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Catalyst as well as preparation method and application thereof

A catalyst and binder technology, applied in the field of syngas to low-carbon alcohol, can solve the problems of catalyst CO conversion rate and total alcohol selectivity, etc., to improve physical strength and stability, inhibit enrichment, and increase yield Effect

Inactive Publication Date: 2017-02-22
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The main purpose of the present invention is to provide a catalyst, its preparation method and application, to solve the problem of low CO conversion rate and total alcohol selectivity of the catalyst in the process of producing low-carbon alcohol from syngas

Method used

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  • Catalyst as well as preparation method and application thereof

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preparation example Construction

[0028] In order to achieve the above object, the present invention also provides a preparation method of the above-mentioned catalyst, the preparation method comprising: carrying out a precipitation reaction on a mixture of copper-containing soluble salt, iron-containing soluble salt and manganese-containing soluble salt and a precipitating agent, and after filtering, to obtain A filter cake; and a slurry formed by mixing the filter cake with water, and mixing the slurry with a binder, drying and roasting to obtain a catalyst; wherein the binder is selected from silica sol and silicon-containing soluble salts.

[0029] Due to Fe 3 o 4 is the active phase of the water-gas shift, leading to CO 2 In this catalyst, the ratio of copper and iron is limited to a specific ratio range, so that the two can more synergistically generate alcohol, and there is no excess iron to generate ferric oxide, which inhibits CO to a certain extent 2 production, while increasing the yield of total ...

Embodiment 1

[0044] Weigh 362.4g Cu (NO 3 ) 2 ·3H 2 O, 424.2gFe(NO 3 ) 3 9H 2 O hydrate, 42.95g50%Mn(NO 3 ) 2 Aqueous solution, add 500mL deionized water and mix well; precipitant is potassium carbonate solution, precipitation reaction is carried out at a precipitation temperature of 70°C and a pH of 7.2, and aging is carried out at 60°C for 4 hours after the reaction is completed; the precipitate is fully filtered and washed, Until the conductivity of the washing liquid is detected to be below 100 μm / cm; the obtained filter cake is beaten again, and the temperature of the slurry is controlled at 70°C, and 252.08 g of commercially available silica sol with a concentration of 25% is added dropwise to it until it is evenly stirred. Slurry spray-drying was carried out, and the average particle diameter D50 of the obtained catalyst was 56 μm, and then the catalyst was calcined at 400° C. for 8 hours to obtain finished catalyst particles. The catalyst wear rate results are shown in Table...

Embodiment 2

[0047] Weigh 362.4g Cu (NO 3 ) 2 ·3H 2 O, 121.2gFe(NO 3 ) 3 9H 2 O hydrate, 10.74g50%Mn(NO 3 ) 2For the aqueous solution, add 500mL deionized water and mix well; the precipitation agent is sodium carbonate solution, and the precipitation reaction is carried out at a precipitation temperature of 70°C and a pH of 7.2. After the reaction is completed, aging is carried out at 60°C for 4 hours; Until the conductivity of the washing liquid is detected to be below 100 μm / cm; the obtained filter cake is beaten again, and the temperature of the slurry is controlled at 70°C, and 252.08 g of commercially available silica sol with a concentration of 25% is added dropwise to it until it is evenly stirred. Slurry spray-drying was carried out, and the average particle diameter D50 of the obtained catalyst was 48 μm, and then the catalyst was calcined at 400° C. for 8 hours to obtain finished catalyst particles. The catalyst wear rate results are shown in Table 1.

[0048] The catalyt...

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Abstract

The invention provides a catalyst as well as a preparation method and application thereof. The catalyst contains an active component and silicon dioxide, wherein the composition of the active component is shown by a general formula (I): CuaFebMncOd; a, b, c and d represent the atomic mole numbers of elements Cu, Fe, Mn and O respectively; a is 1, b is 0.2-3, c is 0.02-2, and d is determined by the number of oxygen in the oxides of elements Cu, Fe and Mn; and the silicon dioxide accounts for 1-30% of total weight of the catalyst. The catalyst provided by the invention has the advantages of low reaction temperature and pressure, low selectivity on carbon dioxide, high selectivity on total alcohol, high wear resistance, long service life and the like.

Description

technical field [0001] The invention relates to the field of synthesis gas to produce low-carbon alcohols, in particular to a catalyst, its preparation method and application. Background technique [0002] Low carbon mixed alcohol (C 1 ~C 6 Due to its high octane number, it can be used as a clean gasoline additive to replace carcinogenic dimethyl tert-butyl ether (MTBE), and can also be used as an excellent clean vehicle fuel and oil substitute , and it has huge economic value as a chemical itself or as a raw material for bulk chemical production. Therefore, in the context of the increasingly tight supply of fossil crude oil in my country and the continuous downturn in the methanol alternative fuel market, coal is used as the source to develop alternative methanol fuels and to produce mixed alcohols (especially C 2 The above higher alcohols) have extremely high economic benefits and important strategic significance. [0003] Synthetic mixed alcohol catalysts mainly inclu...

Claims

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Application Information

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IPC IPC(8): B01J23/889C07C29/156C07C31/04C07C31/08C07C31/10C07C31/12
CPCY02P20/52B01J23/8892B01J23/002B01J2523/00C07C29/156C07C31/04C07C31/08C07C31/10C07C31/12B01J2523/17B01J2523/41B01J2523/72B01J2523/842
Inventor 李导舒歌平李克健王洪学张一成
Owner CHNA ENERGY INVESTMENT CORP LTD
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