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Catalyst for reaction for preparing 1,3-butadiene from ethanol, preparation and applications thereof

A catalyst and butadiene technology, applied in the direction of catalysts, molecular sieve catalysts, carbon compound catalysts, etc., can solve the problem of less impact, and achieve the effects of favorable utilization, excellent reaction performance, and inhibition of side reactions

Active Publication Date: 2020-06-02
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In summary, molecular sieve catalysts have good application prospects in the reaction of ethanol to butadiene. The introduction of mesopores into the microporous structure of molecular sieves may greatly improve the activity and stability of catalysts. The effect of structure on the reaction of ethanol to butadiene is very little reported

Method used

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  • Catalyst for reaction for preparing 1,3-butadiene from ethanol, preparation and applications thereof
  • Catalyst for reaction for preparing 1,3-butadiene from ethanol, preparation and applications thereof
  • Catalyst for reaction for preparing 1,3-butadiene from ethanol, preparation and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] One, the preparation of 1Na-3Zn-10Hf-MFI catalyst

[0028] (1) In the mixed solution of ethyl orthosilicate and water, add 25wt% tetrabutylammonium hydroxide aqueous solution dropwise, stir for 12h to obtain a molar composition of 1.0 ethyl orthosilicate: 3.0 tetrabutylammonium hydroxide: 10-100 water the gel;

[0029] (2) Put the obtained gel into a stainless steel hydrothermal kettle and crystallize at 100°C for 6 days;

[0030](3) The obtained white powder was centrifuged, dried at 80° C. for 12 hours, and calcined at 600° C. for 5 hours to obtain an MFI molecular sieve with a nanosheet structure.

[0031] (4) Na 2 CO 3 , Zn(NO 3 ) 2 6H 2 O and HfCl 4 Dissolved in water, impregnated with the above-mentioned nanosheet MFI molecular sieve in equal volume, and dried in an oven at 80°C.

[0032] (5) Calcining the sample in step 4 at 550° C. for 4 hours to obtain the nanosheet molecular sieve catalyst 1Na-3Zn-10Hf-MFI.

[0033] The scanning electron microscope a...

Embodiment 2

[0041] The difference between Example 2 and Example 1 is that the prepared catalyst is a microporous molecular sieve catalyst 1Na-3Zn-10Hf-MFI, and other reaction conditions are the same as in Example 1. The specific experimental results are shown in Table 1.

[0042] The preparation method of microporous molecular sieve catalyst 1Na-3Zn-10Hf-MFI is as follows: HfCl 4 Dissolve in water, under stirring condition, add ethyl orthosilicate dropwise to the above solution, stir for 3h, then add 25wt% tetrapropylammonium hydroxide aqueous solution dropwise, stir for 12h; put the obtained gel into In a stainless steel hydrothermal kettle, crystallize at 160°C for 3 days; centrifuge the obtained white powder, dry, and roast at 600°C for 4 hours to obtain an MFI molecular sieve containing Hf; 2 CO 3 , Zn(NO 3 ) 2 6H 2 O was dissolved in water, impregnated with the above Hf-containing MFI molecular sieve in equal volume, dried, and calcined at 550° C. for 4 hours to obtain the micr...

Embodiment 3

[0047] The difference between Example 3 and Example 1 is that the prepared catalyst is nanosheet molecular sieve catalyst 1Li-3Zn-10Y-MFI, and other reaction conditions are the same as Example 1. The specific experimental results are shown in Table 2.

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Abstract

The invention relates to a catalyst for a reaction for preparing 1,3-butadiene from ethanol, a preparation method and applications thereof. The catalyst is an MFI type molecular sieve, which has a nanosheet layer structure, contains two transition metals X and Y and an alkaline earth metal Z, and is formed by cross growth of nanosheet layers, wherein the thickness of the nanosheet layer is 2-50 nm, the metal component X of the catalyst is one or more than two selected from transition metal elements Zn, Ni, Fe, Cu and Ag, the component Y of the catalyst is one or more than two selected from acidic or alkaline metals Zr, Y, Hf, La, Ce, Sn and Ta, and the metal elements are loaded on a molecular sieve carrier in a post-treatment manner. The invention provides a catalyst for preparing 1,3-butadiene by stably and efficiently catalyzing ethanol conversion, a preparation method and applications thereof, wherein the catalyst has obvious industrial application value in a process for preparing butadiene from ethanol.

Description

technical field [0001] The invention relates to a catalyst for the reaction of ethanol to 1,3-butadiene, a preparation method and its application, in particular to an MFI type molecular sieve material catalyst with a nanosheet structure and containing various metals and its preparation, and The application of one-step preparation of 1,3-butadiene in the catalytic conversion of ethanol. Background technique [0002] 1,3-butadiene is an important polymer monomer, which can be copolymerized with various compounds to produce various synthetic rubbers and synthetic resins. 1,3-butadiene is mainly extracted from the mixed C4 fraction produced by the ethylene cracking unit. , it is of great significance to develop a new 1,3-butadiene production process route. It is a valuable research direction to replace petroleum resources with ethanol as raw materials for the production of some important organic chemical products. [0003] The key technology for the reaction of ethanol to 1,3...

Claims

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Application Information

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IPC IPC(8): C07C1/20B01J29/40B01J29/46C07C11/16
CPCC07C1/20B01J29/405B01J29/46B01J2229/18C07C2529/46C07C2529/40C07C11/16
Inventor 郑明远王婵张涛
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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