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Alumina support, preparation method therefor, catalyst, preparation method therefor and method for lowering content of dialkene in hydrocarbon oil

An alumina carrier and catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, catalyst carriers, etc., can solve the problem of arsenic resistance, poor colloid resistance, and insufficient hydrogenation activity. Ideal, not fully utilized and other problems, to achieve the effect of improving catalytic activity, low monoolefin saturation rate, and fast heating rate

Active Publication Date: 2019-11-26
HUNAN CHANGLING PETROCHEM SCI & TECH DEV CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, industrial gasoline selective hydrogenation catalysts mainly include noble metal palladium series and non-noble metal nickel series. The former has high hydrogenation activity, but has poor resistance to arsenic and colloid, poor stability, short operating cycle, and high production cost. ;The latter has a significant price advantage, has a certain arsenic tolerance, anti-glue ability, and good stability, but the hydrogenation activity is not ideal
[0005] Nickel-based catalysts are generally reduced by hydrogen for hydrogenation reaction, but some nickel is still not reduced due to the formation of a fairly stable nickel-aluminum spinel with the support, and cannot be fully utilized.

Method used

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  • Alumina support, preparation method therefor, catalyst, preparation method therefor and method for lowering content of dialkene in hydrocarbon oil
  • Alumina support, preparation method therefor, catalyst, preparation method therefor and method for lowering content of dialkene in hydrocarbon oil
  • Alumina support, preparation method therefor, catalyst, preparation method therefor and method for lowering content of dialkene in hydrocarbon oil

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preparation example Construction

[0039]According to the preparation method of the present invention, introducing an anionic surfactant into the slurry can effectively improve the pore volume, pore size distribution concentration and specific surface area of ​​the final prepared alumina carrier, and can further improve the mechanical properties of the final prepared alumina carrier. strength.

[0040] According to the preparation method of the present invention, the anionic surfactant is phosphoric acid ester and / or dithiophosphoric acid ester.

[0041] The phosphoric acid ester is the phosphoric acid ester shown in formula I,

[0042]

[0043] In formula I, R 1 for C 8 -C 16 Alkyl groups, specific examples of which may include, but are not limited to: octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl and hexadecyl base. Preferably, R 1 for C 10 -C 14 of alkyl.

[0044] The phosphorodithioate is a phosphorodithioate shown in formula II,

[0045]

[0046] In formula II, R ...

Embodiment 1

[0118] With 100g macroporous aluminum hydroxide powder (purchased from Sinopec Changling Catalyst Factory, the ratio of pores with a pore diameter of 10-50nm to the total pores is 65%) and 1.5g scallop powder (purchased from Henan Lankao County Vegetable Gum Factory), 3.0g ethyl cellulose (purchased from Sinopharm Chemical Reagent Co., Ltd.) and 4.0g sodium polyacrylate (purchased from Sinopharm Chemical Reagent Co., Ltd.) were mixed and stirred for 20 minutes, and 3.0mL concentration of 60% by weight of concentrated nitric acid, 5.0 g lauryl phosphate monoester, 11.8 g of magnesium nitrate and 15 mL of deionized water were kneaded for 20 minutes to obtain a slurry. The obtained slurry is fed into an extruder through a die with an inner diameter of 1.5 mm for extrusion molding, and cut into a length of 3-8 mm to obtain a molded product. After the molded product was left at room temperature (25°C) for 40 minutes, it was dried at 120°C for 2 hours in an air atmosphere, and then ...

Embodiment 2

[0134] With 100g macroporous aluminum hydroxide powder (purchased from Changling Catalyst Factory of Sinopec, the ratio of pores with a pore diameter of 10-50nm to the total pores is 75%) and 1.6g of scallop powder (purchased from Henan Lankao County Vegetable Gum Factory) and A mixture of stearic acid at a mass ratio of 1:1, 2.5 g of a mixture of ethyl cellulose (purchased from Sinopharm Chemical Reagent Co., Ltd.) and hydroxyethyl cellulose at a mass ratio of 1:1, and 2.0 g of polystyrene Vinyl alcohol (purchased from Sinopharm Chemical Reagent Co., Ltd.) was mixed and stirred for 30 minutes, and 3.0 mL of 30% by weight aqueous acetic acid solution, 3.5 g of butyl octyl phosphorodithioate, 9.9 g of magnesium acetate and 15 mL of deionized water were added. Kneading was continued for 40 minutes to obtain a slurry. The obtained slurry is fed into an extruder through a die with an inner diameter of 1.5 mm for extrusion molding, and cut into a length of 3-8 mm to obtain a molded...

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Abstract

The invention discloses an alumina support and a preparation method therefor. The alumina support has a pore volume of 0.7mL / g to 1.2mL / g, an average pore size of 100 angstroms to 130 angstroms and aprobable pore size of 60 angstroms to 90 angstroms. The invention further discloses an alumina support employing selective hydrogenation catalyst, a preparation method therefor and a method for lowering content of dialkene in hydrocarbon oil by employing the catalyst. The alumina support disclosed by the invention is large in pore volume and centralized in pore size distribution; and when the hydrogenation catalyst prepared by taking the alumina support as a support serves as a catalyst of a selective hydrogenation reaction or lowering the content of the dialkene in the hydrocarbon oil, the content of the dialkene in the hydrocarbon oil can be effectively lowered, and a relatively low mono-alkene saturation rate is obtained. A product obtained by taking catalytic-cracked gasoline treated by adopting the selective hydrogenation catalyst disclosed by the invention as a feed of an S-Zorb device has the advantages that a dry point is basically unchanged compared with that of a catalytic cracking gasoline raw material, a coking trend of the S-Zorb device is inhibited, and the carbon deposit of the catalyst is obviously reduced.

Description

technical field [0001] The invention relates to an alumina carrier and a preparation method thereof. The invention also relates to a catalyst containing the alumina carrier and a preparation method thereof. The invention further relates to a method for reducing the content of dienes in hydrocarbon oil. Background technique [0002] FCC gasoline contains 20-30% by weight of olefins, and also contains 0.2-1% by weight of diolefins, because diolefins are very easy to undergo polymerization reaction when heated, and can also be used as initiators to initiate olefin polymerization, so diolefins are not harmful to gasoline. In addition to having a relatively large adverse effect on stability, it also causes inconvenience to downstream processes. [0003] As an example, the S-Zorb gasoline adsorption desulfurization technology is to remove sulfide in catalytic cracked gasoline at high temperature, and at the same time, the generated hydrogen sulfide is immediately adsorbed on the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/04B01J32/00B01J23/883B01J35/10C01F7/44C10G49/06
CPCB01J21/04B01J23/002B01J23/883C10G49/06C01F7/441C01P2006/16C01P2006/14B01J2523/00B01J35/638B01J35/635B01J35/647B01J2523/31B01J2523/68B01J2523/847B01J2523/22Y02P20/52
Inventor 李庆华庄甜甜杨清贫匡洪生
Owner HUNAN CHANGLING PETROCHEM SCI & TECH DEV CO LTD
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