Hydrated alumina composition and molded body containing Y-type molecular sieve, preparation method and application, catalyst and preparation method

A technology of hydrated alumina and molding methods, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as difficult transfer, secondary dust pollution, and high water content, so as to avoid dust pollution and improve The effect of working environment and simplifying the process flow

Active Publication Date: 2020-07-28
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0014] (1) Pseudo-boehmite that has not been completely dried has strong viscosity, is difficult to transfer, and easily causes secondary dust pollution;
[0015] (2) Drying starts from the surface. The drying of the wet solid product separated from the mixture obtained from the gelling reaction is incomplete drying, so there is a sandwich biscuit phenomenon, that is, the surface of part of the pseudo-boehmite is dried (that is, the dried surface is substantially free of free water), while the interior is still wet (that is, for the non-dried interior, the content of free water is basically maintained at the level before drying), since the surface is dried, Therefore, hard particles are formed. When peptizing agent and / or binder are added to this incompletely dried pseudo-boehmite and kneaded, the hard particles formed during the drying process are in the process of extrusion. It is easy to cause blockage and affect production efficiency;
[0016] (3) It is difficult to stably control the dry base of pseudo-boehmite. The instability of the dry base will cause great interference to the molding process, making the molding process very unstable, resulting in an increase in the amount of unqualified products and low production efficiency;
[0017] (4) CN103769118A adopts a conventional molding process when molding, yet because the dry basis (35%-50%) of the pseudo-boehmite it adopts is far lower than the conventional dry basis content (about 70%), that is The water content is high, and there is basically no extrusion pressure during the extrusion molding process. Therefore, the carrier obtained after the extrudate is dried and roasted has basically no mechanical strength. As long as a little external force is applied, it will be pulverized and has no possibility of industrial application. sex, which is the biggest problem facing the technology

Method used

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  • Hydrated alumina composition and molded body containing Y-type molecular sieve, preparation method and application, catalyst and preparation method
  • Hydrated alumina composition and molded body containing Y-type molecular sieve, preparation method and application, catalyst and preparation method
  • Hydrated alumina composition and molded body containing Y-type molecular sieve, preparation method and application, catalyst and preparation method

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preparation example Construction

[0104] According to the preparation method of the hydrated alumina composition of the present invention, the raw material mixture contains hydrated alumina wet gel, Y-type molecular sieve and a compound having at least two proton acceptor sites. The compound having at least two proton acceptor sites and the Y-type molecular sieve have been described in detail above, and will not be repeated here.

[0105] The hydrated alumina wet gel can be synthesized by conventional methods, such as one or more of precipitation method (including acid method and alkali method), hydrolysis method, seed separation method and rapid dehydration method. Generally, it is obtained by optionally aging the hydrated alumina gel solution, followed by washing and solid-liquid separation.

[0106] The precipitation method includes acid method and alkali method. The acid method is to carry out precipitation reaction of aluminum salt with basic compound. The alkali method is to carry out precipitation rea...

Embodiment 1

[0243] The alumina hydrate wet gel used in this example is a quasi-alumina hydrogel solution prepared by the acid method (sodium metaaluminate-aluminum sulfate method, obtained from Sinopec Changling Branch) after washing and filtering. The wet filter cake of boehmite (the wet filter cake is coded as SLB-1), after measurement, the i value of the wet filter cake is 78.2%.

[0244] (1) Add 5.48kg Y-type molecular sieve (purchased from Sinopec Catalyst Changling Branch Company in 50kg wet filter cake SLB-1, unit cell constant is The dry basis is 0.75, the sodium oxide content is less than 0.8% by weight), and then 10kg of water is added for mixing and beating for 5 minutes, and then the slurry is filtered with a belt filter to obtain a wet filter cake SLBY-1. The i value of the wet filter cake SLBY-1 was determined to be 80.2%. After the wet filter cake SLBY-1 was roasted at 600°C for 3 hours, it was determined that the weight ratio of alumina to Y-type molecular sieve was 65:35...

Embodiment 2

[0254] (1) Mix 5 kg of wet filter cake numbered SLBY-1 with 500 g of deionized water for beating for 1 minute, then send the resulting slurry into a plate and frame filter press, adjust the pressure of the plate and frame to 0.7 MPa and maintain After 15 minutes, a wet filter cake (coded as LBY-1) was obtained. After determination, the i value of the wet filter cake numbered LBY-1 is 64%.

[0255] (2) 300g of wet filter cake numbered LBY-1 was placed in a beaker, and 4.3g of hydroxyethyl methylcellulose (purchased from Shanghai Huiguang Fine Chemical Co., Ltd., the same below) and 1.7g of scallop powder ( The content of galactomannan is 85% by weight (purchased from Beijing Chemical Reagent Company). After stirring for 10 minutes with a mechanical stirrer, the hydrated alumina composition of the present invention is obtained, and its properties are listed in Table 1.

[0256] (3) Extrude the hydrated alumina composition prepared in step (2) on an F-26 twin-screw extruder with...

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Abstract

The invention discloses a hydrated alumina composition and a preparation method thereof, and a molding body, a preparation method and applications thereof. The hydrated alumina composition contains hydrated alumina, a Y type molecular sieve and a compound having at least two proton acceptor sites, wherein the [phi] value of the composition is less than 5. The present invention further discloses acatalyst using a molding body formed from the hydrated alumina composition as a carrier and having hydrogenation catalysis effect, and a preparation method thereof, and a hydrotreatment method. According to the present invention, the high-strength molding body is prepared by using the hydrated alumina wet gel as the starting raw material, such that the hydrated alumina wet gel drying step is eliminated, the total process is simplified, the total operation energy consumption is reduced, the dust pollution caused by the application of the pseudoboehmite dry glue powder as the raw material is avoided, and the working environment is greatly improved; and the catalyst using the molding body prepared from the hydrated alumina composition as the carrier has high catalytic activity in the hydrotreatment reaction of hydrocarbon oils.

Description

technical field [0001] The invention relates to the technical field of alumina molding, in particular, the invention relates to a hydrated alumina composition containing Y-type molecular sieves and a preparation method thereof, and the invention also relates to a hydrated alumina molding formed from the hydrated alumina composition body and alumina shaped body, and the present invention further relates to a catalyst having hydrogenation catalysis using the shaped body formed from the hydrated alumina composition as a carrier, a preparation method thereof, and a hydroprocessing method using the catalyst. Background technique [0002] In the traditional method, the alumina formed body containing Y-type molecular sieve, especially the γ-alumina formed body containing Y-type molecular sieve, because of its good pore structure, suitable specific surface and high heat resistance stability , often used as an adsorbent or a carrier for a supported catalyst. This kind of alumina is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/08B01J32/00B01J20/18B01J20/28C10G49/08
CPCB01J20/08B01J20/18B01J20/28078B01J20/28083B01J20/2809B01J20/28092B01J29/084B01J35/1052B01J35/1061B01J35/1085B01J35/109C10G49/08
Inventor 辛靖杨清河杨平李明丰聂红赵广乐王轶凡董松涛胡志海
Owner CHINA PETROLEUM & CHEM CORP
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