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Method for converting polycyclic aromatic hydrocarbons into monocyclic aromatic hydrocarbons

A technology for single-ring aromatics and polycyclic aromatics, applied in the field of conversion of polycyclic aromatics to single-ring aromatics, can solve the problems of low selectivity, low yield of single-ring aromatics, low conversion depth of polycyclic aromatics, etc. High speed, good technical effect, and the effect of delaying the inactivation rate

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

[0008] The technical problem to be solved by the present invention is to overcome the low conversion depth of polycyclic aromatic hydrocarbons when heavy polycyclic aromatic hydrocarbons are converted into single-ring aromatic hydrocarbons in the prior art, low yield and low selectivity of single-ring aromatic hydrocarbons, and catalyst deactivation rate. Fast problem to provide a new method for the conversion of polycyclic aromatic hydrocarbons to monocyclic aromatic hydrocarbons

Method used

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  • Method for converting polycyclic aromatic hydrocarbons into monocyclic aromatic hydrocarbons
  • Method for converting polycyclic aromatic hydrocarbons into monocyclic aromatic hydrocarbons
  • Method for converting polycyclic aromatic hydrocarbons into monocyclic aromatic hydrocarbons

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 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.

[0031] 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

[0033] 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.

[0034] Table 1

[0035] Catalyst number

[0036] F

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 method for converting polycyclic aromatic hydrocarbons into monocyclic aromatic hydrocarbons, 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 technical scheme that polycyclic aromatic hydrocarbon mixtures and hydrogen are taken as the raw materials and are contacted with a catalyst in a fixed bend reactor to react under the conditions that the reaction temperature is 335-440 DEG C, the pressure is 4-7MPa, the weight hourly space velocity is 1-3hr<-1> and the hydrogen / hydrocarbon mole ratio is 4.0-8.0 to generate monocyclic aromatic hydrocarbon mixtures. The method 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 method for converting polycyclic aromatic hydrocarbons into monocyclic aromatic hydrocarbons. Background technique [0002] In recent years, with the continuous deepening of the heavy oil in the world's oil resources, how to effectively use these heavy oil resources to meet and improve people's daily needs on the premise of meeting high standards of environmental protection has become an issue. important research topic. In heavy oil products, the annual output of heavy aromatics is increasing year by year. Except for a small part used as organic solvents, most of them are mixed into fuels. No matter from the perspective of environmental protection or economics, heavy aromatics resources have not been effectively comprehensively utilized. . The source of heavy aromatics mainly exists in the process of catalytic reforming and cracking of hydrocarbons, for example, the content of heavy condensed naphthalene aromatics in cataly...

Claims

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Application Information

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IPC IPC(8): C07C4/12C07C15/08C07C15/04C07C15/06C07C15/073C07C15/02B01J29/80
CPCY02P20/52
Inventor 李旭光郑均林孔德金侯敏陈燕
Owner CHINA PETROLEUM & CHEM CORP
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