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Catalyst for preparing higher alcohols from synthesis gas and preparation method thereof

A catalyst, iron-based catalyst technology, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problems of high price, difficult large-scale industrial application, limited Rh reserves, etc., and achieve good stability, Easy to control, single active phase structure effect

Active Publication Date: 2020-11-10
SYNFUELS CHINA INNER MONGOLIA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reserves of Rh in the earth's crust are limited, and its high price determines its difficulty in large-scale industrial application.

Method used

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  • Catalyst for preparing higher alcohols from synthesis gas and preparation method thereof
  • Catalyst for preparing higher alcohols from synthesis gas and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] (1) prepare iron-based catalyst filter cake;

[0065] Take by weighing 10.0 kilograms of iron nuggets, 0.30 kilograms of electrolytic copper and make concentration be the mixed nitrate solution of 10.00wt% with nitric acid dissolution for subsequent use, it is composed of: Fe:Cu=100:3.00 (mass ratio); Add 3.33 kilograms of 30wt% silica sol and 5.72 kilograms of boric acid into the above-mentioned mixed nitrate solution, fully stir; Continuous co-precipitation at 80°C and a pH value of 6.0; aging for 5 minutes after precipitation, washing with deionized water, and filtering to obtain a filter cake with a solid content of 16.5%; the content of Fe and ammonium nitrate in the filter cake meets The following relationship: Fe: NH 4 NO 3 =100:21 (mass ratio);

[0066] (2) add deionized water to the filter cake prepared in step (1) to adjust the solid content to 13.5%, then add 1.79 kilograms of potassium bicarbonate, 38.0 kilograms of melamine, so that the mass ratio of iro...

Embodiment 2

[0071] (1) prepare iron-based catalyst filter cake;

[0072] Take by weighing 10.0 kilograms of iron nuggets, 0.30 kilograms of electrolytic copper and make concentration be the mixed nitrate solution of 10.00wt% with nitric acid dissolution for subsequent use, it is composed of: Fe:Cu=100:3.00 (mass ratio); 3.33 kilograms of 30wt% colloidal silica, 2.86 kilograms of boric acid, and 1.84 kilograms of ammonium molybdate tetrahydrate are added in the above-mentioned mixed nitrate solution, fully stirred; and the temperature is raised to 80° C.; Heating to 70°C, continuous co-precipitation at 80°C and pH value of 6.0 under stirring; aging for 5 minutes after precipitation, washing with deionized water, and filtering to obtain a filter cake with a solid content rate of 16.5%; filter cake The content of Fe and ammonium nitrate satisfies the following relationship: Fe:NH4 NO 3 =100:21 (mass ratio);

[0073] (2) add deionized water to the filter cake prepared in step (1) to adjust ...

Embodiment 3

[0078] (1) prepare iron-based catalyst filter cake;

[0079] Take by weighing 10.0 kilograms of iron nuggets, 0.30 kilograms of electrolytic copper and make concentration be the mixed nitrate solution of 10.00wt% with nitric acid dissolution for subsequent use, it is composed of: Fe:Cu=100:3.00 (mass ratio); Add 3.33 kg of 30wt% silica sol, 1.10 kg of ammonium molybdate tetrahydrate, and 1.07 kg of ammonium metatungstate hydrate to the above mixed nitrate solution, stir well; and heat up to 80°C; take a certain concentration of 5.5wt% Aqueous ammonia solution, preheated to 70°C, continuous co-precipitation at 80°C and pH value of 6.0 under stirring; aged for 5 minutes after precipitation, washed with deionized water, and filtered to obtain a solid content of 16.5%. Filter cake; the content of Fe and ammonium nitrate in the filter cake satisfies the following relationship: Fe: NH 4 NO 3 =100:21 (mass ratio);

[0080] (2) add deionized water to the filter cake prepared in ste...

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Abstract

The invention discloses a catalyst for preparing higher alcohols from synthesis gas and a preparation method of the catalyst, and belongs to the technical field of catalysts. The preparation method ofthe catalyst provided by the invention comprises the following steps: (1) preparing an iron-based catalyst filter cake; (2) adjusting the solid content of the iron-based catalyst filter cake, addingmelamine, and pulping to obtain slurry; (3) subjecting the slurry to spray drying and roasting so as to obtain an iron-based catalyst precursor containing g-C3N4; and (4) carrying out reduction and nitridation treatment on the iron-based catalyst precursor containing g-C3N4 to obtain the catalyst. The active phase of the catalyst is iron nitride, the structure of the active phase is relatively single and easy to control, and the iron nitride has the characteristics of CO molecular adsorption and dissociated adsorption at the same time, and synthesis gas can be efficiently catalyzed and converted into higher alcohols.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a catalyst for preparing higher-carbon alcohols from synthesis gas and a preparation method thereof. Background technique [0002] Higher alcohols generally refer to alcohols with more than 2 carbon atoms (C 2 + OH), is an important fuel additive. At the same time, high-carbon alcohol is also a high value-added chemical, which is widely used in the synthesis of detergents, cosmetics, plasticizers, and the preparation of pharmaceutical intermediates. At present, the international mainstream high-carbon alcohol preparation method is "high-carbon olefin hydroformylation method". The raw materials and process technology used in this method are monopolized by foreign countries, and it cannot be widely applied in China. Domestic enterprises generally adopt the oil hydrogenation method to produce high-carbon alcohols. Since the raw materials used in the oil hydrogenation method can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C07C29/156C07C31/02
CPCB01J27/24C07C29/156C07C31/02
Inventor 青明王缠和孟劭聪王洪刘粟侥王有良王珏冯景丽杨勇李永旺
Owner SYNFUELS CHINA INNER MONGOLIA CO LTD
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