A kind of desiliconization agent and its preparation method and application

A technology of desilication agent and extrusion aid, which is used in chemical instruments and methods, refined hydrocarbon oil, catalyst protection, etc., to achieve good economic benefits and application prospects, improve desulfurization, and avoid deactivation effects.

Active Publication Date: 2016-02-24
NORTHEAST GASOLINEEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the prior art, there are few reports on the use of mesoporous Y-type molecular sieve as the carrier of desiliconization agent for distillate oil

Method used

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  • A kind of desiliconization agent and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Get 100gNaY molecular sieve (SiO 2 / Al 2 o 3 The molar ratio is 5.4, the mesopore volume is 0.03mL / g), added to the 4In the 1000mL aqueous solution of Cl, exchange at 85°C for 1.5 hours. During this process, the pH value is controlled to be 3.5. After the exchange, filter, wash with water, and dry. Treat under the condition of 0.2MPa vapor pressure for 2 hours; then carry out the second ammonium exchange according to the same conditions, after the exchange, filter, wash with water, dry, and then in a 100% water vapor atmosphere, at a temperature of 525 ° C, the water vapor pressure Under the condition of 0.2MPa, treat for 2 hours; the SiO 2 / Al 2 o 3 The molar ratio is 16.4, and the specific surface area is 713m 2 / g, mesopore volume 0.21mL / g, pyridine infrared acid content 0.14mmol / g.

Embodiment 2

[0039] Get the mesoporous Y-type molecular sieve 25g among the embodiment 1, and 75g pseudo-boehmite (for example, the pseudo-boehmite produced by SASOL company, wherein the monoboehmite content is 70wt%), 2.3g fenugreek powder, mix After uniformity, a mixed solution of 2.6g concentrated nitric acid (96wt%), 1.9g citric acid and 76.5g water was added dropwise, extruded into a clover shape of about 1.5mm, dried at 110°C, and calcined in an air atmosphere at 500°C for 4 hours. Then soak 20g of nickel nitrate and 35g of ammonium heptamolybdate in 100mL of water for 2 hours, and dry in air at 220°C for 4 hours to obtain desiliconization agent A with a specific surface area of ​​415m 2 / g, pore volume 0.51mL / g. According to the specific requirements, it can be crushed or cut into the required particle size or length, and after vulcanization, it can be combined with the hydrorefining catalyst to carry out the hydrogenation reaction.

Embodiment 3

[0041] Get 20g of mesoporous Y-type molecular sieve in Example 1, and 80g pseudo-boehmite (for example, the pseudo-boehmite produced by SASOL company, wherein the monoboehmite content is 70wt%), 2.3g starch, after mixing , dropwise added a mixed solution of 2.6g concentrated nitric acid (96wt%), 1.9g citric acid and 76.5g water, extruded into a clover shape of about 1.5mm, dried at 110°C, and calcined in an air atmosphere at 500°C for 4 hours. Then soak 20g of nickel nitrate and 35g of ammonium heptamolybdate in 100mL of water for 2 hours, and dry in air at 220°C for 4 hours to obtain desiliconization agent B with a specific surface area of ​​403m 2 / g, the pore volume is 0.54mL / g. According to the specific requirements, it can be crushed or cut into the required particle size or length, and after vulcanization, it can be combined with the hydrorefining catalyst to carry out the hydrogenation reaction.

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Abstract

The invention discloses a desiliconization agent and its preparation method and application. The desilication agent contains a carrier and a hydrogenation active metal component loaded on the carrier. The carrier is pseudoboehmite and mesoporous Y-type molecular sieve. The carrier intermediary The content of pore Y-type molecular sieve is 5-25wt%, the active components are VIB group metal oxides and VIII group metal oxides, the metal oxides account for 2-8wt% of the total weight of the desiliconization agent, and the pore volume of the obtained desiliconization agent It is 0.35~0.7mL / g, and the specific surface area is 300~450m2 / g. The desiliconization agent can be used for deep desiliconization of coker gasoline, and protects coker gasoline hydrorefining catalyst from permanent deactivation caused by silicon poisoning.

Description

technical field [0001] The invention relates to a desiliconizing agent and its preparation method and application, more particularly to a desiliconizing agent used for protecting the main catalyst in the hydrogenation process of coker gasoline and its preparation method and application. Background technique [0002] In recent years, crude oil has become heavier and the processing depth has been continuously improved. The processing of heavy oil products has become increasingly important in the refining process. Due to its simple process technology and low investment, delayed coking has become an important means of heavy oil processing and production of light products in my country. Coker gasoline is a major liquid phase product of the delayed coking process. Coking gasoline must be hydrotreated to remove impurities such as sulfur and nitrogen, and improve its stability before it can be used as a vehicle fuel. [0003] In order to prevent foam overflow during delayed coking...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/08B01J29/16B01J33/00C10G45/12
Inventor 吴红军李莉苑丹丹罗明检李金莲王宝辉
Owner NORTHEAST GASOLINEEUM UNIV
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