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Boron-containing hydrated alumina composition and molded body, preparation method and application thereof, catalyst and preparation method thereof

A technology of boron hydrated alumina and hydrated alumina, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve transfer difficulties, high water content, secondary Dust pollution and other problems, to achieve the effect of simplifying the process, simplifying the process, and reducing operating energy consumption

Active Publication Date: 2018-05-08
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 and has no possibility of industrial application. sex, which is the biggest problem facing the technology

Method used

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  • Boron-containing hydrated alumina composition and molded body, preparation method and application thereof, catalyst and preparation method thereof
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  • Boron-containing hydrated alumina composition and molded body, preparation method and application thereof, catalyst and preparation method thereof

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preparation example Construction

[0120] According to the preparation method of the hydrated alumina composition of the present invention, in a more preferred embodiment, the compound having at least two proton acceptor sites contains galactomannan and cellulose ether. The shaped bodies formed from the composition according to this more preferred embodiment have higher strength. Further preferably, the compound having at least two proton acceptor sites is preferably galactomannan and cellulose ether.

[0121] In this more preferred embodiment, based on the total amount of the compound having at least two proton acceptor sites, the content of the galactomannan may be 10-70% by weight, preferably 15% by weight. -68% by weight, more preferably 20-65% by weight; the content of the cellulose ether may be 30-90% by weight, preferably 32-85% by weight, more preferably 35-80% by weight.

[0122] The content of the boron-containing compound in the raw material mixture can be selected according to the content of boron ...

Embodiment 1

[0260] The hydrated alumina wet gel used in this example is the addition of boric acid 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 boron-containing pseudo-boehmite wet filter cake (this wet filter cake is numbered as SLB-1) obtained after washing with a belt filter has been measured, and the i value of this wet filter cake is 78.0%. 2 o 3 The calculated boron content is 5% by weight.

[0261] (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 sugar content is 80% by weight, purchased from Beijing Chemical Reagent Company, the same below), and after being stirred by a mechanical stirrer for 10 minutes, the obtained mixture is the boron-containing hydrated alumina composition of the present invention, and its property parameters are listed in Table 1 lis...

Embodiment 2

[0266] Adopt the same method as Example 1 to prepare alumina dry strips and catalysts, the difference is that in step (4), the hydrated alumina dry strips prepared in step (3) are calcined at 980° C. in an air atmosphere for 3 hours to obtain The properties and parameters of alumina dry strip OT-2 are listed in Table 1.

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Abstract

The invention discloses a boron-containing hydrated alumina composition and molded body, a preparation method and application thereof, a catalyst and a preparation method thereof. The composition contains hydrated alumina, a compound having at least two proton acceptor sites and a boron-containing compound. The composition has the phi value of 5 or less shown in the description. The invention alsodiscloses a catalyst using the molded body of the boron-containing hydrated alumina composition 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 molding 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 molding, specifically, the present invention relates to a boron-containing hydrated alumina composition and a preparation method thereof, and the present invention also relates to a boron-containing hydrated alumina formed body formed from the boron-containing hydrated alumina and an alumina shaped body, the present invention further relates to a catalyst having hydrogenation catalysis using the shaped body formed from the boron-containing hydrated alumina composition as a carrier, a preparation method thereof, and a hydrogenation treatment 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 ...

Claims

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Application Information

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IPC IPC(8): B01J21/04B01J23/882B01J23/883C10G45/08
CPCC10G45/08B01J21/04B01J23/882B01J23/883B01J37/0009C10G2300/202B01J35/647
Inventor 刘滨杨清河聂红曾双亲胡大为赵新强施瑢贾燕子
Owner CHINA PETROLEUM & CHEM CORP
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