Aromatization catalyst and preparation method, regeneration method and aromatization method thereof

A catalyst and aromatization technology, which is applied in the field of aromatization catalyst and its preparation, can solve the problem of selective conversion of olefins to aromatics with liquid yield, short service life of aromatization catalyst, and poor adaptability to industrial scale-up And other issues

Active Publication Date: 2018-09-04
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 o

Method used

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  • Aromatization catalyst and preparation method, regeneration method and aromatization method thereof

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Embodiment 1

[0060] This embodiment provides a method for preparing an aromatization catalyst, which includes the following steps in sequence:

[0061] 1. At room temperature, physically mix the nanoscale HZSM-5 molecular sieve with a silicon-aluminum ratio of 25 and pseudo-boehmite at a ratio of 4:1 to obtain a catalyst precursor.

[0062] 2. Use the method of constant temperature water bath to carry out ion exchange treatment on the catalyst precursor. Specifically, dissolve sodium hydroxide in deionized water, mix it with the catalyst precursor and place it in a water bath environment at 90°C for 2 hours to make the loading capacity of sodium It is about 0.2 wt%, and then dried at about 120°C for about 8 hours and fired at about 540°C for about 4 hours.

[0063] 3. Using the equal volume impregnation method, carry out the first modification treatment on the catalyst precursor treated by ion exchange, specifically dissolving ammonium dihydrogen phosphate in deionized water, and then impr...

Embodiment 2

[0067] This embodiment provides a method for preparing an aromatization catalyst, the specific steps of which are basically the same as in Example 1, the difference being:

[0068] In the process of active metal loading in step 4, the loading amount of zinc is about 8wt%.

[0069] The aromatization catalyst finally obtained in Example 2 is designated as catalyst B.

Embodiment 3

[0071] This embodiment provides a method for preparing an aromatization catalyst, comprising the following steps:

[0072] 1. At room temperature, physically mix the hydrogen-type ZSM-5 molecular sieve with a silicon-aluminum ratio of 25 and nano-scale and pseudo-boehmite at a ratio of 9:1 to obtain a catalyst precursor.

[0073] 2. Use the method of constant temperature water bath to carry out ion exchange treatment on the catalyst precursor. Specifically, dissolve sodium hydroxide in deionized water, mix it with the catalyst precursor and place it in a water bath environment at 90°C for 2 hours to make the loading capacity of sodium It is about 0.5 wt%, and then dried at about 120°C for about 8 hours and fired at about 540°C for about 4 hours.

[0074] 3. Using the equal-volume impregnation method, the first modification is carried out on the catalyst precursor treated by ion exchange, specifically dissolving ammonium dihydrogen phosphate in deionized water, and then impregn...

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Abstract

The invention provides an aromatization catalyst and a preparation method, regeneration method and aromatization method thereof. The preparation method comprises mixing a zeolite molecular sieve and abinder to obtain a catalyst precursor, orderly performing ion exchange modification and first modification treatment on the catalyst precursor, and after hydrothermal treatment, carrying out active metal loading and second modification treatment to obtain the aromatization catalyst. A modification element used in the first modification is at least one selected from metals in the group IA, group VA and lanthanide line in the periodic table, the active metal is at least one element selected from elements in the group VIIB, group VIII, group IB and group IIB, and the modifying element used for the second modification is at least one element selected from elements in the group VA and lanthanide line in the periodic table. The aromatization catalyst has good carbon deposition resistance and high aromatization activity, can complete the aromatization reaction under mild conditions, and has high aromatic selectivity and a liquid yield of 98.5% or more.

Description

technical field [0001] The invention relates to the technical field of catalyst processing and regeneration, 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 ...

Claims

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Application Information

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IPC IPC(8): B01J29/40C10G45/68
CPCB01J29/40B01J29/405C10G45/68
Inventor 赵亮高金森郝天臻董立霞高迪吴晓钰王晓琴曹丽媛徐春明
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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