Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Alumina shaped body, preparation method and application thereof, catalyst, preparation method and hydrotreating method

A molding and alumina technology, applied in the direction of metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, catalyst carriers, etc., can solve problems such as transfer difficulties, molding interference, and secondary dust pollution. To achieve the effect of simple process, avoid dust pollution, and improve the working environment

Active Publication Date: 2020-06-16
CHINA PETROLEUM & CHEM CORP +1
View PDF6 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Alumina shaped body, preparation method and application thereof, catalyst, preparation method and hydrotreating method
  • Alumina shaped body, preparation method and application thereof, catalyst, preparation method and hydrotreating method
  • Alumina shaped body, preparation method and application thereof, catalyst, preparation method and hydrotreating method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0051] 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 boron-containing hydrated alumina composition to obtain a molded body;

[0052] Optionally, (2) drying the molded product obtained in step (1) to obtain a dried molded product;

[0053] (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.

[0054] In step (1), the boron-containing hydrated alumina composition contains hydrated alumina, a compound having at least two proton acceptor sites, and a boron-containing compound.

[0055] 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 hydrated alumina m...

Embodiment 1

[0198] 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%. 2 o 3 The calculated boron content is 5% by weight.

[0199] (1) Put 200g of wet filter cake numbered SLB-1 in a beaker, then add 5g of methylcellulose (purchased from Zhejiang Haishen Chemical Co., Ltd., the same below) and 3g of scallop powder (galactomannan The 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...

Embodiment 2

[0205] The aluminum oxide molded body was prepared by the same method as that in Example 1, except that the step (1) did not use turnip powder, and the amount of hydroxyethyl methylcellulose was 7.4 g. The property parameters of the prepared alumina shaped bodies are listed in Table 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
pore sizeaaaaaaaaaa
pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses an alumina formed body, and a preparation method and an application thereof. The preparation method comprises the following steps: optionally drying a formed body of a boron-containing hydrated alumina composition having a phi value being 1.8-5 and containing hydrated alumina and a compound having at least two proton acceptor sites, and calcining the dried formed body in anoxygen-containing atmosphere in the presence of water steam. The invention also discloses a catalyst having a hydrogenation catalysis effect and using the alumina formed body as a carrier, a preparation method thereof, and a hydrotreatment method. The formed body having a high strength is prepared from hydrated alumina wet gel, so the step for drying the hydrated alumina wet gel is omitted, extrawater introduced for processing dry glue powder into a formable material is avoided during the preparation of a formed raw material, the total process flow is simplified, the total operating energy consumption is reduced, dust pollution initiated by pseudo-boehmite dry glue powder used as a raw material is avoided, and the working environment is improved.

Description

technical field [0001] The present invention relates to the technical field of alumina molding. Specifically, the present invention relates to an alumina molding and its preparation method and application. The present invention also relates to a catalyst using the alumina molding as a carrier and its preparation method. The present invention further relates to 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 pseud...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/04B01J23/00B01J23/882B01J23/883B01J32/00B01J35/10C10G45/04C10G45/08B01J20/08B01J20/28B01J20/30
CPCB01J20/08B01J20/28014B01J21/04B01J23/002B01J23/882B01J23/883B01J35/10B01J2523/00C10G45/04C10G45/08C10G2300/70B01J2523/305B01J2523/31B01J2523/68B01J2523/845B01J2523/847
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products