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Catalyst for preparing canthaxanthin from beta-carotene and preparation method and application thereof

A carotene and catalyst technology, which is applied in catalytic reactions, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of catalyst stability difference, low reaction yield, generation of halogen-containing wastewater, etc., and achieves mild reaction conditions, The preparation process is simple and the route is environmentally friendly.

Active Publication Date: 2021-07-16
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalyst cannot be recycled and used mechanically, which increases the preparation cost
[0011] In summary, in the existing disclosed technology of oxidizing β-carotene to prepare canthaxanthin, there are still problems such as low reaction yield, poor catalyst stability, difficulty in recycling, generation of halogen-containing wastewater, and unfriendly environment.

Method used

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  • Catalyst for preparing canthaxanthin from beta-carotene and preparation method and application thereof
  • Catalyst for preparing canthaxanthin from beta-carotene and preparation method and application thereof
  • Catalyst for preparing canthaxanthin from beta-carotene and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Preparation of catalyst a:

[0071] Catalyst carrier preparation: Take 60 g of melamine and 10 g of triphenylphosphine in a mortar, grind and mix for 30 minutes. The mixed powder was transferred into a crucible and calcined at 550°C for 5h with a heating rate of 3°C / min. After cooling down, the solid was taken out, and ground to a solid particle size of 500 mesh to obtain the carrier phosphorus-doped graphite phase carbon nitride (P-g-C 3 N 4 ), the phosphorus content is 1.0%.

[0072] Preparation of tetrapyridyl porphyrin copper: Take equimolar tetrapyridyl porphyrin (referred to as L-1) and copper acetate in a three-necked flask, add N,N-dimethylformaldehyde 6 times the weight of L-1 ligand Amide, heated to reflux for 2h. Cool, filter with suction, wash the filter cake with absolute ethanol, and dry.

[0073] Weigh 7.8g tetrapyridyl porphyrin copper and 50g carrier P-g-C 3 N 4 Grind in an agate mortar for 30 minutes, transfer to a beaker and add 200g N,N-dimeth...

Embodiment 2

[0076] Preparation of catalyst b:

[0077] Catalyst carrier preparation: Take 60 g of melamine and 30 g of triphenylphosphine oxide in a mortar, grind and mix for 30 minutes. The mixed powder was transferred into a crucible and calcined at 450°C for 9h with a heating rate of 1.5°C / min. After cooling down, the solid was taken out, and ground to a solid particle size of 300 mesh to obtain the carrier phosphorus-doped graphite phase carbon nitride (P-g-C 3 N 4 ), the phosphorus content is 2.5%.

[0078] Preparation of copper tetraphenylporphyrin: Take tetraphenylporphyrin (referred to as L-2) and copper chloride in a three-necked flask at a molar ratio of 0.6:1, add N that is 4 times the weight of L-2 ligand, N-dimethylformamide was heated to reflux for 5h. Cool, filter with suction, wash the filter cake with absolute ethanol, and dry.

[0079] Weigh 12.9g tetraphenylporphyrin copper and 50g carrier P-g-C 3 N 4 Grind in an agate mortar for 30 minutes, transfer to a beaker ...

Embodiment 3

[0082] Preparation of catalyst c:

[0083] Catalyst carrier preparation: Take 60 g of melamine and 8 g of ammonium phosphate in a mortar, grind and mix for 30 minutes. The mixed powder was transferred into a crucible and calcined at 650°C for 3h with a heating rate of 4°C / min. After cooling down, the solid was taken out and ground to a solid particle size of 600 mesh to obtain the carrier phosphorus-doped graphite phase carbon nitride (P-g-C 3 N 4 ), the phosphorus content is 0.8%.

[0084] Preparation of tetrakis(4-hydroxyphenyl)porphyrin copper: Take tetrakis(4-hydroxyphenyl)porphyrin (referred to as L-3) and copper sulfate in a three-necked flask at a molar ratio of 1.3:1, add L- 3. N,N-dimethylformamide with 8 times the weight of the ligand was heated to reflux for 3 hours. Cool, filter with suction, wash the filter cake with absolute ethanol, and dry.

[0085] Weigh 6.2g tetrakis(4-hydroxyphenyl)porphyrin copper and 50g carrier P-g-C 3 N 4 Grind in an agate mortar ...

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Abstract

The invention discloses a catalyst for preparing canthaxanthin from beta-carotene and a preparation method and application thereof. The catalyst is a phosphorus-doped graphite-phase carbon nitride loaded metalloporphyrin complex, and has the advantages that the catalytic activity is high, the combination between active components and a carrier is firmer, the active components are not easy to lose, the stability is good, and the like. The method for preparing canthaxanthin by carrying out oxidation reaction on beta-carotene and hydrogen peroxide in the presence of the catalyst, a cocatalyst and a solvent has the advantages of mild reaction process, high all-trans product selectivity, high product yield and small environmental pollution, and the catalyst can be recycled.

Description

technical field [0001] The invention belongs to the technical field of canthaxanthin preparation, and relates to a catalyst for preparing canthaxanthin from beta-carotene and a preparation method thereof, and a specific method for preparing canthaxanthin by catalytic oxidation of beta-carotene with the catalyst. Background technique [0002] Canthaxanthin (or canthaxanthin) is a carotenoid found in certain mushrooms, crustaceans, fish, algae, eggs, blood and liver. The activity of canthaxanthin to quench active oxygen and the ability to scavenge free radicals are twice that of β-carotene and fifty times that of vitamin E, so it is widely used in aquaculture, feed additives, food colorants and pharmaceutical industries. In 1984, FDA / WHO approved cantharidin as a food additive and established quality standards. [0003] For a long time, there have been many known methods of oxidizing β-carotene to prepare canthaxanthin, which can be represented by the following reaction formu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22B01J27/24C07C403/24
CPCB01J31/184B01J27/24C07C403/24C07C2601/16B01J2231/70B01J2531/16B01J2531/26B01J2531/72B01J2531/842B01J2531/025Y02P20/584
Inventor 张弈宇潘亚男张涛宋军伟沈宏强刘英瑞吕英东朱龙龙李莉郭劲资王嘉辉黎源
Owner WANHUA CHEM GRP CO LTD
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