A kind of method for preparing organic amine from synthesis gas

An organic amine and synthesis gas technology, applied in the preparation of amino compounds, organic compounds, organic chemistry, etc., can solve the problems of many side reactions, low conversion rate, and limited product types, etc., to reduce chemical wear and increase selectivity , to avoid the effect of phase transformation

Active Publication Date: 2022-07-19
SYNFUELS CHINA TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method was developed in the 1950s, and the technology is mature. The problem is that it has passed through the intermediate of fatty nitrile, and low-carbon fatty nitrile is highly toxic, which puts forward higher requirements for the process control of the production process.
The second method is to prepare various amines by using alcohol vapor and ammonia to react under the pressure of 0.8-3.5MPa by heating to 300-500°C. This process is environmentally friendly, but the disadvantage is that the conversion rate is low and there are many side reactions. , and the types of amines that can be produced depend on the carbon chain length of the alcohol in the raw material, which greatly limits the types of products

Method used

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  • A kind of method for preparing organic amine from synthesis gas

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Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0072] Weighing 10.0 kilograms of iron nuggets, 0.30 kilograms of electrolytic copper and dissolving with nitric acid to obtain a mixed nitrate solution with a concentration of 10.00wt% for subsequent use, it consists of: Fe:Cu=100:3.00 (mass ratio); 3.33 kg of 30wt% silica sol and 5.72 kg of boric acid were added to the above mixed nitrate solution, fully stirred; and the temperature was raised to 80°C; a certain amount of ammonia solution with a concentration of 5.5wt% was taken, preheated to 70°C, and in a state of stirring co-precipitate continuously at 80°C and pH 6.0; age for 5 minutes after precipitation, wash with deionized water, and filter 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);

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

Embodiment 2

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

[0079]Weighing 10.0 kilograms of iron nuggets, 0.30 kilograms of electrolytic copper and dissolving with nitric acid to obtain a mixed nitrate solution with a concentration of 10.00wt% is for subsequent use, and its composition is: Fe:Cu=100:3.00 (mass ratio); 3.33 kg of 30wt% silica sol, 4.58 kg of boric acid, and 0.92 kg of ammonium molybdate tetrahydrate were added to the above mixed nitrate solution, fully stirred; Heat to 70°C, co-precipitate continuously at 80°C and pH 6.0 under stirring; age for 5 minutes after precipitation, wash with deionized water, and filter to obtain a filter cake with a solid content of 16.5%; filter cake The content of Fe and ammonium nitrate satisfies the following relationship: Fe:NH 4 NO 3 =100:21 (mass ratio);

[0080] (2) in the filter cake prepared by step (1), add deionized water to adjust solid content to 13.5%, then add 1.79 kilograms of potassium bicarbonate, 38.0 kilograms of me...

Embodiment 3

[0085] (1) prepare iron-based catalyst filter cake;

[0086] Weighing 10.0 kilograms of iron nuggets, 0.20 kilograms of electrolytic copper and dissolving with nitric acid to obtain a mixed nitrate solution with a concentration of 10.00wt% is for subsequent use, and its composition is: Fe:Cu=100:2.00 (mass ratio); 3.33 kg of 30 wt % silica sol and 2.02 kg of ammonium metatungstate hydrate were added to the above mixed nitrate solution, fully stirred; and heated to 80 ° C; a certain amount of ammonia solution with a concentration of 5.5 wt % was taken and preheated to 70 ℃, continuous co-precipitation at 80 ℃ and pH value of 6.0 under stirring; aging for 5 minutes after precipitation, washing with deionized water, and filtration to obtain a filter cake with a solid content of 16.5%; Fe and Fe in the filter cake The content of ammonium nitrate satisfies the following relationship: Fe:NH 4 NO 3 =100:21 (mass ratio);

[0087] (2) in the filter cake prepared by step (1), add dei...

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Abstract

The invention discloses a method for preparing organic amine from synthesis gas, and belongs to the technical field of catalysts. The method includes the following steps: (1) preparing an iron-based catalyst filter cake; (2) adjusting the solid content of the iron-based catalyst filter cake, adding melamine, and beating to obtain a slurry; (3) mixing the slurry The material is spray-dried and roasted to obtain g-C 3 N 4 The iron-based catalyst precursor; (4) for the described containing g-C 3 N 4 The iron-based catalyst precursor is reduced and nitrided to obtain a catalyst; (5) the catalyst is used to catalyze the CO hydrogenation reaction, and NH is added to the raw material gas 3 , the production of organic amines. This method can effectively modulate the product selectivity of the catalyst, and the CH in the product 4 Low selectivity for low carbon hydrocarbons such as CO 2 Selectivity is low, and fatty amine selectivity is significantly increased.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a method for preparing organic amines from synthesis gas. Background technique [0002] Organic amines generally refer to organic substances produced by chemical reactions between organic substances and ammonia. Organic amines are divided into seven categories: aliphatic amines, alcohol amines, amides, alicyclic amines, aromatic amines, naphthalene amines and other amines. Among them, aliphatic amine refers to carbon chains of different lengths connecting one or more -NH 2 Like general amines, it is divided into four categories: primary amine, secondary amine, tertiary amine and polyamine, while primary, secondary and tertiary amines depend on the number of hydrogen atoms in ammonia replaced by alkyl groups. Fatty amine is an important chemical raw material with a very wide range of applications. For example, primary amines can be used as corrosion inhibitors, lubricants, mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C209/00C07C211/03B01J27/24
CPCC07C209/00B01J27/24B01J35/0066C07C211/03
Inventor 青明李玲鸽王有良王洪刘粟侥王珏白云坡任利荣杨勇李永旺
Owner SYNFUELS CHINA TECH CO LTD
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