An aromatization catalyst and its preparation method, regeneration method and aromatization method

Abstract

The invention provides an aromatization catalyst, a preparation method thereof, a regeneration method and an aromatization method. The preparation method comprises the steps: mixing a silicon source,an aluminum source, a templating agent, an alkali source, water and a silane coupling agent according to a molar ratio of (80.0 to 98.5): (0.1 to 20.0): (0.1 to 2.0): (0.01 to 0.2): (1.0 to 14.0): (0.02 to 1.0) for crystallization, calcination and acid exchange to obtain a catalyst carrier; allowing the catalyst carrier to sequentially go through ion exchange modification, first modification treatment, hydrothermal treatment, active metal loading and second modification treatment to obtain the aromatization catalyst. The present invention also provides the aromatization method using the aromatization catalyst and the regeneration method of the aromatization catalyst. The aromatization catalyst has good carbon deposition resistance and high aromatization activity, enables the aromatizationreaction to be carried out under mild conditions, and meanwhile has a high olefin conversion rate and a very high liquid yield.

Description

technical field [0001] The invention relates to the technical field of petroleum processing, in particular to an aromatization catalyst and its preparation method, regeneration method and aromatization method. Background technique [0002] Proven oil resources around the world are becoming increasingly heavy, and the production of clean oil products is becoming more and more difficult. With the increasing impact of vehicle exhaust emissions on the atmospheric environment, countries around the world have increasingly stringent requirements on the quality of gasoline for vehicles. . From January 1, 2019, my country plans to implement the National VI Motor Gasoline Standard, which sets stricter regulations on indicators such as sulfur content and olefin content. [0003] In my country's gasoline pool, catalytic cracking gasoline accounts for as much as 75%. At the same time, because catalytic cracking gasoline (FCC gasoline) has the composition characteristics of high olefins,...

AI Technical Summary

Problems solved by technology

However, the additive modification and active metal loading it implements are all aimed at the aromatization of raw materials with high alkane content, and the effect on the aromatization of olefins is general

[0009] In addition, the aromatization catalysts recorded in other literatures are generally difficult to balance the liquid yield and the selectivity of olefins to aromatics. Usually, the liquid yield can reach 60-70%. In order to pursue high selectivity performance, often at the expense of liquid yield

In actual production, the above-mentioned liquid yield will inevitably cause a large amount of oil loss, seriously affecting the production and economic benefits of the enterprise, which is also one of the factors that currently limit the practical application of aromatization catalysts

Moreover, the catalytic activity of the existing aromatization catalysts is relatively low, and generally the aromatization reaction needs to be completed at 450°C or even higher temperature. temperature means that a large energy consumption

At the same time, the service life of most aromatization catalysts is short, so the adaptability to industrial scale-up is poor, which further restricts the application of aromatization catalysts

So far, there is no good aromatization catalyst that overcomes the above-mentioned multiple deficiencies at present.

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