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Alumina shaped body and its preparation method and application as well as catalyst and its preparation method and hydrotreatment method

A technology of molded body and alumina, applied in the direction of physical/chemical process catalysts, catalyst carriers, chemical instruments and methods, etc., can solve the problems of secondary dust pollution, difficult transfer, high water content, etc., to reduce operating energy consumption and avoid Effects of dust pollution and process simplification

Active Publication Date: 2020-06-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • 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, which is not suitable for industrial applications. possibility, which is the biggest problem facing the technology

Method used

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  • Alumina shaped body and its preparation method and application as well as catalyst and its preparation method and hydrotreatment method
  • Alumina shaped body and its preparation method and application as well as catalyst and its preparation method and hydrotreatment method
  • Alumina shaped body and its preparation method and application as well as catalyst and its preparation method and hydrotreatment method

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preparation example Construction

[0044] According to the first aspect of the present invention, the present invention provides a method for preparing an alumina molded body, the method comprising the following steps: (1) molding a phosphorus-containing alumina hydrate composition to obtain a molded body;

[0045] Optionally, (2) drying the molded product obtained in step (1) to obtain a dried molded product;

[0046] (3) In the presence of water vapor, calcining the molded product obtained in step (1) or the dried molded product obtained in step (2) in an oxygen-containing atmosphere.

[0047] In step (1), the phosphorus-containing hydrated alumina composition contains hydrated alumina, a compound having at least two proton acceptor sites, and a phosphorus-containing compound.

[0048] The alumina hydrate may be one or more selected from alumina trihydrate and alumina monohydrate. The hydrated alumina preferably contains alumina monohydrate, more preferably alumina monohydrate. Specific examples of the hydr...

Embodiment 1

[0176] The hydrated alumina wet gel used in this example is to add sodium phosphate to the hydrated alumina gel solution prepared by the acid method (sodium metaaluminate-aluminum sulfate method, obtained from Sinopec Changling Branch) during the aging process , the phosphorus-containing pseudo-boehmite wet filter cake (this wet filter cake is numbered as SLB-1) obtained after washing with a belt filter, after determination, the i value of this wet filter cake is 77.6%, expressed as P 2 o 5 The calculated phosphorus content is 3% by weight.

[0177] (1) Put 240g of wet filter cake numbered SLB-1 in a beaker, then add 6g of methyl cellulose (purchased from Zhejiang Haishen Chemical Co. The content of sugar is 80% by weight, purchased from Beijing Chemical Reagent Company, the same below), and after stirring with a mechanical stirrer for 10 minutes, the obtained mixture is the phosphorus-containing hydrated alumina composition of the present invention, and its property paramete...

Embodiment 2

[0183] (1) Mix 4kg of wet filter cake numbered SLB-1 with 400g 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 0.7MPa and maintain After 15 minutes, a wet filter cake (coded as LB-1) was obtained. It has been determined that the i value of the wet filter cake numbered LB-1 is 65%.

[0184] (2) Put 600g of wet filter cake numbered LB-1 in a beaker, add 9g of hydroxyethyl methylcellulose (purchased from Shanghai Huiguang Fine Chemical Co., Ltd., the same below) and 3g of Sesame powder (half milk The content of mannan is 85% by weight (purchased from Beijing Chemical Reagent Company). After stirring for 10 minutes with a mechanical stirrer, the phosphorus-containing hydrated alumina composition of the present invention is obtained, and its properties are listed in Table 1.

[0185] (3) Extrude the phosphorus-containing hydrated alumina composition prepared in step (2) o...

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Abstract

The invention discloses an alumina molded body, a preparation method and application thereof and a production molding system. The preparation method comprises optionally drying a molded body of a phosphorus-containing hydrated alumina composition containing hydrated alumina, a compound containing at least two proton acceptor sites and a phosphorus-containing compound and having the phi value of 5or less shown in the description, and roasting the molded body in an oxygen-containing atmosphere in the presence of vapor. The invention also discloses a catalyst using the alumina molded body as a carrier and having hydrogenation catalysis effects, a preparation method thereof and a hydrogenation treatment method. The high strength molded body is prepared from hydrated alumina wet gel as a starting raw material so that the hydrated alumina wet gel drying process is avoided. In molded raw material preparation, water for preparation of the molded material from pseudo-boehmite dry glue powder is avoided so that the overall processes are reduced, overall operation energy consumption is reduced, the dust pollution caused by the use of pseudo-boehmite dry glue powder as a raw material is avoided and the working environment is greatly improved.

Description

technical field [0001] The present invention relates to the technical field of alumina forming, specifically, the present invention relates to an alumina forming body and its preparation method and application, and the present invention also relates to a catalyst using the alumina forming body as a carrier, its preparation method and A hydroprocessing method using the catalyst. Background technique [0002] In traditional methods, alumina shaped bodies, especially γ-alumina shaped bodies, are often used as adsorbents or supported catalysts because of their good pore structure, suitable specific surface area and high heat resistance stability. carrier used. This kind of alumina is usually obtained from dried hydrated alumina, such as pseudo-boehmite, which is shaped, dried, and then calcined at high temperature. [0003] Based on the above understanding, if figure 1 As shown, the prepared hydrated alumina wet gel needs to be dried to obtain pseudo-boehmite dry rubber powde...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/14B01J27/188B01J27/19B01J32/00B01J20/08B01J20/30C10G45/08
CPCB01J20/0259B01J20/08B01J27/14B01J27/188B01J27/19C10G45/08C10G2300/1037C10G2300/201C10G2300/202C10G2300/205C10G2300/70
Inventor 胡大为杨清河聂红刘滨曾双亲孙淑玲邓中活
Owner CHINA PETROLEUM & CHEM CORP
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