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Application of sulfo group mesoporous organic silicon catalyst

A sulfonic acid-based mesoporous, solid acid catalyst technology, used in organic chemistry, isomerization hydrocarbon production, etc., can solve the problems of poor stability, easy deactivation, rapid deactivation, etc., to achieve catalyst stability, high activity and selectivity performance, improve stability

Inactive Publication Date: 2013-10-30
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As reported on SO 2- / ZrO 2 The representative solid superacid has attracted great attention, but its stability is poor and its deactivation is fast.
The catalyst of heteropolyacid type has lower acidity and is more likely to be deactivated in the reaction.

Method used

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  • Application of sulfo group mesoporous organic silicon catalyst
  • Application of sulfo group mesoporous organic silicon catalyst
  • Application of sulfo group mesoporous organic silicon catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1 prepares catalyst

[0017] Octadecyltrimethylammonium chloride (ODTMA, 7.91g) was dissolved in 3mol / L NaOH aqueous solution (224.0mL), and then 1,2-bis(triethoxysilyl)ethane ( BTEE, 11.0 g) and 3-mercaptopropyltriethoxysilane (MPTMS, 2.04 g). The resulting suspension was stirred at room temperature for 20 hours and then at 95° C. for 24 hours. Filtration yielded a white precipitate. The precipitate was washed with a solution of hydrochloric acid (36% HCl, 3.0 g) in ethanol (200 mL) at 70° C. for 12 hours to remove the surfactant. Then at room temperature, with 65% HNO 3 Process for 24 hours. The product is then washed with a large amount of hot water to remove HNO 3 , and finally dried to obtain the final product A: sulfoethyl-linked HMM, namely Et-HMM-SO 3 , labeled Catalyst A.

Embodiment 2

[0018] Embodiment 2 prepares catalyst

[0019] Octadecyltrimethylammonium chloride (ODTMA, 7.93g) was dissolved in 3mol / L NaOH aqueous solution (224.0mL), and then 1,2-di(tripropoxysilyl)ethane ( BTEE, 15.8 g) and 3-mercaptopropyltriethoxysilane (MPTMS, 2.04 g). Other is with embodiment 1, makes Pr-HMM-SO 3 , namely Catalyst B.

Embodiment 3

[0020] Embodiment 3 prepares catalyst

[0021] Octadecyltrimethylammonium chloride (ODTMA, 7.92g) was dissolved in 3mol / L NaOH aqueous solution (275.0mL), and then 1,4-bis(triethoxysilyl)benzene (BTEB , 7.92g) and 3-mercaptopropyltriethoxysilane (MPTMS, 1.27g). Next step is the same as embodiment 1, makes Ph-HMM-SO 3 , namely catalyst C.

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Abstract

The invention relates to an application of a normal paraffin isomerization catalyst. The normal paraffin isomerization catalyst is used for an isomerization reaction of C4-C8 normal paraffin. According to the application, a preparation method of the normal paraffin isomerization catalyst comprises the following steps of: dissolving 7.91 g of octadecyl trimethyl ammonium chloride into 224.0 mL of a NaOH water solution with the concentration of 3 mol / L, and then adding 11.0 g of bis(triethoxysilyl)ethane and 2.04 g of 3-thiopropyl triethoxy silane; stirring at room temperature for 20 hours, stirring at 95 DEG C for 24 hours, and filtering to obtain white sediments; washing the sediments at 70 DEG C for 12 hours by using 200 mL of an ethanol solution which contains 3.0 g of 36 percent by mass of hydrochloric acid to remove a surface active agent; treating at room temperature for 24 hours by using 65 percent by mass of HNO3 to obtain a product; and washing the product by using hot water to remove the HNO3, and drying to obtain the normal paraffin isomerization catalyst. The reaction is higher in activity and selectivity and stable in reactivity without environment pollution or equipment corrosion.

Description

technical field [0001] The invention relates to the application of a sulfonic acid-based mesoporous organosilicon catalyst in the isomerization reaction of normal alkanes (C4-C8). Background technique [0002] Since the 1980s, due to the requirements of environmental protection, the quality of gasoline has developed in the direction of lead-free, low aromatics, low vapor pressure, high octane number and high oxygen content, so that the catalytic isomerization production process of C5 / C6 alkanes has been developed rapidly. [0003] The isomerization of C5 / C6 alkanes can obtain high-octane components without increasing the content of aromatics. It is an environmentally friendly processing technology to improve the composition and quality of gasoline. At present, the C5 / C6 alkane isomerization process is widely used in the world to produce high-octane gasoline components, and there will be a fairly rapid development in the next period. [0004] Due to the restriction of thermo...

Claims

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Application Information

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IPC IPC(8): C07C9/18C07C5/27
Inventor 罗琛田志坚潘晖华王磊阎立军曲炜胡胜马怀军李鹏
Owner PETROCHINA CO LTD
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