System and method for preparing isononanoic acid and method for preparing metal organic skeletal catalyst

Abstract

The invention provides a system and method for preparing isononanoic acid and a method for preparing a metal organic skeletal catalyst. The system includes an oxidation reactor used for oxidizing isononylaldehyde to isononanoic acid; a cooler used for cooling a part of material flow that flows out of the oxidation reactor; a metal ion separator used for separating excessive metal ions from the material flow that flows out of the cooler; a peroxide decomposition reactor used for decomposing a peroxide in the other part of the material flow that flows out of the oxidation reactor; and a rectification apparatus used for separating the material flow that flows out of the peroxide decomposition reactor to obtain the isononanoic acid product, wherein the material outlet of the metal ion separator is connected to the material inlet of the oxidation reactor. The invention further provides an isononanoic acid preparation method that is good in selectivity and safety and high in yield.

Description

technical field [0001] The invention relates to a system and method for preparing isononanoic acid and a method for preparing a metal-organic framework catalyst, belonging to the technical field of chemical raw material preparation. Background technique [0002] Isononanoic acid (3,5,5-trimethylhexanoic acid), its structure is as follows: [0003] [0004] It has a wide range of uses and can be used as raw materials for synthetic lubricants, pharmaceutical intermediates, metal soaps and metal processing fluids. It is also suitable for modification of alkyd resins, which can improve yellowing resistance and impact resistance. It can also be used to produce various Isononanoate can be used in the field of cosmetics, and its metal salt can be used for different purposes such as paint drier, vinyl stabilizer, polyvinyl chloride stabilizer and preservative, tire adhesion aid, etc. [0005] Aldehyde oxidation to prepare isononanoic acid is the main production process at presen...

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Problems solved by technology

[0012] In summary, in the prior art of preparing corresponding carboxylic acids by oxidation of aldehydes, metal ion catalysts are generally added to the oxidation reactor to speed up the reaction and accelerate the decomposition of peroxides, but this will lead to a decrease in selectivity and an increase in by-products. The product yield is low, and the metal ions are not easy to separate

In the prior art, there is no report on heterogeneous catalysts for decomposing peroxides in the process of aldehyde oxidation to acid production, and the safety problems caused by the local accumulation of peroxides in the rectification process have not been solved in the prior art

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