Molecular sieve based catalyst and preparation method thereof as well as application to side chain alkylation reaction of methyl alcohol and methylbenzene

A catalyst and molecular sieve technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low catalyst life, low selectivity to styrene, etc., achieve simple preparation process and improve technical economy. and promotion possibilities, the effect of high methanol conversion

Active Publication Date: 2019-03-12
NEIJIANG NORMAL UNIV
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the molecular sieve catalysts in the prior art for methanol and toluene side chain alkylation reactions such as low selectivity to styrene a

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Molecular sieve based catalyst and preparation method thereof as well as application to side chain alkylation reaction of methyl alcohol and methylbenzene

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] According to an exemplary embodiment of the present invention, the preparation method of the molecular sieve catalyst includes the following steps.

[0026] Step A:

[0027] adding water source to the silicon source for dilution, then adding template agent, aluminum source and sodium source successively and stirring evenly after each addition to obtain a liquid mixture;

[0028] In this step, SiO 2 Calculated, the quality of the silicon source is 100%, and the silicon source can be one or more of sodium silicate, silica sol, methyl orthosilicate and ethyl orthosilicate. Take Al 2 o 3 Calculated, the mass of the aluminum source is SiO in the silicon source 2 56.56-84.84% of the mass, and the aluminum source can be one or more of aluminum isopropoxide, sodium metaaluminate and aluminum nitrate. Take Na 2 In terms of O, the mass of the sodium source is SiO in the silicon source 2 1 to 3 times the mass, and the sodium source can be one or a mixture of sodium hydroxid...

Embodiment 1

[0050] The raw material components of the molecular sieve catalyst of the present embodiment are (the unit is mass, if there is no special instruction, the following are all equivalent):

[0051] SiO 2 In total, weigh 100 parts of silica sol; 2 o 3 In total, 56.56 parts of aluminum isopropoxide, as Na 2 In terms of O, 200 parts of sodium hydroxide; in terms of H 2 In terms of O, 1200 parts of deionized water; 40 parts of template agent ethylenediamine, 1 part of trimethylsilyl chloride, alkali metal ion exchange solution is 0.5mol / L of KNO 3 solution.

[0052] The molecular sieve catalyst of the present embodiment is prepared by the following method from the above-mentioned component raw materials:

[0053] A) According to the above component ratio, add deionized water to the silica sol to dissolve and dilute, then add ethylenediamine, dissolve and stir evenly, then add aluminum isopropoxide dropwise, and finally add sodium hydroxide dropwise;

[0054] B) Stir the obtain...

Embodiment 2

[0060] The raw material components of the molecular sieve catalyst of the present embodiment are:

[0061] SiO 2 In total, weigh 100 parts of ethyl orthosilicate; 2 o 3 In total, 56.56 parts of aluminum isopropoxide; 2 In terms of O, 100 parts of sodium hydroxide; in terms of H 2 O meter, deionized water is 1600 parts; template agent butanediamine 40 parts, dimethyldimethoxysilane 20 parts, alkali metal ion exchange solution is 2mol / L CsNO 3 solution.

[0062] The molecular sieve catalyst of the present embodiment is prepared by the following method from the above-mentioned component raw materials:

[0063] A) According to the above component ratio, add deionized water to tetraethyl orthosilicate to dissolve and dilute, then add butanediamine, dissolve and stir evenly, then add aluminum isopropoxide dropwise, and finally add sodium hydroxide dropwise;

[0064] B) Stir the obtained liquid mixture evenly, age at room temperature for 6 hours, add dimethyldimethoxysilane and...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Granularityaaaaaaaaaa
Login to view more

Abstract

The invention discloses a molecular sieve based catalyst and a preparation method thereof as well as application to the side chain alkylation reaction of methyl alcohol and methylbenzene. The preparation method specifically comprises the steps that a water source is added into a silicon source to dilute, then a template agent, an aluminum source and a sodium source are added sequentially and stirred uniformly after each adding is completed, and a liquid mixture is obtained; a silylating reagent is added after the liquid mixture is subjected to ageing at the room temperature and stirred uniformly, a crystallization reaction is conducted under the moderate and continuous stirring conditions after the materials are stirred uniformly, the product is washed and filtered after the reaction is ended, the obtained solid is dried and calcinated, and a molecular sieve based catalyst precursor is obtained; and the molecular sieve based catalyst precursor is placed into an alkali metal salt solution to be subjected to alkali metal ion exchanging, the obtained exchanged sample is filtered, dried and calcinated, and the molecular sieve based catalyst is obtained. The molecular sieve based catalyst is specifically applied to preparing styrene in the side chain alkylation reaction of methyl alcohol and methylbenzene. The physical and chemical features of the molecular sieve based catalyst arechanged by optimizing the preparation conditions of the molecular sieve, and the methyl alcohol conversion rate, and the selectivity and yield of styrene are finally and effectively improved.

Description

technical field [0001] The invention relates to the technical field of molecular sieve catalyst preparation and modification, and more specifically, relates to a molecular sieve catalyst, a preparation method thereof, and an application in side-chain alkylation reactions of methanol and toluene. Background technique [0002] In the contemporary chemical industry, styrene, as an important raw material for organic synthesis, is widely used in the production of polystyrene, styrene-butadiene rubber, ion exchange resins, medicines and dyes, etc. The output of its series of chemical materials is second only to that of the world's high-yield polymers. The output ranks in the forefront of the synthetic resin production in the world. The traditional styrene production process mostly uses benzene and ethylene to produce ethylbenzene, and then catalyzes dehydrogenation to produce styrene products. This process has long routes, high catalyst bed temperature (600°C-660°C), high energy c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01J29/08C07C15/073C07C2/86C07C15/46
CPCB01J29/082C07C2/864C07C15/46C07C15/073
Inventor 谭亚南阮尚全吴远彬
Owner NEIJIANG NORMAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap