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Formic acid preparation system and method

A preparation system, formic acid technology, applied in carboxylate preparation, organic compound preparation, chemical instruments and methods, etc., can solve problems such as catalyst deactivation

Inactive Publication Date: 2021-03-12
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 catalysts reported by existing methods are not stable under formic acid conditions, which makes the catalyst deactivate rapidly.

Method used

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  • Formic acid preparation system and method

Examples

Experimental program
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Effect test

Embodiment 1

[0056] refer to figure 1 As shown, the formic acid preparation system provided by the embodiment of the present invention mainly includes a reactive distillation tower 10 and a gas-liquid separation tank 20; the side wall of the reactive distillation tower 10 is sequentially provided with a hydrogen inlet 101, a carbon dioxide Inlet 102 and solvent, catalyzer mixing inlet 103, solvent, catalyzer mixing inlet 103 are arranged at the tower bottom of described reactive distillation column 10, are used for the solvent that enters, catalyzer is filled with whole described reactive distillation column 10, and reaction refining The top of the distillation tower 10 is provided with a formic acid outlet 105 for the discharge of the product formic acid, the formic acid coming out from the formic acid outlet 105 subsequently enters the gas-liquid separation tank 20 for further purification, and the hydrogen coming in from the hydrogen inlet 101 is stored in In the hydrogen storage tank 4...

Embodiment 2-5

[0062] 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:

[0063] Table 1. Reaction results using different catalysts

[0064] Example 2 3 4 5 catalyst Iron formate cobalt formate Manganese formate Nickel formate Liquid at the top of the tower (g) 2.7 4.3 1.5 1.9 Formic acid content (%) 98.6 98.1 98.7 98.7

Embodiment 6-10

[0066] 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:

[0067] Table 2. Reaction results using different solvents

[0068] Example 6 7 8 9 10 solvent n-decane Isododecane Tetradecane Isotetradecane n-hexadecane Liquid at the top of the tower (g) 3.3 3.7 3.6 3.6 3.8 Formic acid content (%) 96.5 98.2 98.5 98.5 98.7

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Abstract

The invention provides a formic acid preparation system and method. The formic acid preparation system comprises a reactive distillation column, and a hydrogen inlet, a carbon dioxide inlet and a solvent and catalyst mixed inlet are sequentially formed in the side wall of the reactive distillation column from top to bottom; a plurality of micro-interface generators are arranged in the reactive distillation column, the micro-interface generators are arranged among a plurality of tower plates in the reactive distillation column, and one of the micro-interface generators is communicated with a hydrogen inlet and is used for dispersing and crushing incoming hydrogen; another micro-interface generator is communicated with a carbon dioxide inlet and is used for dispersing and crushing entering carbon dioxide, and the rest micro-interface generators are communicated with the hydrogen inlet or the carbon dioxide inlet. The formic acid preparation system solves the problems of low reaction rateand low mass transfer rate between reaction phase interfaces in the prior art, lowers the temperature and pressure of the hydrogenation reaction, and enhances the reaction efficiency.

Description

technical field [0001] The invention relates to the field of formic acid preparation, in particular to a formic acid preparation system and method. 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 by catalytic carbon dioxide hydrogenation with a catalyst....

Claims

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Application Information

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IPC IPC(8): C07C51/00C07C51/42C07C51/44C07C53/02B01J31/04
CPCB01J31/04B01J2231/625C07C51/00C07C51/42C07C51/44C07C53/02Y02P20/10
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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