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Preparation method and application of novel titanium silicalite molecular sieve

A titanium-silicon molecular sieve, a new type of technology, applied in molecular sieve catalysts, molecular sieves and alkali exchange compounds, organic chemical methods, etc., can solve the problems of weak catalytic activity, small mesoporous specific surface, low carbon dioxide conversion efficiency, etc., to improve catalytic performance. , strong adsorption performance, the effect of alleviating the shortage of petroleum resources

Inactive Publication Date: 2021-04-06
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For titanium-silicon molecular sieves, only titanium that enters the silicon-oxygen framework has catalytic activity. Most of the currently synthesized titanium-silicon molecular sieves exist in the form of free anatase, which has the disadvantages of mesopores and small specific surfaces, resulting in titanium Silicon molecular sieves have weak catalytic activity and low carbon dioxide conversion efficiency

Method used

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  • Preparation method and application of novel titanium silicalite molecular sieve
  • Preparation method and application of novel titanium silicalite molecular sieve
  • Preparation method and application of novel titanium silicalite molecular sieve

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Preferably, 5.28g of cetyltrimethylammonium bromide (CTABr) is weighed, dissolved in 325.7ml of deionized water, and ultrasonicated for 15 minutes at a temperature of 313K. Obtain a homogeneous clear solution, then add 167.2ml of 37% hydrochloric acid, and then slowly add a certain amount of tetrabutyl titanate (TBOT) solution dissolved in isopropanol to the above solution under strong mechanical stirring , and then cooled to 273k. After 30 minutes, under vigorous stirring, slowly add a certain amount of ethyl orthosilicate which was cooled to 273k in advance into the above solution dropwise, after 5 minutes, stop stirring, and crystallize under static conditions for 6 hours, and then The above solution was suction filtered and washed with acetone. Place the oven at 100°C, take it out to a mortar after 4 hours, grind it to a uniform powder, put it into a muffle furnace, heat up to 873K for 4 hours and calcinate for 4 hours to obtain the product Ti-SBA-1. The molar rat...

Embodiment 2

[0033] Preferably, (1) 5.28g of cetyltrimethylammonium bromide (CTABr) was weighed, dissolved in 325.7ml of deionized water, and ultrasonicated for 15 minutes at a temperature of 313K. Obtain a homogeneous clear solution, then add 167.2ml of 37% hydrochloric acid, and then slowly add a certain amount of tetrabutyl titanate (TBOT) solution dissolved in isopropanol to the above solution under strong mechanical stirring , and then cooled to 273k. After 30 minutes, under vigorous stirring, slowly add a certain amount of ethyl orthosilicate which was cooled to 273k in advance into the above solution dropwise, after 5 minutes, stop stirring, and crystallize under static conditions for 6 hours, and then The above solution was suction filtered and washed with acetone. Place the oven at 100°C, take it out to a mortar after 4 hours, grind it to a uniform powder, put it into a muffle furnace, heat up to 873K for 4 hours and calcinate for 4 hours to obtain the product Ti-SBA-1. The mola...

Embodiment 3

[0036] Preferably, (1) 5.28g of cetyltrimethylammonium bromide (CTABr) was weighed, dissolved in 325.7ml of deionized water, and ultrasonicated for 15 minutes at a temperature of 313K. Obtain a homogeneous clear solution, then add 167.2ml of 37% hydrochloric acid, and then slowly add a certain amount of tetrabutyl titanate (TBOT) solution dissolved in isopropanol to the above solution under strong mechanical stirring , and then cooled to 273k. After 30 minutes, under vigorous stirring, slowly add a certain amount of ethyl orthosilicate which was cooled to 273k in advance into the above solution dropwise, after 5 minutes, stop stirring, and crystallize under static conditions for 6 hours, and then The above solution was suction filtered and washed with acetone. Place the oven at 100°C, take it out to a mortar after 4 hours, grind it to a uniform powder, put it into a muffle furnace, heat up to 873K for 4 hours and calcinate for 4 hours to obtain the product Ti-SBA-1. The mola...

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Abstract

The invention belongs to the technical field of new energy materials, and particularly relates to a preparation method and an application of a novel titanium silicalite molecular sieve. The method comprises the following steps: carrying out a series of synthesis reactions on cetyl trimethyl ammonium bromide (CTABr), deionized water, hydrochloric acid, a tetrabutyl titanate (TBOT) solution dissolved in isopropanol, tetraethoxysilane and other components, carrying out suction filtration, washing, and calcining in a dryer to obtain Ti-SBA-1, and further enhancing the catalytic performance through metal element doping or organic functional group modification. The titanium silicalite molecular sieve with a three-dimensional cubic structure is directly synthesized under a strong acid condition, and the molecular sieve has the characteristics of mesopores and large specific surface area, so that the molecular sieve has relatively strong adsorption performance; the titanium silicalite molecular sieve prepared by the invention can successfully realize conversion from CO2 to methanol and ethanol through photoelectricity combined catalytic CO2 reduction reaction. Benzaldehyde and styrene oxide are successfully prepared by catalyzing an epoxidation reaction of styrene through a novel titanium silicalite molecular sieve, so that the pressure of shortage of petroleum resources can be relieved to a certain extent.

Description

technical field [0001] The invention belongs to the technical field of new energy materials, and in particular relates to a preparation method and application of a novel titanium-silicon molecular sieve. Background technique [0002] The rapid development of today's world economy has greatly improved productivity, but it has also brought many negative problems. A series of global crises such as environmental pollution, ecological destruction, and energy shortage have seriously restricted the development of us and our future generations. [0003] Both benzaldehyde and styrene oxide are industrially important intermediates of many important reactions, and have great industrial value, but the traditional industrial synthesis methods of these two products all consume crude oil, and the production steps are complicated and the conditions are not Very harsh, serious pollution to the environment. [0004] Only a small part of the energy radiated from the sun can reach the surface...

Claims

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Application Information

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IPC IPC(8): B01J29/89C01B39/04C01B39/08C07C29/15C07C45/28C07D301/03C07D303/04C07B33/00C07C31/04C07C31/08C07C47/54
CPCB01J29/89C01B39/085C01B39/04C07C29/15C07C45/28C07D303/04C07D301/03C07B33/00C01P2002/72C01P2004/03B01J2229/186C07C31/04C07C31/08C07C47/54Y02P20/52
Inventor 王冰肖琪琳景欢旺冯辉霞史亮刘亚飞夏浩天汪强强
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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