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Hydrocarbon reforming catalyst containing molecular sieve

A reforming catalyst and molecular sieve technology, applied in the reforming of naphtha, petroleum industry, etc., can solve problems such as environmental pollution, easy loss of chlorine, complex reforming operations, etc.

Active Publication Date: 2005-07-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the carrier of reforming catalysts for industrial use is alumina, but its acidity is weak and cannot meet the requirements of reforming reactions. Therefore, it is necessary to introduce chlorine into the carrier to increase the acidity.
However, chlorine is easy to lose during the reforming reaction, and chlorine needs to be replenished frequently to maintain the acidity of the catalyst
The process of supplementing chlorine complicates the reforming operation, and the lost chlorine often causes equipment corrosion and environmental pollution

Method used

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  • Hydrocarbon reforming catalyst containing molecular sieve
  • Hydrocarbon reforming catalyst containing molecular sieve
  • Hydrocarbon reforming catalyst containing molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] The preparation method of catalyst provided by the invention comprises the steps:

[0026] (1) Mix aluminum hydroxide powder and SAPO molecular sieve uniformly at a dry basis weight ratio of 85.0~99.0:1.0~15.0, extrude, dry and roast to obtain the carrier,

[0027] (2) Prepare the impregnating liquid with platinum-containing compound and rhenium-containing compound, impregnate the carrier prepared in step (1) according to the liquid / solid ratio of 1.0-2.0:1, dry and then roast.

[0028] The small-pore SAPO molecular screen described in the above method is selected from SAPO-34, SAPO-35, SAPO-17 or SAPO-44, preferably SAPO-34.

[0029] In the process of preparing the carrier in the above (1) step, first mix the aluminum hydroxide powder with the SAPO molecular sieve according to the dry weight, that is, the weight of the aluminum oxide contained therein, and then add an appropriate amount of water, extrusion aid, and peptizer to knead evenly Post-extrusion strip molding...

example 1

[0039] Preparation of the catalyst of the present invention.

[0040] (1) Prepare a carrier containing SAPO-34 molecular sieve.

[0041]Get 100 grams of aluminum hydroxide powder (produced by South Africa Sasol Company, brand SB), its dry basis weight is 75 grams, mix with 0.75 grams of SAPO-34 molecular sieve, 2 grams of turnip powder, then add 4 grams of citric acid, 3 milliliters 1:1 nitric acid solution, 7 milliliters of 36% acetic acid solution and 60 milliliters of deionized water, fully kneaded and evenly extruded into strips, and then cut into particles with a length of 3-6 mm. Aged at 30°C for 12 hours, dried at 60°C for 6 hours, dried at 120°C for 12 hours, and calcined at 650°C for 4 hours to obtain a bar-shaped carrier b containing SAPO-34 molecular sieve. The content of SAPO-34 in carrier b is shown in Table 1.

[0042] (2) Preparation of catalyst

[0043] Chloroplatinic acid, perrhenic acid and hydrochloric acid were made into an impregnating solution, so that ...

example 2

[0045] Catalyst C was prepared according to the method of Example 1, except that the SAPO-34 added when preparing the carrier was 3.94 grams.

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Abstract

The molecular sieve-containing hydrocarbon reforming catalyst includes catalyst and following active components: VIII metal 0.05-2.0 (in wt% of the carrier, the same below), VIIB metal 0.05-5.0 and halogen 0.5-10.0. The said carrier consists of small pore SAPO molecular sieve 1.0-15.0 wt% and gamma-Al2O3 85.0-99.0 wt%. The catalyst is suitable for the catalytic reformation of naphtha and has relatively high liquid yield and activity stability.

Description

technical field [0001] The invention relates to a hydrocarbon reforming catalyst containing molecular sieves and a preparation method thereof. Specifically, it is a catalyst containing platinum and rhenium suitable for naphtha reforming and a preparation method thereof. Background technique [0002] Catalytic reforming is a process in which naphtha is used as a raw material to produce high-octane gasoline and aromatics, while by-product hydrogen. The reforming catalyst is a bifunctional catalyst comprising an acidic function capable of isomerization and a metal function capable of dehydrocyclization. Therefore, the research focus of reforming catalysts is to improve their acidic function and metal function. At present, the carrier of reforming catalysts for industrial use is alumina, but its acidity is weak and cannot meet the requirements of reforming reactions. Therefore, it is necessary to introduce chlorine into the carrier to increase the acidity. However, chlorine i...

Claims

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Application Information

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IPC IPC(8): C10G35/095
Inventor 陈志祥臧高山王丽新张大庆
Owner CHINA PETROLEUM & CHEM CORP
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