Method for preparation of organic amine from syngas

An organic amine and synthesis gas technology, which is applied in the preparation of amino compounds, the preparation of organic compounds, and organic chemistry, etc., can solve the problems of low conversion rate, limited product types, and many side reactions.

Active Publication Date: 2020-10-30
SYNFUELS CHINA TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Method for preparation of organic amine from syngas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[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); 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);

[0073] (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

[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); 3.33 kilograms of 30wt% colloidal silica, 4.58 kilograms of boric acid, and 0.92 kilograms of ammonium molybdate tetrahydrate are added in the above-mentioned mixed nitrate solution, fully stirred; 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:NH 4 NO 3 =100:21 (mass ratio);

[0080] (2) add deionized water to the filter cake prepared in step (1) to adjust the solid content to 13.5%, then add 1.7...

Embodiment 3

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

[0086] Take by weighing 10.0 kilograms of iron nuggets, 0.20 kilograms of electrolytic copper and make concentration be the mixed nitrate solution of 10.00wt% with nitric acid dissolution for subsequent use, and it is composed of: Fe:Cu=100:2.00 (mass ratio); Add 3.33 kg of 30wt% silica sol and 2.02 kg of ammonium metatungstate hydrate to the above mixed nitrate solution, stir thoroughly; and raise the temperature to 80°C; take a certain amount of ammonia solution with a concentration of 5.5wt%, and preheat it 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 filtering to obtain a filter cake with a solid content rate of 16.5%; Fe and The content of ammonium nitrate satisfies the following relationship: Fe:NH 4 NO 3 =100:21 (mass ratio);

[0087] (2) add deionized water to the filter cake prepared in step (1) to adju...

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Abstract

The invention discloses a method for preparation of organic amine from syngas, and belongs to the technical field of catalysts. The method comprises the following steps of: (1) preparing an iron-basedcatalyst filter cake; (2) adjusting the solid content of the iron-based catalyst filter cake, adding melamine, and performing pulping to obtain a slurry; (3) subjecting the slurry to spray drying androasting so as to obtain an iron-based catalyst precursor containing g-C3N4; (4) carrying out reduction and nitridation treatment on the iron-based catalyst precursor containing g-C3N4 to obtain thecatalyst; and (5) catalyzing CO hydrogenation reaction by using the catalyst, and adding NH3 into the raw material gas to produce organic amine. According to the method, the product selectivity of thecatalyst can be effectively modulated, the selectivity of low-carbon hydrocarbons like CH4 in the product is low, the CO2 selectivity is low, and the aliphatic amine selectivity is remarkably improved.

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: fatty amines, alcohol amines, amides, alicyclic amines, aromatic amines, naphthalene amines and other amines. Among them, aliphatic amine refers to carbon chains of different lengths connected with one or more -NH 2 Like general amines, it can be divided into four categories: primary amine, secondary amine, tertiary amine and polyamine. The primary, secondary and tertiary amines depend on the number of hydrogen atoms in ammonia replaced by alkyl groups. Aliphatic amine is an important chemical raw material with a very wide range of applications. For example, primary amines can be used as corrosion inhibitors, lubrican...

Claims

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Application Information

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Patent Type & Authority Applications(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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