Catalyst and its preparation method and application and preparation method of 1,3-butadiene

A catalyst and solvent technology, which is applied in the field of catalyst and its preparation method and application, and the preparation of 1,3-butadiene, can solve the problems such as high requirement of raw material ethanol concentration, low catalyst selectivity, catalyst carbon deposition and deactivation, etc. , to achieve the effects of excellent catalytic performance, good hydrothermal stability, and strong carbon capacity.

Active Publication Date: 2021-11-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the point of view of the catalyst: 1) The selectivity of the catalyst is low, and the reaction product is complicated; 2) The reaction temperature is high, and the energy consumption is large; 3) The catalyst is easy to be deactivated by carbon deposition, and the concentration of raw material ethanol is required to be high

Method used

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  • Catalyst and its preparation method and application and preparation method of 1,3-butadiene
  • Catalyst and its preparation method and application and preparation method of 1,3-butadiene
  • Catalyst and its preparation method and application and preparation method of 1,3-butadiene

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preparation example Construction

[0033] According to the present invention, preferably, in order to further improve the catalytic activity and selectivity of the catalyst, the preparation method of the catalyst comprises: converting the molecular sieve with EWT structure into H-EWT molecular sieve, and preparing the H-EWT molecular sieve with skeleton vacancies , and the H-EWT molecular sieves with framework vacancies were dispersed in a solution containing metal oxide precursors, then the solvent was removed and calcined. By preparing the H-EWT molecular sieve with skeleton vacancies, highly dispersed metal oxides are connected to the molecular sieve skeleton, thereby further improving the catalytic activity and selectivity of the catalyst.

[0034] Wherein, the method for converting the molecular sieve with EWT structure into H-EWT molecular sieve can be carried out with reference to conventional methods in the art. For example: ammonium salt exchange and deamination roasting of molecular sieves (including ...

preparation example 1

[0062] Add 0.268g of sodium metaaluminate into a 45mL polytetrafluoroethylene container, and add 15.5g of an aqueous solution of template agent R (1,5-bis(N-propylpyrrolidinium)pentane dihydroxide) (of R content is 30% by mass), stirred for 30 minutes until uniform, then added 6g of solid silica gel (SiO 2 content is 98.05% by mass) and 17.5g deionized water, stirred for 5 minutes and fully mixed, wherein the molar ratio of each component is: SiO 2 / Al 2 o 3 =60,H 2 O / SiO 2 =10, Template R / SiO 2 =0.16, OH - / SiO 2 = 0.32.

[0063] The above mixture was put into a 45mL polytetrafluoroethylene-lined steel autoclave, covered and sealed, and the autoclave was placed in a rotating convection oven with the rotation speed set at 20rpm, and reacted at 150°C for 5 days. Take out the autoclave and let it cool down to room temperature quickly, separate the mixture on a 5000rpm high-speed centrifuge, collect the solid, wash it thoroughly with deionized water, and dry it at 100°C f...

preparation example 2

[0065] Prepare the original powder of EWT structural molecular sieve according to the method of Preparation Example 1. The difference is that the amount of sodium metaaluminate is 0.107g, and the types and amounts of other materials are the same as in Preparation Example 1, wherein the molar ratio of each component is: SiO 2 / Al 2 o 3 =120,H 2 O / SiO 2 =10, Template R / SiO 2 =0.16, OH - / SiO 2 = 0.32. Finally, the raw powder of molecular sieve with EWT structure is obtained. The scanning electron microscope image of the product is shown in image 3 As shown, the XRD pattern is as Figure 4 As shown, the silicon-aluminum ratio of the original powder sample obtained by X-ray fluorescence spectroscopic analysis is 98. The total specific surface of the molecular sieve with the EWT structure is S 总 =601m 2 / g, the total pore volume is V 总 =0.386cm 3 / g.

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Abstract

The invention relates to the field of catalysts, and discloses a catalyst, its preparation method and application, and a preparation method of 1,3-butadiene, wherein the catalyst contains molecular sieves with EWT structure and metal oxides. The preparation method of the 1,3-butadiene comprises: contacting ethanol and acetaldehyde in the presence of a catalyst, and the catalyst is the catalyst provided by the invention. The present invention first adopts the molecular sieve containing metal oxide and the topological structure of EWT structure as the active component of the catalyst, and exhibits excellent catalytic performance when it is applied to the reaction of preparing 1,3-butadiene from ethanol.

Description

technical field [0001] The present invention relates to a kind of catalyst and its preparation method and application and the preparation method of 1,3-butadiene, specifically, relate to a kind of catalyst containing EWT structural molecular sieve and its The preparation method and application, as well as the method for preparing 1,3-butadiene by using the catalyst containing the molecular sieve with EWT structure. Background technique [0002] Molecular sieves are widely used, and different uses often have special requirements on the pore structure of molecular sieves. Molecular sieve is one of the important catalytic materials, widely used in oil refining and chemical industry. Molecular sieves include four types of small pores, medium pores, large pores and super large pores: small pore molecular sieves have pore size, including CHA, LEV, SOD, LTA, ERI, KFI; mesoporous molecular sieves have pore size, including MFI, MEL, EUO, MWW, TON, MTT, MFS, AEL, AFO, HEU, FER; m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/78B01J35/10B01J37/02C07C1/207C07C11/167
CPCB01J29/78B01J35/1023B01J35/1038B01J37/0207B01J2229/18C07C1/2072C07C11/167
Inventor 王永睿李江成孙明毅陈俊文慕旭宏舒兴田
Owner CHINA PETROLEUM & CHEM CORP
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