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Method for synthesizing acetic acid by methanol, carbon dioxide and hydrogen gas

A catalyst and iodide technology, applied in the field of synthesizing acetic acid, can solve the problems such as expensive raw material of methyl iodide, low activity and selectivity, high toxicity and the like

Active Publication Date: 2017-08-04
INST OF CHEM CHINESE ACAD OF SCI
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

With iodomethane, carbon dioxide and hydrogen as raw materials can produce acetic acid, but activity and selectivity are all low, wherein acetic acid 10.7%, carbon monoxide 58.4%, methane 30.9% (Fukuoka, A.etal.Chem.Lett.567-568( 1995)), in addition, the raw material of methyl iodide is expensive and highly toxic

Method used

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  • Method for synthesizing acetic acid by methanol, carbon dioxide and hydrogen gas
  • Method for synthesizing acetic acid by methanol, carbon dioxide and hydrogen gas
  • Method for synthesizing acetic acid by methanol, carbon dioxide and hydrogen gas

Examples

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Embodiment 1

[0041] Embodiment 1, catalytic methanol, carbon dioxide and hydrogen synthesis acetic acid:

[0042]The ruthenium complex and the rhodium complex catalyst, organic ligand, iodide promoter, methanol and solvent are added to a stainless steel reactor (magnetic sub with built-in electromagnetic stirring) with a volume of 16mL, and the reaction The still is sealed and replaced twice with 1MPa carbon dioxide gas. At room temperature, carbon dioxide and hydrogen are respectively charged into the reaction kettle, and the reaction kettle is placed in a heating furnace at a constant temperature, and the electromagnetic stirrer is set to 800 rpm. points, react. After the reaction, the reactor was placed in an ice-water bath, and the gas was released after cooling. Wherein, liquid products and gas products were analyzed by gas chromatography.

[0043] Concrete reaction conditions are as follows: ruthenium complex catalyst 20mmol / L, rhodium complex catalyst 20mmol / L (the amount of ruthe...

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Abstract

The invention discloses a method for synthesizing acetic acid. The method comprises the following steps: putting ethanol, carbon dioxide and hydrogen gas into a reaction kettle and reacting in the presence of ruthenium complex and rhodium complex catalysts, an organic ligand, an iodide cocatalyst and a solvent, so as to obtain the acetic acid. The invention reports a reaction route for the first time and a homogeneous phase catalysis system is innovatively utilized to realize the reaction in a high-activity and high-selectivity manner under a relatively mild condition. The catalysts are easy to circularly utilize and have extremely great industrialization development value. The method disclosed by the invention has important significance on recycling of the carbon dioxide and alleviation of environment problems caused by the carbon dioxide.

Description

technical field [0001] The invention belongs to the field of chemistry and chemical engineering, and in particular relates to a method for synthesizing acetic acid. Background technique [0002] Acetic acid is an important bulk chemical, and its current main production route is the methanol carbonylation process based on fossil resources (Maitlis, P.M. et al. J. Chem. Soc., Dalton Trans. 2187-2196 (1996)). Carbon dioxide is one of the main greenhouse gases, which has caused serious environmental problems on a global scale. Converting carbon dioxide into high value-added chemicals is crucial to the sustainable development of human society (Aresta, M. Carbon Dioxide as Chemical Feedstock, (Wiley–VCH, Weinheim, 2010)). In the field of carboxylic acid synthesis using carbon dioxide as a raw material, the main progress has focused on the production of formic acid or its derivatives by hydrogenation of carbon dioxide (Leitner, W. Angew. Chem. Int. Ed. 34, 2207-2221 (1995); Jessop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26C07C51/15C07C53/08
CPCC07C51/15B01J31/26B01J35/19C07C53/08
Inventor 钱庆利韩布兴张静静崔萌
Owner INST OF CHEM CHINESE ACAD OF SCI
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