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Catalyst for preparing low-carbon olefins and aromatics, preparation method and application thereof

A technology for low-carbon olefins and catalysts, which is applied in the preparation of low-carbon olefins and aromatics catalysts and their preparation fields. It can solve the problems of low utilization of carbon four hydrocarbons, and achieve the effects of improving catalytic conversion performance, small crystal grains, and large specific surface area.

Active Publication Date: 2021-08-13
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, with the continuous improvement of crude oil processing capacity, refineries by-produce a large amount of C4 hydrocarbons, but the utilization rate of C4 hydrocarbons in my country is low at present, especially most of C4 alkanes are burned as low-value fuels

Method used

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  • Catalyst for preparing low-carbon olefins and aromatics, preparation method and application thereof
  • Catalyst for preparing low-carbon olefins and aromatics, preparation method and application thereof
  • Catalyst for preparing low-carbon olefins and aromatics, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] The preparation of nanometer HZSM-5 molecular sieve is improved and synthesized on the basis of the method reported in the literature. Its XRD spectrum and SEM photo are as follows: figure 1 with figure 2 (Depend on figure 2 It can be seen that the particle size of the nanometer HZSM-5 is 100-150nm, as shown in the small crystal grains and short channels).

[0071] Prepare a certain content of Ga(NO 3 ) 3 Solution, impregnated on the prepared HZSM-5 molecular sieve catalyst by equal volume impregnation method, dried, and calcined at 600°C for 6 hours to obtain Ga 2 o 3 Ga loaded at 0.2wt% 2 o 3 / ZSM-5 catalyst.

[0072] Add 9.625 g of absolute ethanol to the beaker, then add 1.0 g of the dried Ga 2 o 3 / ZSM-5 catalyst. The mixture was stirred overnight after ultrasonication for 3-4 hours, so that the nano-molecular sieves were completely dispersed in ethanol to form a milky white solution. 2g of PVP (Mw=1300000) was added into the suspension and stirred for...

Embodiment 2

[0077] The hierarchically porous HZSM-5 molecular sieve fibers described in Example 1 are loaded with Ga 2 o 3 The catalyst loading was changed to 0.3 wt%. Other conditions are all the same as in Example 1, and the reaction results obtained and the yield of main products are shown in Table 2.

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Abstract

The invention provides a catalyst for preparing low-carbon olefins and aromatics, a preparation method and application thereof. The catalyst uses HZSM-5 molecular sieve as a carrier, and after loading the active component gallium, it is prepared into a hollow fiber by electrostatic self-assembly after roasting, and the supported gallium oxide is 0.01-10 of the weight of the HZSM-5 molecular sieve in terms of weight percentage. %. The preparation process of the catalyst of the invention is simple, the yield of low-carbon olefins and aromatics is high, and the low-temperature activity is good.

Description

technical field [0001] The invention relates to the field of preparation of low-carbon olefins and aromatics, in particular to a catalyst for preparing low-carbon olefins and aromatics, a preparation method and application thereof. Background technique [0002] Low-carbon olefins are very important basic chemical raw materials. Low-carbon olefins generally refer to ethylene, propylene and butadiene, among which ethylene, propylene and their derivatives are the most important, and their demand has been high. Especially for propylene, the growth rate of global propylene demand gradually exceeds that of ethylene, and this trend is expected to continue, so the world may face a shortage of propylene in the future. At the same time, aromatic hydrocarbons such as benzene and toluene are the blending components of high-octane gasoline. In addition, with the continuous improvement of crude oil processing capacity, refineries by-produce a large amount of C4 hydrocarbons, but the util...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/40B01J35/06C07C11/04C07C11/06C07C11/08C07C15/04C07C15/06C07C15/08C07C5/333C07C4/06C07C2/12
CPCY02P20/52
Inventor 姜桂元赵震徐春明韩静刘佳段爱军王雅君刘坚韦岳长
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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