Catalyst for producing gasoline by refinery dry gas and preparation method thereof

A refinery dry gas and catalyst technology, applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve the effects of high gasoline yield, long single-pass life, and less carbon deposition

Active Publication Date: 2013-03-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although studies on ethylene superposition have been reported, there is little research on catalysts for the production of gasol

Method used

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  • Catalyst for producing gasoline by refinery dry gas and preparation method thereof
  • Catalyst for producing gasoline by refinery dry gas and preparation method thereof
  • Catalyst for producing gasoline by refinery dry gas and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] The preparation method of the catalyst of the present invention includes the following steps:

[0020] (1) Mix hydrogen-type ZSM-5 zeolite and hydrogen-type ZSM-35 zeolite with hydrated alumina uniformly, extrude, and dry and roast to obtain a composite carrier.

[0021] (2) Treat the composite carrier with steam,

[0022] (3) The composite carrier after the steam treatment is impregnated with an impregnating solution containing the VA element compound and the rare earth compound, and then dried and calcined.

[0023] In the above method, step (1) is the preparation of the composite carrier, and the hydrated alumina is preferably pseudo-boehmite. It is preferable to add a peptizer to knead the powder during molding, and the peptizer is preferably nitric acid or acetic acid.

[0024] (2) The step is to perform steam treatment on the composite carrier to adjust the alpha value of the composite carrier. The temperature of the steam treatment is 450 to 700°C, preferably 500 to 600°...

Example Embodiment

[0044] Example 1

[0045] Preparation of the catalyst of the invention

[0046] The catalyst was prepared according to the method of Comparative Example 3, except that in step (1) 92.8 g of HZSM-5 zeolite powder with a silica / alumina molar ratio of 56 and 37.2 g of HZSM-35 with a silica / alumina molar ratio of 15 The zeolite powder and 70 g pseudo-boehmite powder are mixed uniformly, and 100 g of a 1.0 mass% aqueous nitric acid solution is added for peptization. The composite carrier is obtained by extrusion, drying, and roasting. The α value is 29 after steam treatment. Then, the carrier after the steam treatment was introduced into phosphorus and mixed rare earth according to step (3). The composition of the prepared catalyst D is shown in Table 1.

Example Embodiment

[0047] Example 2

[0048] The catalyst was prepared according to the method of Comparative Example 3, except that (1) 37.2 grams of HZSM-5 zeolite powder with a silica / alumina molar ratio of 56 and 92.8 grams of HZSM-35 with a silica / alumina molar ratio of 15 Zeolite powder and 70 grams of pseudo-boehmite powder are mixed, 100 g of 1.0% by mass aqueous nitric acid solution is added for peptization, and the composite carrier is obtained by extrusion, drying, and roasting. After steam treatment, its α value is 33. Then the carrier after steam treatment was introduced into phosphorus and mixed rare earths according to step (3). The composition of the prepared catalyst E is shown in Table 1.

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Abstract

A catalyst for producing gasoline by refinery dry gas comprises 1.0-13.0 m% of VA-group element oxides, 0.1-5.0 m% of rare earth oxide, and 86-98.9 m% of a composite carrier; the composite carrier comprises 15-75 m% of ZSM-5 zeolite, 15-75 m% of ZSM-35, and 10-70 m% of a binder.

Description

technical field [0001] The invention relates to a catalyst for producing gasoline from light hydrocarbons and a preparation method thereof, in particular to a catalyst for producing gasoline by using refinery dry gas and a preparation method thereof. Background technique [0002] Refinery dry gas mainly comes from the secondary processing of crude oil, such as catalytic cracking, thermal cracking, delayed coking, hydrocracking, etc. Among them, catalytic cracking dry gas has the largest output and the highest yield. FCC dry gas contains hydrogen, ethylene, ethane, propylene and other components. The ethylene content is about 12-20% by volume. Since there is no effective means of utilization, this part of ethylene is discharged into the gas pipeline network and burned as fuel. According to statistics, in 2009, the country's catalytic cracking processing capacity was about 12 million tons per year, and the total potential ethylene content was nearly 1.2 million tons. The amou...

Claims

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Application Information

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IPC IPC(8): B01J29/80C10G50/00
Inventor 王子健于中伟马爱增孔令江孙义兰
Owner CHINA PETROLEUM & CHEM CORP
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