Enhanced micro-interface reaction system and method for preparing formic acid by hydrogenating carbon dioxide

A carbon dioxide, interfacial reaction technology, used in catalytic reactions, chemical instruments and methods, separation/purification of carboxylic acid compounds, etc., can solve problems such as catalyst deactivation

Pending Publication Date: 2021-02-26
NANJING YANCHANG REACTION TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, due to the strong acidity of formic acid, which can react with many organometallic compounds, the catalysts reported by existing methods are not stable under formic acid conditions, which makes the catalyst deactivate rapidly.

Method used

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  • Enhanced micro-interface reaction system and method for preparing formic acid by hydrogenating carbon dioxide
  • Enhanced micro-interface reaction system and method for preparing formic acid by hydrogenating carbon dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] refer to figure 1 As shown, the enhanced micro-interface reaction system for carbon dioxide hydrogenation to formic acid provided by the embodiment of the present invention mainly includes the first reactive distillation tower 10, the second reactive distillation tower 110, the finishing reactor 70, and the gas-liquid separation tank 20. The separation tower 80 and the purification tower 100; the side walls of the first reactive distillation tower 10 and the second reactive distillation tower 110 are sequentially provided with a hydrogen inlet 101, a carbon dioxide inlet 102, and a solvent and catalyst mixing inlet 103 from top to bottom , the solvent, the catalyst mixing inlet 103 are arranged at the bottom of the first reactive distillation column 10, the second reactive distillation column 110, so as to be used to fill the whole first reactive distillation column 10, the second reaction distillation column 10, the second reaction distillation column with the solvent t...

Embodiment 2-5

[0079] 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:

[0080] Table 1. Reaction results using different catalysts

[0081] 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

[0083] 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:

[0084] Table 2. Reaction results using different solvents

[0085] 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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Abstract

The invention provides a reinforced micro-interface reaction system and method for preparing formic acid through carbon dioxide hydrogenation. The reinforced micro-interface reaction system for preparing formic acid through carbon dioxide hydrogenation comprises a first reactive distillation column, a second reactive distillation column and a fine reactor, wherein the first reactive distillation column and the second reactive distillation column are connected in parallel; a hydrogen inlet, a carbon dioxide inlet and a solvent and catalyst mixing inlet are sequentially formed in the side wallsof the first reactive distillation tower and the second reactive distillation tower from top to bottom; a flow-separating micro-interface generator is arranged in each of the first reaction rectifyingtower, the second reaction rectifying tower and the fine reactor, wherein the flow-separating micro-interface generator is formed by arranging a plurality of flow-separating channels on a micro-interface generator body; and the hydrogen inlet and the carbon dioxide inlet are connected with any of the flow-separating micro-interface generator arranged in the first reaction rectifying tower and thesecond reaction rectifying tower. According to the enhanced micro-interface reaction system, the temperature and pressure of hydrogenation reaction are reduced.

Description

technical field [0001] The invention relates to the field of reaction preparation of formic acid, in particular to an enhanced micro-interface reaction system and method for hydrogenation of carbon dioxide to produce formic acid. 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 direct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D3/00C07C51/00C07C51/44C07C53/02B01J31/04
CPCB01D3/009C07C51/00C07C51/44B01J31/04B01J2231/625C07C53/02Y02P20/10
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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