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

A technology for polycyclic aromatic hydrocarbons and monocyclic aromatic hydrocarbons, which is applied in the field of catalysts and their preparation, and can solve the problems of low selectivity, low yield of monocyclic aromatic hydrocarbons, and low conversion depth of polycyclic aromatic hydrocarbons.

Active Publication Date: 2017-09-15
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 sulfur-containing polycyclic aromatic hydrocarbons into monocyclic aromatic hydrocarbons and preparation method thereof
  • Catalyst for converting sulfur-containing polycyclic aromatic hydrocarbons into monocyclic aromatic hydrocarbons and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 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 uniform, 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 an elongated 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.

[0034] Prepare a solution of chloroplatinic acid and cerium 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 impregnating for 8 hours and drying , and calcined at 450°C for 3 h to obtain the finished catalyst A.

Embodiment 2～10

[0036] 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.

[0037] Table 1

[0038]

Embodiment 11～20

[0040] Catalysts A~J prepared by Examples 1~10 are investigated on a supercritical fixed-bed reactor (maximum reaction pressure 10MPa, operating temperature is room temperature~600°C) 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.

[0041] Table 2

[0042] Raw material composition

Non-Fang

benzene

Toluene

Ethylbenzene

Xylene

Decalin

tetralin

naphthalene

Dimethyldibenzothiophene

Content (wt%)

0.02

24.54

24.61

...

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Abstract

The invention relates to a catalyst for converting sulfur-containing polycyclic aromatic hydrocarbons into monocyclic aromatic hydrocarbons and a preparation method thereof. The method mainly solves the problems of low conversion depth of sulfur-containing polycyclic aromatic hydrocarbons, low yield and low selectivity of single-ring aromatic hydrocarbons, and fast catalyst deactivation rate existing in the prior art. The present invention comprises the mixture of 30~65% FAU type zeolite and ZSM-12 molecular sieve by adopting catalyst by weight percentage, 33.5~69.8% is selected from at least one in γ-alumina, η-alumina or pseudo-boehmite One is the technical scheme of binder and 0.1-0.5% of at least one metal selected from Pt, Pd or Ir and 0.1-1% of at least one metal selected from La, Ce or Sn, which better solves the problem To solve the above problems, the catalyst can be used in the industrial production of converting sulfur-containing polycyclic aromatic hydrocarbons into single-ring aromatic hydrocarbons.

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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Patent Type & Authority Patents(China)
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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