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Synthesis method of 1,3-butadiene and preparation method of catalyst

A synthesis method and catalyst technology, applied in the field of 1,3-butadiene synthesis, can solve the problems of low specific surface area of ​​oxides, difficulty in industrial scale-up, and lack of shape selectivity, etc., and achieve simple preparation process, easy industrialization, good stability effect

Active Publication Date: 2019-06-18
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

[0006] The above-mentioned catalysts all have certain disadvantages: the specific surface area of ​​the oxide is low and there is no shape selectivity, the conversion rate of ethanol and the selectivity of butadiene are low; BEA and MWW zeolites have certain shape selectivity, but the catalyst preparation process is complicated, Dealumination (BEA zeolite) or deboronation (MWW zeolite) treatment is required, it is not easy for industrial scale-up, and it does not have the economics of industrial application, and aluminum or boron cannot be completely removed, and it still has a certain promotion effect on the side reaction of ethanol dehydration

Method used

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  • Synthesis method of 1,3-butadiene and preparation method of catalyst
  • Synthesis method of 1,3-butadiene and preparation method of catalyst
  • Synthesis method of 1,3-butadiene and preparation method of catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0024] 1. Preparation of catalyst

[0025] (1) According to the consumption of 3wt%Zn-10wt%Y-MFI, Zn(NO 3 ) 2 6H 2 O and Y (NO 3 ) 3 6H 2 O was dissolved in 30mL of water, the concentration of zinc nitrate in the solution was 0.3wt%, under stirring conditions, ethyl orthosilicate was added dropwise in the above solution, the molar concentration of silicon in the solution was 1.6mol / L, and stirred for 3h, Then add 25wt% tetrapropylammonium hydroxide aqueous solution dropwise, the addition amount is 1.6mol, stir 12h;

[0026] (2) Put the obtained gel into a stainless steel hydrothermal kettle and crystallize at 160°C for 3 days;

[0027] (3) The obtained white powder was centrifuged, dried at 150°C for 12h, and calcined at 600°C for 5h to obtain a 3wt%Zn-10wt%Y-MFI catalyst, abbreviated as 3Zn-10Y-MFI.

[0028] 2. Molecular sieve catalyst catalyzes the conversion of ethanol to butadiene

[0029] The resulting 1g 3Zn-10Y-MFI catalyst was loaded into a φ6 stainless steel...

Embodiment 2

[0035] The difference between Example 2 and Example 1 is that the prepared catalyst is a 3wt%Zn-10wt%Zr-MFI catalyst, abbreviated as 3Zn-10Zr-MFI, and other reaction conditions are the same as in Example 1. The specific experimental results are shown in Table 1.

Embodiment 3

[0037] The difference between Example 3 and Example 1 is that the prepared catalyst is a 3wt%Zn-10wt%Hf-MFI catalyst, abbreviated as 3Zn-10Hf-MFI, and other reaction conditions are the same as in Example 1. The specific experimental results are shown in Table 1.

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Abstract

The invention relates to a method for preparing 1,3-butadiene, and a catalyst is a transition metal-containing MFI type molecular sieve. A raw material ethanol is in contact with the catalyst in a fixed bed manner, and is converted into butadiene in one step, wherein the reaction temperature is 250 to 550 DEG C. One of transition metal components X is one or more of transition metals Zn, Ni, Fe, Cu, Ag and Au, and the other component Y is one or more of acidic or basic metals Mg, Zr, Y, Hf, La, Ce, Sn and In. The catalyst according to the invention has the advantages of simple preparation process, low cost and easy availability. The method achieves the purpose of preparing butadiene from ethanol at high conversion and high selectivity and has an obvious industrial application value for theprocess of preparing butadiene from ethanol.

Description

technical field [0001] The invention relates to a synthesis method of 1,3-butadiene and the preparation of a catalyst thereof. Specifically, ethanol is used as a raw material and zeolite molecular sieve materials are used as a catalyst, and 1,3-butadiene is obtained through one-step reaction. Background technique [0002] 1,3-Butadiene is one of the most widely used organic chemical raw materials and is widely used in industry, especially in the synthetic rubber industry. It is mainly used in the production of butadiene rubber, styrene-butadiene rubber, nitrile rubber, styrene-butadiene polymer latex, styrene thermoplastic elastomer and acrylonitrile-styrene resin. In addition, it can also be used to prepare organic chemical products such as adiponitrile, hexamethylenediamine, nylon 66, and 1,4-butanediol. [0003] At present, there are two main sources of butadiene in the world. One is obtained from the dehydrogenation of the C4 fraction of the refinery. This method is cu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/40B01J29/46C07C1/24C07C11/167
Inventor 郑明远王婵张涛
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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