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Aromatization catalyst and preparation method thereof

A catalyst and aromatization technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, molecular sieve catalyst, etc., can solve the problems of low yield of aromatics and unrelated catalyst life, achieve high yield of aromatics and shorten production Time, reduce the effect of carbon deposition

Active Publication Date: 2012-07-18
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The aromatization catalyst disclosed in Chinese patent CN1070847A is based on HZSM-5 zeolite (SiO 2 :Al 2 o 3 =40~100) as the carrier, introduce Ga, Zn, Pt as active components by conventional impregnation method, and remove part of the aluminum in the ZSM-5 skeleton by steam treatment, and the three metals are impregnated twice, And there is the problem of low aromatics yield, the initial aromatics yield is 53.15%, and the average aromatics yield is 45.50%
The yield of aromatics is relatively high, but it does not involve the life of the catalyst, and the data are all obtained at the initial stage

Method used

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  • Aromatization catalyst and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Catalyst C of the present invention 1 The preparation method is as follows:

[0024] (1) Preparation of carrier D

[0025] Put 200 grams of HZSM-5 molecular sieve with an average particle size of 60 nanometers into a hydrothermal treatment furnace, with a water injection rate of 200 ml / h, a pressure of 0.2 MPa, a heating rate of 5 / min, and a treatment at 600 °C for 4 hours.

[0026] Get 65 grams of HZSM-5 molecular sieve after the above-mentioned hydrothermal treatment, 48.6 grams of pseudo-boehmite (SB powder produced by German sasol company, dry basis is 72wt%) and 3 grams of succulent powder and mix well, then add 70mL of water, A solution consisting of 4.5 mL of nitric acid (concentration of 66.5 wt%) and 3 g of citric acid was thoroughly kneaded to make it into a paste-like plastic material, and a cylindrical bar with a diameter of 1.5 mm was extruded on an extruder, and dried at 110 ° C for 8 hours , and then calcined at 550 °C for 4 h in an air atmosphere to ob...

Embodiment 2

[0032] Catalyst C of the present invention 2 The preparation method is as follows:

[0033] The catalyst preparation method is the same as that of Example 1, except that the ratio of the impregnation solution is: ZnCl with a zinc content of 4wt% 2 15 grams of the solution, 3 grams of a chloroplatinic acid solution with a platinum content of 1 wt %, 4 grams of a perrhenic acid solution with a rhenium content of 1.51 wt %, and 45 grams of deionized water. Its composition is shown in Table 1, and the evaluation results are shown in Table 2.

Embodiment 3

[0035] Catalyst C of the present invention 3 The preparation method is as follows:

[0036] The catalyst preparation method is the same as that of Example 1, except that the ratio of the impregnation solution is: ZnCl with a zinc content of 4wt% 2 15 grams of the solution, 3 grams of a chloroplatinic acid solution with a platinum content of 1 wt %, 6 grams of a perrhenic acid solution with a rhenium content of 1.51 wt %, and 45 grams of deionized water. Its composition is shown in Table 1, and the evaluation results are shown in Table 2.

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Abstract

The invention discloses an aromatization catalyst and a preparation method thereof. A carrier of the aromatization catalyst comprises a nano HZSM-5 molecular sieve treated by water vapor and having active components of zinc, platinum and rhenium. The content of the nano HZSM-5 molecular sieve treated by water vapor in the carrier is 10% to 90%; the content of the metal zinc is 0.5% to 5% of the weight of the carrier; the content of the metal platinum is 0.05% to 0.4% of the weight of the carrier; and the content of the metal rhenium is 0.05% to 0.5% of the weight of the carrier. The aromatization catalyst of the invention is prepared by using an immersion method, can be used for the aromatization process of various light hydrocarbons, and has the advantages of high aromatics yield and the like.

Description

technical field [0001] The invention relates to an aromatization catalyst and a preparation method thereof, in particular to a low-carbon hydrocarbon aromatization catalyst with nano-scale ZSM-5 molecular sieve as a main carrier and a preparation method thereof. Background technique [0002] With the decreasing of petroleum resources, the research of transforming abundant and cheap light hydrocarbons into high value-added benzene, toluene and xylene (BTX) has become an important research topic and hot issue. Light hydrocarbon aromatization is a new process for producing aromatic hydrocarbons developed in recent years, which is used to produce aromatic hydrocarbons or blending components of high-octane gasoline. Compared with catalytic reforming technology, aromatization of light hydrocarbons has the following characteristics: a wide range of raw materials; the reaction can be carried out under low pressure and non-hydrogen conditions; the zeolite catalyst used has certain an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/48B01J37/02B01J37/10C07C15/02C07C5/41C10G45/70
Inventor 贾立明刘全杰徐会青王伟
Owner CHINA PETROLEUM & CHEM CORP