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Formic acid micro-interface preparation system and method thereof

A preparation system and interface technology, which is applied in the field of formic acid micro-interface preparation system, 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

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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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  • Formic acid micro-interface preparation system and method thereof

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Experimental program
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Effect test

Embodiment 1

[0058] refer to figure 1 As shown, the micro-interface preparation system for formic acid provided by the embodiment of the present invention mainly includes a reactive distillation tower 10, a fine reactor 70, a gas-liquid separation tank 20, and a separation tower 80; the side wall of the reactive distillation tower 10 is composed of A hydrogen inlet 101, a carbon dioxide inlet 102, and a solvent and a catalyst mixing inlet 103 are sequentially arranged from top to bottom, and the solvent and a catalyst mixing inlet 103 are arranged at the bottom of the reactive distillation tower 10 to fill the incoming solvent and catalyst Throughout the reactive distillation column 10, the top of the reactive distillation column 10 is provided with a formic acid outlet 105 for the discharge of the product formic acid, and the formic acid coming out from the formic acid outlet 105 subsequently enters the gas-liquid separation tank 20 for further processing. Purification, the hydrogen that ...

Embodiment 2-5

[0064] 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:

[0065] Table 1. Reaction results using different catalysts

[0066] 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

[0068] 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:

[0069] Table 2. Reaction results using different solvents

[0070] 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 formic acid micro-interface preparation system and a method thereof, the formic acid micro-interface preparation system comprises a reactive distillation column, the side wallof the reactive distillation column is sequentially provided with a hydrogen inlet, a carbon dioxide inlet and a solvent and catalyst mixing inlet from top to bottom; wherein a pneumatic micro-interface generator and a hydraulic micro-interface generator are arranged in the reactive distillation tower, and the pneumatic micro-interface generator is arranged between tower plates in the reactive distillation tower, is communicated with a hydrogen inlet and is used for dispersing and crushing incoming hydrogen; the hydraulic micro-interface generator is arranged close to the bottom of the reactive distillation tower, is communicated with the carbon dioxide inlet and is used for dispersing and crushing the carbon dioxide entering the reactive distillation tower. The formic acid micro-interface preparation system solves the problems of low reaction rate and low mass transfer rate between reaction phase interfaces in the prior art, reduces the temperature and pressure of the hydrogenation reaction, and improves the reaction efficiency.

Description

technical field [0001] The invention relates to the field of formic acid preparation, in particular to a micro-interface preparation system and method for 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 directly prepares formic acid by catalytic carbon dioxide hydrogenat...

Claims

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Application Information

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IPC IPC(8): C07C51/00C07C53/02C07C51/42B01J31/04
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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