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Reforming catalyst and preparation method thereof

A reforming catalyst, catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, naphtha catalytic reforming, etc., to achieve the effect of good activity and selectivity

Active Publication Date: 2008-10-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The γ-alumina carrier prepared by the above method, due to the limitation of its specific surface area and pore volume, after loading the metal active component, the activity of the catalyst and the selectivity of aromatic hydrocarbons need to be further improved

Method used

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  • Reforming catalyst and preparation method thereof
  • Reforming catalyst and preparation method thereof

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preparation example Construction

[0018] The preparation method of the catalyst provided by the invention comprises the steps of impregnating the gamma-alumina carrier with a solution containing VIII metals, VIIB metals and halogens, followed by drying and calcining.

[0019] The preparation method of the γ-alumina carrier is as follows: adding a peptizer solution to the hydrated alumina powder, kneading, extruding, drying, and then roasting at 400-750°C. The peptizer solution is a solution containing acetic acid , wherein the content of acetic acid is 20-50% of the mass of dry-based alumina in the hydrated alumina powder.

[0020] The content of acetic acid in the peptizer solution described in the method of the present invention is preferably 24-40% of the dry basis alumina mass in the hydrated alumina powder. The mass ratio of the peptizer solution to the hydrated alumina powder is 0.4 to 2.0:1, preferably 0.6 to 1.0:1, and the amount of the peptizer should not be too much, so as not to completely dilute th...

example 1

[0034] Add 80 grams of acetic acid solution with a concentration of 36 mass % into 100 grams of pseudo-boehmite powder (SB powder produced by Sasol Company, wherein the alumina content is 75 mass %, the same below) and mix, knead, and then extrude with an extruder Strip molding. The extruded strands were dried at 120°C for 12 hours, cut into 3-6 mm long particles, and calcined at 650°C for 4 hours to obtain γ-alumina a, whose physical and chemical properties are shown in Table 1.

example 2

[0036] Prepare gamma-alumina by the method for example 1, difference is to add the acetic acid solution of 52 grams, and the turmeric powder that contains 4 grams in the pseudo-boehmite powder, the physical and chemical properties of the obtained gamma-alumina b are shown in Table 1 .

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Abstract

A reforming catalyst comprises Gamma-alumina carrier and the following active components calculated by taking the carrier as primary standard according to the mass percent: 0.1 to 3.0 percent of VIII metal, 0.1 to 3.0 percent of VIIB metal, and 0.5 to 5.0 percent of halogen. The specific surface area of the Gamma- alumina is 210 to 250m<2> / g and the hole volume is 0.5 to 0.55ml / g; wherein, the holes semidiameter of which are less than 2 nanometer account for 2.0 to 5.0 percent of the total hole volume; the holes semidiameter of which are 2 to 5 nanometer accounts for 90 to 94 percent of the total hole volume; the holes semidiameter of which are 5 to 10 nanometer accounts for 3 to 6 percent of the total hole volume; the holes semidiameter of which are more than 10 nanometer accounts for 0.1 to 1.0 percent of the total hole volume. The catalyst used in naphtha reforming has the advantages of high liquid yield and aromatic hydrocarbon yield.

Description

technical field [0001] The invention relates to a naphtha reforming catalyst and a preparation method thereof, in particular to a reforming catalyst containing Group VIII metals and a preparation method thereof. Background technique [0002] Catalytic reforming of naphtha is an important process in petroleum processing technology. The catalyst is generally composed of noble metal active components and alumina carrier. A reforming catalyst with excellent performance has higher requirements on the crystal phase, purity, impurity content and acidity of the alumina carrier. [0003] γ-alumina is widely used as a catalyst carrier because of its suitable specific surface area and pore structure, good hydrothermal stability, and suitable acidity. For reforming catalysts, a large specific surface area is conducive to loading more active metal components to prepare catalysts with better activity, selectivity and stability. γ-alumina can be made from hydrated alumina, usually pseudo...

Claims

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Application Information

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IPC IPC(8): B01J27/045C10G35/09
Inventor 张大庆陈志祥臧高山张玉红
Owner CHINA PETROLEUM & CHEM CORP
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