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Method for producing clean gasoline

A gasoline and clean technology, applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve the problems of limited reduction of gasoline olefin content, influence of target product selectivity, limitation of device operation flexibility, etc., and achieve long operation cycle. , high selectivity and activity, the effect of low octane loss

Active Publication Date: 2014-12-31
CHINA PETROLEUM & CHEM CORP +1
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  • Description
  • Claims
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Problems solved by technology

China University of Petroleum (East China) adopts two-stage series riser process technology (CN1302843A), reacting oil and gas in series, and catalyst relay operation to achieve the purpose of increasing the yield of light oil and improving the quality of catalytic gasoline, but the technical process is complicated and the device operation At the same time, due to the two-stage riser reaction oil-gas series operation, the gasoline upgrading reaction interacts with other reactions, the selectivity of the target product is affected, and the olefin content in gasoline can be reduced by about 15 percentage points.

Method used

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  • Method for producing clean gasoline

Examples

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preparation example Construction

[0040] The preparation method of the hydrodemercaptan catalyst is as follows: the aqueous solution of copper-containing compound, zinc-containing compound and phosphorus-containing compound is heated at 60-100°C to obtain a stable co-impregnation solution, and the above-mentioned co-immersion solution is impregnated once saturated It is obtained by impregnating the carrier, drying at 80-150°C for 2-8 hours, and roasting at 300-600°C for 5-10 hours.

[0041] In the method of the present invention, the preparation of the amorphous alumina, silicon-containing alumina and titanium-containing alumina carrier required for the hydrodesulfurization catalyst and hydrodemercaptan catalyst can be made of amorphous alumina, silicon-containing alumina or Titanium-containing alumina is prepared by adding peptizer, extrusion aid or silica sol, kneading, extruding, drying at 80-150°C for 2-8 hours, and roasting at 500-650°C for 2-5 hours. The amorphous alumina, silicon-containing alumina and ...

example 1

[0053] In this example, an alumina carrier shared by a hydrodesulfurization catalyst and a hydrodemercaptan catalyst is prepared.

[0054] Weigh 1000g pseudo-thin water aluminum hydroxide powder (Al 2 o 3 Dry basis content is 78wt%), adding Al 2 o 3 5wt% squid powder extrusion aid on a dry basis, 200mL of a 10% nitric acid aqueous solution, mixed and rolled to form a plastic powder, and a cylindrical strip with a diameter of 1.5mm was prepared with an extruder, and dried at 120°C 8 hours, calcination at 500° C. for 5 hours to prepare the catalyst carrier T-1.

example 2

[0056] This example prepares a kind of highly active MoO by step-by-step impregnation method 3 (13.0wt%)-CoO(4.0wt%)-P 2 o 5 (1.5wt%)-K 2 O-(2.0wt%) / Al 2 o 3 catalyst.

[0057] Press Catalyst on P 2 o 5 The content is 1.5wt%, K 2 O content is 2.0wt%, take quantitative phosphoric acid, potassium nitrate, add deionized water, make 120mL impregnating solution, then, spray on the catalyst carrier prepared in Example 1 of 160g. P 2 o 5 (1.5wt%)-K 2 O-(2.0wt%) / Al 2 o 3 Catalyst intermediate.

[0058] MoO on Catalyst 3 The content is 13.0wt%, and the CoO content is 4.0wt%. Take quantitative molybdenum oxide and basic cobalt carbonate, add deionized water to make 60mL impregnation solution, and then spray it on 80g of the above-mentioned catalyst intermediate. Highly active MoO was prepared by drying at 120°C for 8 hours and calcining at 490°C for 6 hours 3 (13.0wt%)-CoO(4.0wt%)-P 2 o 5 (1.5wt%)-K 2 O-(2.0wt%) / Al 2 o 3 catalyst. The catalyst is referred to as HAC...

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Abstract

The invention discloses a method for producing clean gasoline. The method adopts a dual-riser, dual-settler and dual-fractionating tower catalytic cracking technology to make heavy oil and gasoline react in different riser reactors respectively. Secondary catalytic cracking crude gasoline from an auxiliary fractionating tower undergoes a selective hydrodesulfurization reaction through a high activity / low activity combined hydrogenation catalyst. The condensed oil from main fractionating tower and auxiliary fractionating tower tops undergoes a selective hydrogenation mercaptan removal reaction. The mercaptan removal product of the condensed oil and the hydrodesulfurization product of the secondary catalytic cracking crude gasoline are mixed to form sulfur-free clean gasoline with a sulfur content of not more than 10 micrograms / g and an octane number loss of not greater than 1.0 unit. While realizing deep desulfurization, the method provided in the invention reduces the octane number loss of the product, and also can greatly reduce the equipment energy consumption.

Description

technical field [0001] The present invention relates to a method for producing clean gasoline, in particular, the present invention relates to a combined process using double riser, double settler and double fractionation tower catalytic cracking technology and selective hydrodesulfurization. Background technique [0002] Reducing the sulfur content of gasoline can greatly reduce the emission of harmful substances in automobile exhaust. Therefore, the new standards of clean gasoline in various countries in the world have put forward stricter and stricter restrictions on sulfur content. The European Category IV vehicle exhaust emission standard (EU2005 standard) stipulates that after 2005, the sulfur content of gasoline is ≯50μg / g, and the olefin content is ≯18v%. After 2009, the new standard of "sulfur-free gasoline (ULSG)" with a sulfur content of less than 10μg / g will be implemented . US U.S.EPA Tier 2-II standard stipulates that the sulfur content of American clean gasol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/00
Inventor 尤百玲关明华赵乐平庞宏王继锋刘继华房莹
Owner CHINA PETROLEUM & CHEM CORP
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