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

A technology of hydrated alumina and alumina trihydrate, which is applied in the direction of organic compound/hydride/coordination complex catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve secondary dust pollution, transfer difficulties, Problems such as high water content, to achieve the effect of reducing operating energy consumption, avoiding dust pollution, and simplifying the process flow

Active Publication Date: 2020-05-19
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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  • Halogen-containing hydrated alumina composition, molded body, preparation method, catalyst, and preparation method thereof
  • Halogen-containing hydrated alumina composition, molded body, preparation method, catalyst, and preparation method thereof
  • Halogen-containing hydrated alumina composition, molded body, preparation method, catalyst, and preparation method thereof

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preparation example Construction

[0123] According to the preparation method of the halogen-containing hydrated alumina composition of the present invention, the raw material mixture may or may not contain a peptizer. Preferably, relative to 100 parts by weight of hydrated alumina wet gel, the content of the peptizer is less than 5 parts by weight, and the hydrated alumina wet gel is calculated as hydrated alumina. More preferably, the raw material mixture does not contain peptizing agent. That is, the method for preparing the halogen-containing hydrated alumina composition according to the present invention more preferably does not include the step of adding a peptizing agent to the raw material mixture.

[0124] According to the preparation method of the halogen-containing hydrated alumina composition of the present invention, conventional methods can be used to mix the hydrated alumina wet gel with the compound having at least two proton accepting sites. The alumina hydrate wet gel can be mixed with a comp...

Embodiment 1

[0236] 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%.

[0237] (1) Put 200g of wet filter cake numbered SLB-1 in a beaker, then add 0.6g of NH 4 F, 5g methyl cellulose (purchased from Zhejiang Haishen Chemical Co., Ltd.) and 3g scallop powder (the content of galactomannan is 80% by weight, purchased from Beijing Chemical Reagent Company), using a mechanical stirrer to stir for 10 minutes Finally, the obtained mixture is the halogen-containing hydrated alumina composition of the present invention, and its property parameters are listed in Table 1.

[0238] (2) Put the halogen-containing hydrated alumina composition prepared in step (1) on the F-26 twin-screw extr...

Embodiment 2

[0242] The same method as in Example 1 was used to prepare halogen-containing alumina dry strips, except that in step (4), the hydrated alumina dry strips prepared in step (3) were calcined at 980° C. in an air atmosphere for 3 hours to obtain The property parameters of halogen-containing alumina dry strip OT-2 are listed in Table 1.

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Abstract

The invention discloses a halogen-containing hydrated alumina composition and its preparation method, as well as a shaped body and its preparation method and application. The composition contains hydrated alumina, a halogen-containing compound and a compound with at least two proton acceptor sites. , the value of this composition is not less than 1.8. The invention also discloses a catalyst with a hydrogenation catalytic effect using a shaped body formed of the halogen-containing hydrated alumina composition as a carrier, a preparation method and a hydrogenation treatment method. The present invention uses hydrated alumina wet gel as the starting material to prepare a molded body with higher strength, omits the step of drying the hydrated alumina wet gel, simplifies the overall process flow, and reduces the overall operating energy consumption. Dust pollution caused by using pseudo-boehmite dry glue powder as raw material is avoided. The catalyst prepared by using the shaped body formed of the hydrous oxide composition as a carrier exhibits higher catalytic activity in the hydrotreating of hydrocarbon oil.

Description

technical field [0001] The present invention relates to the technical field of alumina molding, in particular, the present invention relates to a halogen-containing hydrated alumina composition and a preparation method thereof, and the present invention also relates to a hydrated alumina formed body formed from the halogen-containing hydrated alumina composition and an alumina shaped body, the present invention further relates to a catalyst having a hydrogenation catalytic effect using the shaped body formed from the halogen-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. The alumina can be adjusted by...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/125B01J27/132B01J31/26B01J31/34B01J32/00B01J35/10B01J20/24C10G49/04
CPCB01J20/027B01J20/08B01J20/24C10G49/04B01J27/125B01J27/132B01J31/26B01J31/34B01J35/647
Inventor 赵新强曾双亲杨清河聂红贾燕子刘涛
Owner CHINA PETROLEUM & CHEM CORP