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Catalyst for converting sulphur-containing polycyclic aromatic hydrocarbon into mononuclear aromatic and preparation method of catalyst

A polycyclic aromatic hydrocarbon and monocyclic aromatic hydrocarbon technology is applied in the field of catalysts and their preparation, and can solve the problems of low yield of monocyclic aromatic hydrocarbons, fast catalyst deactivation rate, low selectivity and the like

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] One of the technical problems to be solved by the present invention is to overcome the low conversion depth of polycyclic aromatic hydrocarbons, the low yield of single-cyclic aromatic hydrocarbons and the selection In order to provide a new catalyst for the conversion of sulfur-containing polycyclic aromatic hydrocarbons into monocyclic aromatic hydrocarbons

Method used

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  • Catalyst for converting sulphur-containing polycyclic aromatic hydrocarbon into mononuclear aromatic and preparation method of catalyst
  • Catalyst for converting sulphur-containing polycyclic aromatic hydrocarbon into mononuclear aromatic and preparation method of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] On a dry basis, 25 g FAU type zeolite (commercially available hydrogen type), 25 g ZSM-12 molecular sieve (commercially available hydrogen type) and 50 g γ-Al 2 o 3(Industrial product) Add to the mixer until homogeneous, then add 3 g of scallop powder, 5 g of HNO at a volume ratio of 1:1 to the mixture 3 solution and 40 g deionized water, and grind evenly to make a dough suitable for extrusion. It was extruded through a die in the shape of a slender cylinder (diameter 1.7 mm), dried at 120 °C and calcined at 550 °C for 4 h, and then cut into carrier particles (1.7 × 4.0 mm) with the same size. for Z1.

[0035] Prepare a solution of chloroplatinic acid and cerous nitrate to impregnate the carrier particles at 40°C. The impregnating solution contains 0.25% of Pt and 0.25% of Ce on a dry basis of the carrier. After 8 hours of impregnation and drying , and calcined at 450°C for 3 h to obtain the finished catalyst A.

[0036]

Embodiment 2～10

[0038] According to the preparation method and process provided in Example 1, a series of finished catalysts were prepared by changing the carrier composition and the type and content of metal precursors in the impregnation solution, as shown in Table 1.

[0039] Table 1

[0040]

Embodiment 11～20

[0042] Catalysts A~J prepared in Examples 1~10 are investigated on a supercritical fixed-bed reactor (maximum reaction pressure 10MPa, service temperature is room temperature~600 ℃) and the mixture of sulfur-containing polycyclic aromatic hydrocarbons is converted into BTX (wherein B is Benzene, T is toluene, X is xylene) and other single-ring aromatic hydrocarbons. Table 2 is the evaluation raw material composition. The catalyst is loaded with 5 g, and at a reaction temperature of 370 ° C, a reaction pressure of 6 MPa, and a weight hourly space velocity of 2.0 hr -1 , Hydrogen / hydrocarbon molar ratio of 6.0 and contact with the catalyst, the product is recovered and component detection, the conversion results are shown in Table 3.

[0043] Table 2

[0044] Raw material composition Non-Fang benzene Toluene Ethylbenzene Xylene Decalin tetralin naphthalene Dimethyldibenzothiophene Content (wt%) 0.02 24.54 24.61 5.00 0.02 14.81 15.25 15...

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Abstract

The invention relates to a catalyst for converting sulphur-containing polycyclic aromatic hydrocarbon into mononuclear aromatic and a preparation method thereof and mainly aims at solving the problems that the conversion level of the sulphur-containing polycyclic aromatic is low, the yield of the mononuclear aromatic is low, the selectivity is low and the catalyst deactivation rate is high in the prior art. The catalyst for converting the sulphur-containing polycyclic aromatic hydrocarbon into the mononuclear aromatic comprises the following components in percentage by weight: 30-65% of a mixture of FAU-type zeolite and a ZSM-12 molecular sieve, 33.5-69.8% of at least one selected from gamma-alumina, eta-alumina and pseudo boehmite, which serves as a binding agent, 0.1-0.5% of at least one metal selected from Pt, Pd and Ir, and 0.1-1% of at least one metal selected from La, Ce and Sn. By adopting the technical scheme, the problems are relatively well solved, and the catalyst for converting the sulphur-containing polycyclic aromatic hydrocarbon into the mononuclear aromatic can be applied to the industrial production of converting the sulphur-containing polycyclic aromatic hydrocarbon into the mononuclear aromatic.

Description

technical field [0001] The invention relates to a catalyst for converting sulfur-containing polycyclic aromatic hydrocarbons into monocyclic aromatic hydrocarbons and a preparation method thereof. Background technique [0002] In recent years, with the continuous deepening of heavy oil products and the limited oil resources in the world, in order to meet the growth of oil demand brought about by economic development, through the development of deep conversion of heavy oil, the production of light oil products with high added value will still be increased. It is a major development strategy for the oil refining industry in the 21st century. At present, the heavy aromatics raw materials produced by refineries not only contain a large amount of polycyclic aromatic hydrocarbons, but also contain impurities such as sulfur and nitrogen, which are very difficult to handle, and are mostly used as blending components of low value-added fuel oil or gas oil Use, eg, light cycle oil (L...

Claims

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Application Information

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IPC IPC(8): B01J29/80C07C4/26C07C15/02
Inventor 郑均林李旭光孔德金侯敏
Owner CHINA PETROLEUM & CHEM CORP
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