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 bismuth molybdate catalysts and catalytic synthesis 1. It can solve problems that have not been studied before, and achieve excellent effects, good stability, and simple processes.

Active Publication Date: 2020-08-07
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] Add 1.2125g Bi(NO 3 ) 3 ·5H 2 Dissolve O in 40ml deionized water, record as solution A, add 0.2207g(NH 4 ) 6 Mo 7 O 24 ·4H 2 O is dissolved in 10ml of deionized water and marked as solution B. Under magnetic stirring, transfer the A and B solutions to a 100ml container lined with polytetrafluoroethylene. After fully stirring, adjust the pH of the mixed solution to 5. Continue to stir for half an hour. The container was sealed and placed in an oven for hydrothermal reaction. The hydrothermal reaction temperature was 180°C and the time was 18h. The reaction product is collected, centrifuged, washed, and dried, and then calcined in a muffle furnace at 500° C. for 4 hours, cooled and then ground and sieved to obtain 40-60 mesh bismuth molybdate nanoplate catalyst.

[0028] Oxidative dehydrogenation reaction process:

[0029] 1 g of the above catalyst was filled into a stainless steel reactor with an inner diameter of 8 mm, and 1-butene was ...

Embodiment 2

[0032] Catalyst preparation process:

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

[0034] Oxidative dehydrogenation reaction process:

[0035] 1 g of the above catalyst was filled into a stainless steel reactor with an ...

Embodiment 3

[0038] Catalyst preparation process:

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

[0040] Oxidative dehydrogenation reaction process:

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

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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 engineering, and specifically relates to the application of a bismuth molybdate catalyst with a nano-sheet 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 extraction from the by-product C4 fraction of naphtha cracking; the other is obtained from the dehydrogenation of n-butene. Naphtha cracking is greatly affected by international oil prices, while the dehydrogenation of n-butene can effectively utilize resources. Therefore, the oxidative dehydrogenation of n-butene is an area that researchers have been paying attention to. The dehydrogenation of n-butene is also divided into two methods: direct catalytic dehydrogenation and oxidative dehydrogenation. Comparing the two de...

Claims

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Application Information

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Patent Type & Authority Patents(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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