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Preparation method and application of titanium-modified hierarchical pore mordenite

A technology of mordenite and mordenite, which is applied in the preparation of titanium-modified multi-level porous mordenite and its application field, can solve the problems of low conversion capacity of thiophene sulfur-containing compounds and high catalyst cost, and achieve good catalytic activity, multiple Effect of reaction space and cost reduction

Inactive Publication Date: 2016-05-11
HARBIN INST OF TECH
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Problems solved by technology

[0004] The present invention aims to solve the technical problems of low conversion ability of existing oxidative desulfurization catalysts for macromolecular thiophene sulfur-containing compounds and the high cost of preparing catalysts, and provides a preparation method and application of titanium-modified hierarchically porous mordenite

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  • Preparation method and application of titanium-modified hierarchical pore mordenite
  • Preparation method and application of titanium-modified hierarchical pore mordenite
  • Preparation method and application of titanium-modified hierarchical pore mordenite

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specific Embodiment approach 1

[0027] Specific embodiment one: the preparation method of the titanium-modified hierarchically porous mordenite of the present embodiment is specifically carried out according to the following steps:

[0028]1. Mix 10-25g of silicon source, 1-3g of aluminum source, 3-5g of NaOH and 30-50mL of deionized water evenly, and then crystallize at a temperature of 150-200°C for 2-7 days to obtain sodium mordenite. Add ammonium nitrate aqueous solution, exchange 2 to 4 times, and each exchange time is 1.5 to 3 hours to obtain ammonium-type mordenite, and then calcinate at a temperature of 500-550 ° C for 2-6 hours to obtain hydrogen-form mordenite; wherein, The solid-to-liquid ratio of sodium mordenite and ammonium nitrate aqueous solution in the exchange process is 1g:(15~30)mL;

[0029] 2. Add the hydrogen mordenite obtained in step 1 to HNO 3 In the aqueous solution, reflux at a temperature of 90-110°C for 1.5-4 hours, wash with deionized water until the filtrate is neutral, then d...

specific Embodiment approach 2

[0033] Embodiment 2: This embodiment differs from Embodiment 1 in that: in step 1, the silicon source is silicic acid, tetraethyl orthosilicate or organosilane, and the aluminum source is sodium metaaluminate or alumina. The other specific embodiments are the same.

specific Embodiment approach 3

[0034] Embodiment 3: This embodiment differs from Embodiment 1 in that: the concentration of the ammonium nitrate aqueous solution in step 1 is 0.5-2 mol / L. The other specific embodiments are the same.

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Abstract

The invention relates to a preparation method of hierarchical porous mordenite modified by titanium and application of the hierarchical porous mordenite in oxidation desulfurization reaction, in particular to a preparation method and application of the hierarchical porous mordenite modified by titanium, and aims to solve the problems that the conventional oxidation desulfurization catalyst has low transfer ability for macromolecular thiophene sulfur-containing compounds and the cost for preparation of the catalyst is high. The preparation method comprises the following steps: I, preparing hydrogen mordenite; II, performing acid treatment on mordenite; III, preparing hydrogen hierarchical porous mordenite; IV, performing acid treatment on the hydrogen hierarchical porous mordenite; V, using titanium to modify the hydrogen hierarchical porous mordenite and preparing hierarchical porous mordenite modified by titanium. According to the preparation method and application of the hierarchical porous mordenite modified by titanium, a hierarchical porous mordenite molecular sieve is combined with titanium, so that an active centre and a reaction space are provided, the dibenzothiophene macromolecular reaction is allowed, the service life of the catalyst is prolonged. The hierarchical porous mordenite modified by titanium, prepared by adopting the preparation method can serve as an oxidation desulfurization catalyst to be applied to the oxidation desulfurization reaction.

Description

technical field [0001] The invention relates to a preparation method of titanium-modified multi-level porous mordenite and its application in oxidation desulfurization reaction. Background technique [0002] In recent years, the desulfurization technology of transportation fuel has become an increasingly popular research topic. Sulfur compounds are one of the main impurities in crude oil. Because of two reasons: First, the quality of crude oil has declined, and the proportion of heavy oil in recoverable and utilizable oil is getting higher and higher, and the sulfur content in heavy oil is higher. Second, the importance of global environmental pollution is increasing day by day, and the increasingly stringent regulations lead to the reduction of sulfur content in fuel oil. For example, in Europe, the sulfur content dropped from 2000ppm in 1999 to 500ppm in 2000. Today, the sulfur content standard in fuel oil is less than 10ppm. Sulfur compounds in liquid fuels can directl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/18B01J35/10C10G27/00
Inventor 孙印勇冷坤岳张幸
Owner HARBIN INST OF TECH
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