it mechanically with 0.2g of HZSM-5 zeolite, pulverize it, press it into tablets, then crush it, sieve and take 40-60 mesh particles, put them in a continuous-flow fixed-bed reaction device, at 50mL / min H 2 The temper...

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Abstract

The invention discloses a method for preparing an alkane isomerization catalyst. The method comprises the following steps: adding a precious metal salt, silica and sodium aluminate solution into a sodium hydroxide aqueous solution of a template agent thiol silane, and carrying out a hydrothermal crystallization reaction to obtain a sodalite catalytic material encapsulated with precious metal clusters; mixing the catalytic material and acidic zeolite, and performing high-temperature activation, thereby obtaining the alkane isomerization catalyst. The catalyst prepared by the method disclosed bythe invention has high catalytic activity and selectivity and also has high sulfur resistance, the selectivity of the isomerization product is obviously increased in the alkane isomerization reaction, and the reactants can be inhibited from being excessively cracked into low carbon chain products.

Description

technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a preparation method of a catalyst used for alkane isomerization reaction which is composed of packaged noble metal components and acid carrier. Background technique [0002] Crude oil becomes heavier and worse, and the content of polycyclic aromatic hydrocarbons in diesel oil obtained by catalytic cracking is getting higher and higher. The existence of a large number of fused aromatic hydrocarbons makes diesel oil produce a lot of black smoke when it is burned, which affects the environment. Reducing the cetane number of diesel oil can not meet the requirements of environmental protection and automobile industry on indicators such as aromatics content and cetane number in diesel oil. Therefore, improving and upgrading the quality of catalytic cracking diesel oil is an important issue faced by oil processing countries in the world. [0003] Alkane isomerization can not only...

Claims

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Application Information

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IPC IPC(8): B01J29/12B01J29/44B01J29/74C10G45/64
CPCB01J29/126B01J29/44B01J29/7415C10G45/64
Inventor 范彬彬王红燕路宁悦李瑞丰
Owner TAIYUAN UNIV OF TECH
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