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Method of producing catalytic reforming raw materials

A technology for catalytic reforming and raw materials, applied in chemical instruments and methods, catalyst carriers, catalyst activation/preparation, etc., can solve the problems of reduced liquid yield, unsuitable carrier, high cracking activity, etc., and achieves strong anti-coking performance, Good chemical and thermal stability, high denitrification performance

Active Publication Date: 2014-01-15
PETROCHINA CO LTD
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Problems solved by technology

[0005] CN1267187C discloses a silica-alumina containing pseudo-boehmite structure, the carrier silica content is high, and the silicon-containing compound solution is directly or co-currently introduced into the pseudo-boehmite slurry, the purpose It is to increase the content of four-coordinated aluminum to increase the acid strength and acid amount of alumina. The prepared silicon-containing alumina has high cracking activity. However, the higher cracking activity is used as a hydrogenation catalyst carrier, which reduces the liquid yield.
However, the composite oxide prepared by this method has a large number of micropores, which is not suitable for use as a carrier for hydrotreating catalysts for low- and medium-distillate oils.

Method used

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  • Method of producing catalytic reforming raw materials
  • Method of producing catalytic reforming raw materials

Examples

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preparation example Construction

[0055] Embodiment uses the preparation of catalyst 1~7:

[0056] Preparation of Catalyst 1:

[0057] Configure 2L concentration of 120gAl 2 o 3 / L of sodium metaaluminate solution is placed in the glue tank, the temperature of the glue tank is controlled at 40°C, and 65v% CO is introduced under stirring conditions. 2 Mixed gas of +35v% air, the flow rate of carbon dioxide in the mixed gas is 3Nm 3 / h. When the pH value reaches 10.0, stop feeding the mixed gas, and then age for 18 minutes to obtain pseudo-boehmite slurry.

[0058] Configure 2L concentration of 120gAl 2 o 3 / L sodium metaaluminate solution is placed in the gel tank, and then add 2L 80gSiO 2 / L sodium silicate solution, control the temperature of the glue tank at 35°C, and feed 60v% CO 2 Mixed gas of +40v% air, CO in the mixed gas 2 The flow rate is 3Nm 3 / h, the pH at the end point was controlled to be 10.0, and the amorphous silicon-aluminum slurry was obtained by aging for 10 minutes.

[0059] Under...

Embodiment 1

[0095] The hydroprocessing reactor adopts an adiabatic fixed bed and uses catalyst 1. Carry out sulfuration of the catalyst first: add carbon disulfide to cyclohexane to make sulfurized oil with a sulfur content of about 1000 μg / g, and start to feed the sulfurized oil when the reactor is heated up to 240°C, the pressure is 2.5Mpa, and the volumetric space velocity of the sulfurized oil is 3.0h -1 , the hydrogen / sulfurized oil volume ratio is 300:1, and then the temperature is raised to 350°C at a heating rate of 10°C / h and maintained for 25h to complete the sulfurization treatment of the catalyst.

[0096] After the vulcanization treatment, switch to raw oil 1, the reaction temperature is 240°C, the reaction pressure is 2.4MPa, and the liquid space velocity is 11h -1 , the volume ratio of hydrogen to oil is 80, the operation is 200h, and the sulfur and nitrogen content in the product is sampled and analyzed every 24h. The results are shown in Table 3.

Embodiment 2

[0098] The hydroprocessing reactor adopts an adiabatic fixed bed and uses catalyst 2. Catalyst sulfide treatment method is the same as embodiment 1.

[0099] After the vulcanization treatment, switch to raw oil 2, the reaction temperature is 250°C, the reaction pressure is 2.6MPa, and the liquid space velocity is 10h -1 , the volume ratio of hydrogen to oil is 100, the operation is 200h, and the sulfur and nitrogen content in the product is sampled and analyzed every 24h. The results are shown in Table 3.

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Abstract

The invention provides a method of producing catalytic reforming raw materials. According to the method, hydrotreatment is carried out on the raw materials once and for all. Conditions for a hydrotreatment process are as follows: temperature of a reaction inlet is 200 to 320 DEG C; operational pressure is greater than 2.4 MPa; volume space velocity of fresh raw oil is 4 to 12 / h; a volume ratio of hydrogen to oil is 50 to 300. A hydrotreatment catalyst employed in the invention uses silicon-containing alumina as a carrier, nickel and tungsten as active components, and phosphor and alkali metals and / or alkaline earth metals as auxiliary agents. The method provided in the invention can treat high sulfur- and nitrogen-containing catalytic reforming raw materials which contain a great amount of alkene at the condition of low pressure, and provides qualified raw materials in which sulfur content and nitrogen content are both less than 0.5 mu g / g for a catalytic reforming unit.

Description

technical field [0001] The invention relates to a method for producing raw materials for catalytic reforming, which is especially suitable for the hydrotreating of feeding materials for catalytic reforming units. Background technique [0002] Catalytic reforming process is one of the important processes in oil refining and petrochemical industry. 6 ~C 11 The naphtha distillate is used as the raw material, and the reformed oil rich in aromatics is produced through hydrogen-catalyzed reaction, and hydrogen is produced as a by-product. The catalytic reforming process usually uses double (multi) noble metal catalysts such as platinum-rhenium and platinum-iridium. In order to prevent catalyst poisoning, the sulfur and nitrogen content in the feed are required to be less than 0.5 μg / g. Therefore, the raw material needs to be pre-hydrotreated before entering the reforming unit to remove impurities in the raw oil that are harmful to the catalytic reforming catalyst, including sulf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/12B01J27/188B01J32/00B01J37/04
Inventor 孙利民郑云弟康宏敏常晓昕李晓艳钱颖颉伟林宏秦鹏王廷海吕龙刚王宗宝马好文向永生蒋彩兰
Owner PETROCHINA CO LTD
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