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Layered composite material as well as preparation method and application thereof

A layered composite material and a composite material technology are applied in the field of layered composite materials and their preparation to achieve the effects of low cost of raw materials, improved selectivity of low-carbon olefins, and increased olefin ratio

Pending Publication Date: 2021-01-01
NINGXIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This electronic additive is mostly introduced by impregnation or mechanical mixing, but in-situ preparation or utilization of the material's own properties are still in the research and exploration stage

Method used

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  • Layered composite material as well as preparation method and application thereof

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Embodiment 1

[0041] A method for preparing a layered magadiite-supported iron-based catalyst of the present embodiment, the method comprises the following steps:

[0042] (1) Preparation of Precursor 1.

[0043] Weigh 3.6 g gas phase SiO 2 , 0.7 gNaOH, 0.94 gNa 2 CO 3 Transfer to a beaker, add 120 mL of deionized water, stir magnetically for 5 min, transfer the solution to a polytetrafluoroethylene-lined autoclave, and crystallize at 220 °C for 27 h. After the reaction kettle was cooled to room temperature, it was taken out, washed, centrifuged, washed with deionized water until the pH value was 7-8, and dried overnight in a vacuum oven at 80°C to obtain precursor 1.

[0044] (2) Preparation of precursor II.

[0045] Weigh 10 g FeCl 3 ·6H 2 0 and 1 g of Triton X-100 were transferred to a beaker, then 145 mL of ethylene glycol was added to the beaker, fully dissolved to obtain a homogeneous solution. Weigh 15 g of anhydrous sodium acetate and dissolve it in 125 ml of 1-2-ethylene gly...

Embodiment 2

[0048] A method for preparing a layered magadiite-supported iron-based catalyst of the present embodiment, the method comprises the following steps:

[0049] (1) Weigh 3.6 g of gas phase SiO 2 , 0.7 gNaOH, 0.94 gNa 2 CO 3 Transfer to a beaker, add 120 mL of deionized water, stir magnetically for 5 min, transfer the solution to a polytetrafluoroethylene-lined autoclave, and crystallize at 220 °C for 27 h. After the reaction kettle was cooled to room temperature, it was taken out, washed, centrifuged, washed with deionized water until the pH value was 7-8, and dried overnight in a vacuum oven at 80°C to obtain precursor 1.

[0050] (2) Disperse 2.52 g of precursor 1 in 50 mL of deionized water, sonicate for 20 min, and mechanically stir for 12 h to obtain solution 1. 0.02 molFeCl 2 4H 2 O and 0.01 mol FeCl 3 ·6H 2 O in N 2 Add it into a three-necked flask containing 50 mL of deionized water under atmosphere, stir it mechanically for 30 min to obtain solution 2, then add ...

Embodiment 3

[0052] (1) Weigh 3.6 g of gas phase SiO 2 , 0.7 gNaOH, 0.94 gNa 2 CO 3 Transfer to a beaker, add 120 mL of deionized water, stir magnetically for 5 min, transfer the solution to a polytetrafluoroethylene-lined autoclave, and crystallize at 220 °C for 27 h. After the reaction kettle was cooled to room temperature, it was taken out, washed, centrifuged, washed with deionized water until the pH value was 7-8, and dried overnight in a vacuum oven at 80°C to obtain precursor 1.

[0053] (2) Weigh 10 g FeCl 3 ·6H 2 0 and 1 g of Triton X-100 were transferred to a beaker, then 145 mL of ethylene glycol was added to the beaker, fully dissolved to obtain a homogeneous solution. Weigh 15 g of anhydrous sodium acetate and dissolve it in 125 ml of 1-2-ethylene glycol. After fully stirring, pour it into the homogeneous solution prepared in the previous step, keep stirring for 30 min, and transfer it to polytetrafluoroethylene. In a lined high-pressure reactor, dry it in an oven at 180°...

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Abstract

The invention relates to a layered composite material as well as a preparation method and application thereof, in particular to a Fe-based material for high-selectivity preparation of alpha-olefin. Acatalyst provided by the invention can inhibit secondary hydrogenation reaction of primary olefinand water gas shift reaction WGS, thereby improving olefin selectivity, effectively reducing CO2 generation, regulating and controlling product distribution with high added value, especially improving the yield of alpha olefin, and having significant industrial application value.

Description

technical field [0001] The invention relates to a layered composite material and its preparation method and application, in particular to an Fe-based material for preparing alpha olefins with high selectivity. Background technique [0002] In the tense situation of world petroleum energy, it is of great strategic significance to vigorously develop the production of low-carbon olefins from synthesis gas. CO and CO 2 Hydrogenation to prepare low-carbon olefins has the advantages of short process, low energy consumption and coal consumption. The direct conversion of synthesis gas to olefins abandons the traditional way of using methanol as an intermediate, and one of the key technologies is the research and development of catalysts. [0003] Limited by the Anderson-Schulz-Flory (A-S-F) distribution of F-T synthesis products, Fe-based catalysts have the problems of wide product distribution and low yield of total olefins. In addition, the non-supported Fe catalyst can obtain ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/78B01J35/02B01J37/00C07C1/04C07C11/02B01J35/00
CPCB01J23/78B01J37/0018C07C1/044C07C1/0445B01J35/00B01J35/30C07C11/02Y02P20/52
Inventor 张建利刘波高新华赵天生马清祥马利海
Owner NINGXIA UNIVERSITY
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