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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 gasoline fractions from ethylene in refinery dry gas, mainly focusing on catalysts for the aromatization of liquefied gas and naphtha

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
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preparation example Construction

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

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

[0021] (2) treating the composite carrier with water vapor,

[0022] (3) impregnating the steam-treated composite carrier with an impregnating solution containing VA group element compounds and rare earth compounds, then drying and calcining.

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

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

example 1

[0045] Prepare catalyst of the present invention

[0046] Prepare catalyst by the method for comparative example 3, difference is (1) step gets 92.8 grams of silicon oxide / alumina mol ratios and be that the HZSM-5 zeolite powder of 56, 37.2 grams of silicon oxide / alumina mol ratios are the HZSM-35 of 15 Zeolite powder and 70 g of pseudo-boehmite powder were mixed evenly, and 100 g of nitric acid aqueous solution with a concentration of 1.0% by mass was added for peptization. The composite carrier was obtained by extruding, drying, and roasting. After steam treatment, its α value was 29. Then, the steam-treated carrier was introduced into phosphorus and mixed rare earths according to the method of step (3), and the composition of the prepared catalyst D was shown in Table 1.

example 2

[0048] Prepare catalyst by the method for comparative example 3, difference is (1) step gets 37.2 grams of silica / alumina mol ratios and is the HZSM-5 zeolite powder of 56, and 92.8 grams of silica / alumina mol ratio is the HZSM-35 of 15 Zeolite powder and 70 g of pseudo-boehmite powder were mixed evenly, and 100 g of nitric acid aqueous solution with a concentration of 1.0% by mass was added for peptization. The composite carrier was obtained by extruding, drying, and roasting. After steam treatment, its α value was 33. Then, the steam-treated carrier was introduced into phosphorus and mixed rare earths according to the method of step (3), and the composition of the prepared catalyst E was 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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