Molecular sieve-containing alumina hydrate composition and shaped body, preparation method and application, catalyst and preparation method

A technology of hydrated alumina and molding method, applied in molecular sieve catalysts, organic compound/hydride/coordination complex catalysts, chemical instruments and methods, etc., can solve the problems of difficult transfer, secondary dust pollution, low production efficiency, etc. , to achieve the effect of simplifying the overall process flow and reducing operating energy consumption

Active Publication Date: 2020-08-18
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Molecular sieve-containing alumina hydrate composition and shaped body, preparation method and application, catalyst and preparation method
  • Molecular sieve-containing alumina hydrate composition and shaped body, preparation method and application, catalyst and preparation method
  • Molecular sieve-containing alumina hydrate composition and shaped body, preparation method and application, catalyst and preparation method

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preparation example Construction

[0107] According to the preparation method of the hydrated alumina composition of the present invention, the raw material mixture contains hydrated alumina wet gel, BETA molecular sieve, ZSM type molecular sieve and a compound having at least two proton acceptor sites. The compound having at least two proton acceptor sites, as well as the BETA molecular sieve and the ZSM molecular sieve have been described in detail above, and will not be repeated here.

[0108] 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.

[0109] The precipitation method includes acid method and alkali method. The acid method is to carry out precipitation reaction of aluminum salt with basic comp...

Embodiment 1

[0245] 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%.

[0246] (1) Add 4.11kg BETA molecular sieves (purchased from Sinopec Catalyst Changling Branch Company, the molar ratio of silicon to aluminum is 50, the dry basis is 0.9, and the sodium oxide content is less than 0.05% by weight) and 0.41 kg to 50 kg wet filter cake SLB-1 kg ZSM-5 molecular sieve (purchased from Sinopec Catalyst Changling Branch Company, the silicon-aluminum mol ratio is 50, the dry basis is 0.91, and the sodium oxide content is less than 0.05% by weight), then add 10kg water and mix for beating for 5 minutes, then use the slurry Filter with a belt filter to obtain wet filter cake SLBY-1. T...

Embodiment 2

[0256] (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. It was determined that the i value of the wet filter cake LBY-1 was 67%.

[0257] (2) 300g of wet filter cake numbered LBY-1 was placed in a beaker, and 4.0g of hydroxyethyl methylcellulose (purchased from Shanghai Huiguang Fine Chemical Co., Ltd., the same below) and 2.0g 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.

[0258] (3) Extrude the hydrated alumina composition prepared in step (2) on an F-26 twin-screw extruder with a cir...

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Abstract

The invention discloses a hydrated alumina composition and a preparation method thereof and a molded body and application thereof. The composition contains hydrated alumina, a BETA molecular sieve, aZSM molecular sieve and a compound with at least two proton acceptor sites and the value of phi of 5 or less. The present invention also discloses a hydrogenation catalyst using the molded body prepared from the hydrated alumina composition as a carrier, a preparation method and a hydrocracking method. The molded body with higher strength is prepared from hydrated alumina wet gel as a starting material, the step of drying of the hydrated alumina wet gel is omitted, the overall process flow is simplified, the overall operation energy consumption is reduced, dust pollution caused by use of pseudoboehmite dry powder as a raw material is avoided, and the working environment is greatly improved. The catalyst using the molded body prepared from the hydrated alumina composition as the carrier shows a higher catalytic activity in hydrocarbon oil hydrocracking.

Description

technical field [0001] The present invention relates to the technical field of alumina forming, in particular, the present invention relates to a hydrated alumina composition containing molecular sieves and a preparation method thereof, and the present invention also relates to a hydrated alumina formed body and a hydrated alumina formed from the hydrated alumina composition. Alumina molded body, the present invention further relates to a catalyst with hydrogenation catalysis using the molded body formed from the hydrated alumina composition as a carrier, a preparation method thereof, and a hydrocracking method using the catalyst. Background technique [0002] In the traditional method, the alumina formed body containing BETA molecular sieve and ZSM type molecular sieve, especially the γ-alumina formed body containing BETA molecular sieve and ZSM type molecular sieve molecular sieve, because of its good pore structure, suitable specific surface and High thermal stability, of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/80B01J31/26B01J31/34B01J32/00B01J35/10B01J20/08B01J20/18B01J20/24B01J20/28C10G47/10C10G47/20
CPCB01J20/08B01J20/186B01J20/24B01J20/28014B01J29/80B01J31/26B01J31/34B01J35/10C10G47/10C10G47/20C10G2300/305C10G2300/70
Inventor 辛靖杨清河杨平李明丰聂红任亮王轶凡董松涛胡志海
Owner CHINA PETROLEUM & CHEM CORP
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