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A kind of preparation method of catalyst for producing low-carbon alcohol from synthesis gas

A technology of catalysts and low-carbon alcohols, which is applied in the direction of catalyst activation/preparation, preparation of organic compounds, chemical instruments and methods, etc. It can solve the problems of large mass transfer and heat transfer, large difference in pressure drop of catalyst bed, and difficulty in controlling pore structure. Large and other problems, to achieve the effect of adjustable morphology and structure, which is conducive to stability and avoids hot spots

Active Publication Date: 2022-07-05
榆林市云化绿能有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As can be seen from the above, the carrier of the catalyst is SiO 2 , ZrO 2 、TiO 2 , CeO 2 、Al 2 o 3 , Y-ZrO 2 、Ce x Ti 1-x o 2 、Ce x Zr 1-x o 2 , that is, non-metallic inorganic materials, and according to the specification, the catalyst of this patent is in a powder state, which causes the catalyst to face the following technical problems: (1) It is troublesome to assemble and unload; (2) It is not easy to shape and its mechanical strength cannot meet the requirements; (3) The mass transfer and heat transfer are greatly hindered, which reduces the processing efficiency; (4) The difference in pressure drop between the front and back of the catalyst bed is large, which increases energy consumption, that is, the choice of catalyst carrier needs to be improved urgently
The main preparation methods include template method, hydrothermal method, foaming method, sol-gel method and molten salt method, etc., because the method of chemical synthesis is usually involved in the synthesis process, the preparation steps are numerous and the process is relatively complicated, which leads to the current The synthesis cost of some hierarchical porous materials is high, the control of the pore structure is difficult, the process stability is poor, and it is difficult to carry out large-scale production

Method used

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  • A kind of preparation method of catalyst for producing low-carbon alcohol from synthesis gas

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Embodiment 1

[0045] A kind of preparation method of catalyst for preparing low-carbon alcohol from synthesis gas, the catalyst is LaCo 0.7 Ga 0.3 O 3 Non-powder catalyst, comprising the following steps:

[0046] (1) Preparation of Ni-Al alloy bulk:

[0047] (a) Physically and uniformly mix 30wt.% 2-3μm nickel powder and 70wt.% 7-8μm aluminum powder;

[0048] (b) 300Mpa compression molding;

[0049] (c) High temperature sintering in an inert atmosphere, the sintering temperature is 1300 o C, high temperature duration 1h, natural cooling,

[0050] The holding pressure time of compression molding is 5min; the inert atmosphere is N 2 ; The programmed temperature rise rate of the high temperature sintering is 10 o C / min.

[0051] (2) Preliminary de-alloying by chemical lye corrosion: The corrosive solution used for preliminary de-alloying by chemical lye corrosion is 1M NaOH aqueous solution, the corrosion time is 12h, and the temperature is 30 o C, assist ultrasonic to remove air bubb...

Embodiment 2

[0057] A kind of preparation method of catalyst for preparing low-carbon alcohol from synthesis gas, the catalyst is LaCo 0.65 Ga 0.35 O 3 Non-powder catalyst, comprising the following steps:

[0058] (1) Preparation of Ni-Al alloy bulk:

[0059] (a) Physically and uniformly mix 35wt.% 2-3μm nickel powder and 65wt.% 7-8μm aluminum powder;

[0060] (b) 350Mpa compression molding;

[0061] (c) High temperature sintering under reducing atmosphere, sintering temperature 1350 o C, high temperature duration 2h, natural cooling,

[0062] The pressure holding time of pressing is 7.5min; the reducing atmosphere is H 2 ; The programmed temperature rise rate of the high temperature sintering is 10 o C / min.

[0063] (2) Preliminary de-alloying by chemical lye corrosion: The corrosive solution used for preliminary de-alloying by chemical lye corrosion is 1.5M NaOH aqueous solution, the corrosion time is 20h, and the temperature is 33 o C, assist ultrasonic to remove air bubbles duri...

Embodiment 3

[0069] A kind of preparation method of catalyst for preparing low-carbon alcohol from synthesis gas, the catalyst is LaCo 0.55 Ga 0.45 O 3 Non-powder catalyst, comprising the following steps:

[0070] (1) Preparation of Ni-Al alloy bulk:

[0071] (a) Physically and uniformly mix 40wt.% 2-3μm nickel powder and 60wt.% 7-8μm aluminum powder;

[0072] (b) 400Mpa compression molding;

[0073] (c) High temperature sintering in an inert atmosphere, the sintering temperature is 1400 o C, high temperature duration 3h, natural cooling,

[0074] The holding pressure time of compression molding is 10min; the inert atmosphere is N 2 ; The programmed temperature rise rate of the high temperature sintering is 10 o C / min.

[0075] (2) Preliminary de-alloying by chemical lye corrosion: The corrosive solution used for preliminary de-alloying by chemical lye corrosion is 2M NaOH aqueous solution, the corrosion time is 24h, and the temperature is 35 o C, assist ultrasonic to remove air b...

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Abstract

The invention provides a preparation method of a catalyst for producing lower alcohol from synthesis gas. The catalyst is a monolithic three-dimensional porous structure catalyst. Compared with the powder catalyst, the catalyst has excellent mechanical strength and heat transfer performance. High and low local hot spots, effectively improve the characteristics of solid-phase mass transfer process, and have high selectivity, high activity and stability for low-carbon alcohols.

Description

technical field [0001] The invention relates to a preparation method of a catalyst for preparing low-carbon alcohol from synthesis gas, belonging to the field of electrochemical dealloying to prepare porous materials, in particular to perovskite catalytic hydrogenation to prepare low-carbon mixed alcohol. [0002] technical background [0003] First, low-carbon alcohols, which refer to alcohols containing two or more carbon atoms, have attracted much attention due to their wide application in the chemical and polymer industries, such as raw materials and intermediates for the synthesis of specific commercial products, and as a An excellent gasoline additive that can increase the octane number of gasoline. Currently, they are mainly obtained by grain / sugar fermentation (such as ethanol and isobutanol) or hydration of petroleum-derived olefins (such as heavy alcohols). If low-carbon alcohols can be directly prepared from syngas (CO+H2), it can save food and make full use of my...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83B01J35/10B01J37/00B01J37/34B01J37/14B01J37/02B01J37/08B01J37/18C07C29/156C07C31/02
CPCB01J23/83B01J23/002B01J37/0009B01J37/348B01J37/14B01J37/0207B01J37/08B01J37/18C07C29/156B01J2523/00B01J35/30B01J35/657B01J35/613B01J2523/32B01J2523/3706B01J2523/845C07C31/02Y02P20/52
Inventor 左海珍
Owner 榆林市云化绿能有限公司