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Method for producing gasoline by refinery dry gas

A refinery dry gas and gasoline technology, applied in chemical instruments and methods, production of liquid hydrocarbon mixtures, processing of gas mixtures, etc., to achieve the effect of reducing olefin content

Active Publication Date: 2015-05-20
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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  • Method for producing gasoline by refinery dry gas
  • Method for producing gasoline by refinery dry gas

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0023] The preparation method of catalyst of the present invention comprises the steps:

[0024] (1) Mix hydrogen-type ZSM-35 zeolite or hydrogen-type ZSM-35 zeolite and hydrogen-type ZSM-5 zeolite with hydrated alumina, extrude, dry, and roast to obtain a composite carrier,

[0025] (2) treating the composite carrier with water vapor,

[0026] (3) impregnating the hydrothermally treated composite carrier with an impregnating solution containing VA group element compounds and rare earth compounds, then drying and calcining.

[0027] 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.

[0028] (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 5...

example 1

[0036] Preparation of the catalyst used in the present invention.

[0037] (1) Preparation of carrier

[0038] Get 130 grams of HZSM-35 zeolite powder (produced by Jianchang Molecular Sieve Factory) with a silica / alumina molar ratio of 15, 70 grams of pseudo-boehmite powder (produced by German Sasol company, alumina content 75% by mass), add 100g concentration It was peptized with 1.0% by mass nitric acid aqueous solution, kneaded and extruded, dried at 110°C for 8 hours, pelletized, and calcined at 550°C for 4 hours to obtain a composite carrier.

[0039] (2) steam treatment

[0040] Put the composite carrier prepared in step (1) into a tubular reactor, raise the temperature to 550° C. in air flow under 0.1 MPa, and pass in steam for 4 hours, and its α value is 35.

[0041] (3) Preparation of catalyst

[0042] Get 100 gram (2) the composite carrier after the steam treatment of step preparation, be that the phosphoric acid solution of 100mg / ml is soaked 1 hour with 50ml con...

example 2

[0044] Preparation of the double zeolite catalyst used in the present invention.

[0045] (1) Preparation of carrier

[0046] Get 65 grams of HZSM-5 zeolite powder with a silica / alumina molar ratio of 56, 65 grams of HZSM-35 zeolite powder with a silica / alumina molar ratio of 15, and 70 grams of pseudo-boehmite powder, add 100 g of a concentration of 1.0 The mass % nitric acid aqueous solution is peptized, kneaded and extruded, dried at 110° C. for 8 hours, pelletized, and calcined at 550° C. for 4 hours to obtain a composite carrier.

[0047] (2) steam treatment

[0048] Put the composite carrier prepared in step (1) into a tubular reactor, raise the temperature to 550° C. in air flow under 0.1 MPa, and pass in steam for 4 hours to obtain a composite carrier with an α value of 31.

[0049] (3) Preparation of catalyst

[0050] Take 100 grams of the composite carrier after steam treatment in step (2), impregnate it with 50 ml of phosphoric acid solution with a concentration ...

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Abstract

A method for producing gasoline by refinery dry gas comprises a reaction by contacting refinery dry gas with a catalyst under a hydrogen-free condition at 0.1-3.0 MPa and 200-400 DEG C, wherein the catalyst 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 15-85 m% of ZSM-35, and 15-85 m% of a binder. The method can make effective use of ethylene in dry gas, and convert dry gas into a gasoline component with a high octane number and low olefin and benzene contents, and high-quality liquefied gas.

Description

technical field [0001] The invention relates to a method for producing gasoline by using refinery dry gas, specifically, a method for using ZSM series zeolite as a catalyst to synthesize gasoline components from ethylene. 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 amount of ethylene resources is v...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G50/00C10G70/00B01J29/65B01J29/80
Inventor 王子健于中伟马爱增刘洪全
Owner CHINA PETROLEUM & CHEM CORP