Reaction system and method for preparing formic acid through carbon dioxide hydrogenation

A reaction system, carbon dioxide technology, applied in catalytic reactions, chemical instruments and methods, preparation of organic compounds, etc., can solve problems such as catalyst deactivation

Inactive Publication Date: 2021-02-05
NANJING YANCHANG REACTION TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to the strong acidity of formic acid, which can react with many organometallic compounds, the catal...

Method used

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  • Reaction system and method for preparing formic acid through carbon dioxide hydrogenation
  • Reaction system and method for preparing formic acid through carbon dioxide hydrogenation

Examples

Experimental program
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Effect test

Embodiment 1

[0065] refer to figure 1 As shown, the reaction system for the production of formic acid by carbon dioxide hydrogenation provided by the embodiment of the present invention mainly includes the first reactive distillation column 10, the second reactive distillation column 110, the finishing reactor 70, the gas-liquid separation tank 20, the separation Tower 80 and purification tower 100; the side walls of the first reactive distillation tower 10 and the second reactive distillation tower 110 are successively provided with a hydrogen inlet 101, a carbon dioxide inlet 102 and a solvent and a catalyst mixing inlet 103 from top to bottom. 1. The catalyst mixing inlet 103 is arranged at the bottom of the first reactive distillation tower 10 and the second reactive distillation tower 110, so as to fill the whole first reactive distillation tower 10, the second reactive distillation tower 10, and the second reactive distillation tower with the solvent and catalyst that enter. Tower 11...

Embodiment 2-5

[0072] Other operation steps are consistent with embodiment 1, and difference is to adopt different catalysts to react, and the results are as shown in table 1:

[0073] Table 1. Reaction results using different catalysts

[0074] Example 2 3 4 5 catalyst Iron formate cobalt formate Manganese formate Nickel formate Liquid at the top of the tower (g) 2.8 4.4 1.6 2.0 Formic acid content (%) 98.5 98.3 98.8 98.9

Embodiment 6-10

[0076] Other operation steps are consistent with embodiment 1, and difference is to use different solvents to react, and the results are as shown in table 2:

[0077] Table 2. Reaction results using different solvents

[0078] Example 6 7 8 9 10 solvent n-decane Isododecane Tetradecane Isotetradecane n-hexadecane Liquid at the top of the tower (g) 3.4 3.8 3.7 3.7 3.9 Formic acid content (%) 96.6 98.7 98.6 98.6 98.9

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PUM

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Abstract

The invention provides a reaction system and a method for preparing formic acid by hydrogenating carbon dioxide. The reaction system for preparing formic acid by hydrogenating carbon dioxide comprisesa first reaction rectifying tower, a second reaction rectifying tower and a fine reactor, a hydrogen inlet, a carbon dioxide inlet and a solvent and catalyst mixing inlet are sequentially formed in the side wall of the reaction rectifying tower from top to bottom; a pneumatic micro-interface generator and a hydraulic micro-interface generator are arranged in the reaction rectifying tower, the pneumatic micro-interface generator is arranged between tower plates in the reactive distillation tower, is communicated with the hydrogen inlet and is used for dispersing and crushing incoming hydrogen,and the hydraulic micro-interface generator is arranged close to the bottom of the reaction rectifying tower, and is communicated with the carbon dioxide inlet and is used for dispersing and crushingentering carbon dioxide; and the solvent and catalyst mixing inlet is formed in the bottom of the reaction rectifying tower. The reaction system provided by the invention reduces the temperature andpressure of the hydrogenation reaction.

Description

technical field [0001] The invention relates to the field of reaction preparation of formic acid, in particular to a reaction system and method for producing formic acid by hydrogenation of carbon dioxide. Background technique [0002] Formic acid (CAS No.: 64-18-6), also known as formic acid, is the carboxylic acid with the least carbon number, has strong acidity, and is an important raw material for modern organic chemical industry. There are many methods for the synthesis of formic acid, including (1) methanol oxo synthesis method, which generates methyl formate by catalyzing the reaction of methanol and carbon monoxide with a catalyst, and then hydrolyzes to obtain formic acid and methanol; (2) formamide method, which uses a catalyst to catalyze carbon monoxide and amine in methanol solution Formamide is generated in the process, and then formamide is hydrolyzed under acidic conditions to obtain formic acid; (3) carbon dioxide method, which directly prepares formic acid ...

Claims

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Application Information

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IPC IPC(8): C07C51/00C07C51/42C07C53/02B01J31/04
CPCB01J31/04B01J2231/625C07C51/00C07C51/42C07C53/02Y02P20/10
Inventor 张志炳周政胡兴邦杨建张锋李磊孟为民王宝荣杨高东罗华勋杨国强曹宇
Owner NANJING YANCHANG REACTION TECH RES INST CO LTD
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