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Catalyst for preparation of light olefins and aromatic hydrocarbons and preparation method and application thereof

A technology of low-carbon olefins and catalysts, which is applied in the preparation of low-carbon olefins and aromatics catalysts and their preparation fields, can solve the problems of low utilization of C4 hydrocarbons, and achieve low intracrystalline diffusion resistance, large specific surface area, and small crystal grains Effect

Active Publication Date: 2017-05-24
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 preparation of light olefins and aromatic hydrocarbons and preparation method and application thereof
  • Catalyst for preparation of light olefins and aromatic hydrocarbons and preparation method and application thereof
  • Catalyst for preparation of light olefins and aromatic hydrocarbons and 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 2, 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 preparation of light olefins and aromatic hydrocarbons and a preparation method and application thereof. The preparation method of the catalyst comprises the following steps: using HZSM-5 molecular sieve as a carrier, loading the carrier with an active component gallium, roasting and carrying out electrostatic self-assembly to prepare hollow fiber. The loaded gallium oxide accounts for 0.01-10 wt% of weight of the HZSM-5 molecular sieve. The catalyst of the invention has advantages of simple preparation process, high yield of light olefins and aromatic hydrocarbons and good low-temperature activity.

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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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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