Catalyst for converting polycyclic aromatic hydrocarbons into monocyclic aromatic hydrocarbons and preparation method thereof

A technology for monocyclic aromatic hydrocarbons and polycyclic aromatic hydrocarbons, applied in the field of catalysts and their preparation, can solve the problems of low selectivity, low yield of monocyclic aromatic hydrocarbons, and low conversion depth of polycyclic aromatic hydrocarbons, so as to increase unsaturation and delay loss The effect of live speed and good technical effect

Active Publication Date: 2013-05-29
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, low yield and low selectivity of single-ring aromatic hydrocarbons when catalysts existing in the prior art are us...

Method used

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  • Catalyst for converting polycyclic aromatic hydrocarbons into monocyclic aromatic hydrocarbons and preparation method thereof
  • Catalyst for converting polycyclic aromatic hydrocarbons into monocyclic aromatic hydrocarbons and preparation method thereof
  • Catalyst for converting polycyclic aromatic hydrocarbons into monocyclic aromatic hydrocarbons and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The dry basis is 30g FAU type zeolite (commercially available hydrogen type), 10g BEA type zeolite (commercially available hydrogen type) and 60g γ-Al 2 o 3 (Industrial product) Add to the mixer until uniform, then add 3g of scallop powder, 5g of HNO at a volume ratio of 1:1 to the mixture 3 solution and 40g deionized water, and grind evenly to make a dough suitable for extrusion. It is extruded through a die, and the shape is a slender cylinder (diameter 1.7mm). After drying at 120°C, it is baked at 550°C for 4h, and then it is cut into carrier particles (1.7×4.0mm) with the same size, recorded as Z1.

[0032] Make a solution of chloroplatinic acid and impregnate the carrier particles at 40°C. The amount of Pt contained in the impregnating solution is 0.1% of the weight of the dry basis of the carrier. After 8h of impregnation and drying, it is calcined at 450°C for 3h to obtain a finished catalyst. a.

Embodiment 2～6

[0034] According to the preparation method and process provided in Example 1, a series of finished catalysts were prepared by changing the types of metal precursors in the impregnation solution during the impregnation of Z1 carrier particles, as shown in Table 1.

[0035] Table 1

[0036] Catalyst number

Embodiment 7～12

[0038] According to the preparation method and process provided in Example 1, a series of finished catalysts were prepared by changing the amount of metal impregnated during the impregnation of Z1 carrier particles, as shown in Table 2.

[0039] Table 2

[0040] Catalyst number

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Abstract

The invention relates to a catalyst for converting polycyclic aromatic hydrocarbons into monocyclic aromatic hydrocarbons and a preparation method thereof, mainly solving the problems in the prior art that the conversion level of polycyclic aromatic hydrocarbons is low, the monocyclic aromatic hydrocarbon yield and selectivity are low and the catalyst deactivation rate is high. The problems are better solved by adopting the catalyst and the preparation method thereof. The catalyst comprises 34.5-60wt% of mixture of FAU type zeolite and at least one molecular sieve from MOR, BEA, MFI and MCM-22, 39.5-65wt% of at least one of gamma-alumina, eta-alumina and pseudo-boehmite as a binder and 0.05-0.9wt% of at least one metal from Pt, Pd and Ir. The catalyst can be used in the industrial production of converting heavy polycyclic aromatic hydrocarbons into monocyclic aromatic hydrocarbons.

Description

technical field [0001] The invention relates to a catalyst for converting polycyclic aromatic hydrocarbons into monocyclic aromatic hydrocarbons and a preparation method thereof. Background technique [0002] Benzene, toluene and xylene (BTX) are all important organic chemical raw materials. Benzene is the basic raw material for the preparation of styrene, nylon, polyester and other products; while toluene is used as a blending component of gasoline to increase the octane number, and can also be used to produce paints, adhesives, organic solvents, etc. in industry, agriculture and It is widely used in medicine; xylene is mostly used to produce polyester, chemical fiber and other products, which are closely related to the development of the national economy and people's clothing, food, housing and transportation. In recent years, the demand has been strong and increasing rapidly, and There will be a situation where supply exceeds demand, and it is very urgent to seek technol...

Claims

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Application Information

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IPC IPC(8): B01J29/80C07C15/04C07C15/06C07C15/08C07C4/12C07C4/06
CPCY02P20/52
Inventor 孔德金李旭光郑均林侯敏陈燕
Owner CHINA PETROLEUM & CHEM CORP
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