Application of bismuth molybdate catalyst with nanosheet structure in catalytic synthesis of 1,3-butadiene

A technology of nanosheets and catalysts, which is applied in the field of catalytic synthesis 1, bismuth molybdate catalysts, can solve problems that have not been studied before, and achieve the effects of excellent effect, good stability and simple process

Active Publication Date: 2019-07-05
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the reaction of butene oxidative dehydrogenation to butadiene, there has been no related research

Method used

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  • Application of bismuth molybdate catalyst with nanosheet structure in catalytic synthesis of 1,3-butadiene
  • Application of bismuth molybdate catalyst with nanosheet structure in catalytic synthesis of 1,3-butadiene
  • Application of bismuth molybdate catalyst with nanosheet structure in catalytic synthesis of 1,3-butadiene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Catalyst preparation process:

[0027] 1.2125g Bi(NO 3 ) 3 ·5H 2 O was dissolved in 40ml of deionized water, recorded as solution A, 0.2207g (NH 4 ) 6 Mo 7 o 24 4H 2 O was dissolved in 10ml of deionized water, which was recorded as solution B. Under the condition of magnetic stirring, the solutions of A and B were transferred to a 100ml vessel lined with polytetrafluoroethylene. After fully stirring, the pH of the mixed solution was adjusted with ammonia water to 5. Continue stirring for half an hour. The container was sealed and placed in an oven for hydrothermal reaction at a temperature of 180° C. for 18 hours. The reaction product was collected, centrifuged, washed and dried, then calcined in a muffle furnace at 500° C. for 4 hours, ground and sieved after cooling to obtain a bismuth molybdate nanosheet catalyst of 40-60 mesh.

[0028] Oxidative dehydrogenation reaction process:

[0029] 1 g of the above catalyst was filled into a stainless steel reactor w...

Embodiment 2

[0032] Catalyst preparation process:

[0033] 1.2125g Bi(NO 3 ) 3 ·5H 2 O was dissolved in 50ml of deionized water, recorded as solution A, 0.2207g (NH 4 ) 6 Mo 7 o 24 4H 2 Dissolve O in 10ml of deionized water and record it as solution B. Under magnetic stirring conditions, transfer A and B solutions to a 100ml container with a polytetrafluoroethylene liner. After fully stirring, adjust with 3mol / L NaOH solution. The pH of the mixture was 6, and stirring was continued for half an hour. After sealing the container, place it in an oven to carry out hydrothermal reaction, the hydrothermal reaction temperature is 180°C, and the time is 20h. The reaction product was collected, centrifuged, washed and dried, then calcined in a muffle furnace at 500° C. for 4 hours, ground and sieved after cooling to obtain a bismuth molybdate nanosheet catalyst of 40-60 mesh.

[0034] Oxidative dehydrogenation reaction process:

[0035] 1 g of the above catalyst was filled into a stainles...

Embodiment 3

[0038] Catalyst preparation process:

[0039] 1.2125g Bi(NO 3 ) 3 ·5H 2 O was dissolved in 55ml of deionized water, recorded as solution A, 0.2207g (NH 4 ) 6 Mo 7 o 24 4H 2O was dissolved in 5ml of deionized water, which was recorded as solution B. Under the condition of magnetic stirring, the solutions of A and B were transferred to a 100ml vessel lined with polytetrafluoroethylene. After fully stirring, the pH of the mixed solution was adjusted with ammonia water to 6. Continue stirring for half an hour. The container was sealed and placed in an oven for hydrothermal reaction at a temperature of 160° C. for 24 hours. The reaction product was collected, centrifuged, washed and dried, then calcined in a muffle furnace at 550° C. for 3 hours, ground and sieved after cooling to obtain a bismuth molybdate nanosheet catalyst of 40-60 mesh.

[0040] Oxidative dehydrogenation reaction process:

[0041] 1 g of the above catalyst was filled into a stainless steel reactor wit...

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Abstract

The invention discloses a method for synthesizing 1,3-butadiene by using a bismuth molybdate catalyst with a nanosheet structure. According to the method, the bismuth molybdate catalyst with the nano-sheet structure is first prepared, and then the nanosheet catalyst is used for the oxidative dehydrogenation of 1-butene to produce 1,3-butadiene. More specifically, a bismuth salt, a molybdenum saltand deionized water are mixed according to a certain molar ratio, the pH value is adjusted by an alkaline solution, the mixture after full stirring is transferred to a PTFE lined container for hydrothermal reaction, the product is subjected to centrifugal separation, washing, drying and roasting, and then the product is subjected to grinding and sieving to obtain the bismuth molybdate catalyst with the nanosheet structure. Compared with a bismuth molybdate catalyst prepared by the traditional co-precipitation method, the catalyst has the nanosheet-shaped morphology, and exhibits better reaction performance in the reaction.

Description

technical field [0001] The invention belongs to the technical field of chemistry and chemical industry, and in particular relates to the application of bismuth molybdate catalyst with nanosheet structure in the catalytic synthesis of 1,3-butadiene Background technique [0002] 1,3-Butadiene is an important petrochemical raw material, especially the basic monomer of synthetic rubber and synthetic resin. There are two main sources of 1,3-butadiene. One is extracted from the C4 fraction produced by the cracking of naphtha; the other is obtained by dehydrogenating n-butene. Naphtha cracking is greatly affected by international oil prices, while n-butene dehydrogenation can effectively utilize resources. Therefore, the oxidative dehydrogenation of n-butene is an area that researchers have been focusing on. The dehydrogenation of n-butene is also divided into two ways: direct catalytic dehydrogenation and oxidative dehydrogenation. Comparing the two dehydrogenation methods, di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/28C07C11/167C07C5/333
CPCB01J23/28C07C5/3335C07C11/167
Inventor 程党国张思泽劳家正陈丰秋詹晓力
Owner ZHEJIANG UNIV
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