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A kind of catalyst for preparing isooctanoic acid by oxidation of isooctylaldehyde and preparation method thereof, and method for preparing isooctanoic acid

A technology of isooctaldehyde catalysis and catalyst, which is applied in the direction of physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, chemical instruments and methods, etc. Separation and other issues

Active Publication Date: 2021-05-14
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage is that the catalyst containing N element has a high boiling point, and the post-treatment is more complicated, and the requirements for the reaction equipment are relatively high.
[0009] In summary, in the existing technology for preparing isooctanoic acid from isooctylaldehyde, or its homogeneous catalyst is difficult to separate and handle (such as Mn(OAc) 2 or KOAc or Cu(OAc) 2 etc.), or the catalyst preparation process is cumbersome and highly corrosive, or the process is complicated, the mass transfer effect is poor, and the product selectivity is not ideal.
[0010] It is necessary to provide a catalyst for catalytic oxidation of isooctylaldehyde to produce isooctanoic acid, which is easy to separate, has high product selectivity, and can overcome the difficult separation of catalysts in homogeneous catalysis in the current technology, so as to realize recycling

Method used

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  • A kind of catalyst for preparing isooctanoic acid by oxidation of isooctylaldehyde and preparation method thereof, and method for preparing isooctanoic acid
  • A kind of catalyst for preparing isooctanoic acid by oxidation of isooctylaldehyde and preparation method thereof, and method for preparing isooctanoic acid
  • A kind of catalyst for preparing isooctanoic acid by oxidation of isooctylaldehyde and preparation method thereof, and method for preparing isooctanoic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] 5,10,15,20-(tetracarboxymethyl phenyl)porphyrin (2g, 2.4mmol) and ferrous chloride tetrahydrate (2.38g, 12mmol) were dissolved in 60mL DMF solution, and after reflux for 12h, vacuum DMF was distilled off under reduced pressure. After cooling to room temperature, pour 60 mL of deionized water into the round bottom flask, stir for 40 min at room temperature, then filter with suction, wash with water three times, and obtain R after drying. 3 Iron porphyrin IV of =-COOMe.

Embodiment 2

[0056] Referring to the method of Example 1, 5,10,15,20-(tetranitrophenyl)porphyrin (1.59g, 2mmol) was reacted with ferrous chloride tetrahydrate (1.99g, 10mmol) to prepare R 3 =-NO 2 The iron porphyrin compound IV.

Embodiment 3

[0058] 5,10,15,20-(tetracarboxymethylphenyl)porphyrin (2g, 2.4mmol) and hydrazine hydrate N 2 h 4 ·H 2 O150mL was dissolved in 200mL DMF, heated to reflux for 10h, cooled to room temperature, and then 300mL deionized water was added. Stir at room temperature for 1 h, then filter with suction, wash with water three times, and dry to obtain a purple solid powder, which is R 3 =-CONHNH 2 Compound III. Will R 3 =-CONHNH 2 Compound III (1.7g, 2mmol) and ferrous chloride tetrahydrate (2.78g, 14mmol) were dissolved in 50mL of DMF, and refluxed for 12h. After the reaction was completed, the DMF was distilled off under reduced pressure, washed with water three times, and the organic phase was washed with anhydrous sulfuric acid. Magnesium was dried and distilled under reduced pressure to obtain R 3 =-CONHNH 2 The iron porphyrin compound IV.

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Abstract

The invention discloses a catalyst for preparing isooctanoic acid by oxidizing isooctyl aldehyde, a preparation method thereof, and a method for preparing isooctanoic acid. The catalyst used is a porphyrin biomimetic catalyst with an enzyme-simulating function, which makes the preparation process clean and effective; at the same time, the catalyst is loaded on a magnetic nanostructure, and its high specific surface area is conducive to improving the substrate mass transfer process. This catalyst has both the green catalytic performance of imitating biological enzymes and the characteristics of easy separation, recovery and recycling of magnetic materials. When it is used to oxidize isooctyl aldehyde to prepare isooctanoic acid, the conversion rate of raw material and product selectivity are obviously improved.

Description

technical field [0001] The invention relates to a catalyst for preparing isooctanoic acid by oxidation of isooctylaldehyde and a preparation method thereof, and a method for preparing isooctanoic acid by oxidation of isooctylaldehyde. [0002] technical background [0003] 2-Ethylhexanoic Acid (2-EHA), also known as isooctanoic acid in Chinese, is an oily liquid slightly soluble in cold water and ethanol, soluble in hot water and ether. It is characterized by high purity and light color. It can react with a variety of metal compounds to form isooctanoic acid metal salts. Its main uses are as follows: drier for paint, auxiliary agent for lubricating oil, plasticizer for plastics, stabilizer for PVC, pharmaceutical salt-forming agent, and auxiliary agent for reaction catalysts. [0004] At present, my country has become the world's second largest paint producer next to the United States, especially the rapid development of high-grade paint. In addition, my country's synthetic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/28C07C53/126C07C51/235
CPCB01J31/28B01J2231/70C07C51/235C07C53/126
Inventor 王泽圣丛鑫曹善健何光文刘超董科王鹏崔乾余炎冰
Owner WANHUA CHEM GRP CO LTD
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