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Magnetic separation nanoparticle grafted NHPI catalyst, preparation method and application thereof

A nanoparticle and catalyst technology, applied in the field of catalysis, can solve problems such as affecting product quality, and achieve the effects of not easy to run off, simple and feasible preparation process, and high stability

Pending Publication Date: 2021-12-21
JIANGSU YANGNONG CHEM GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the problems existing in the prior art, the present invention provides a catalyst for magnetically separated nanoparticles grafted with NHPI and its preparation method and application, which solves the problems of catalyst separation, mechanical application, and product quality based on free radical oxidation catalysts.

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  • Magnetic separation nanoparticle grafted NHPI catalyst, preparation method and application thereof
  • Magnetic separation nanoparticle grafted NHPI catalyst, preparation method and application thereof
  • Magnetic separation nanoparticle grafted NHPI catalyst, preparation method and application thereof

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Effect test

Embodiment 1

[0126] The present embodiment provides a kind of preparation method of the catalyst of magnetic separation nanoparticle grafting NHPI, such as figure 1 Shown, described preparation method comprises the steps:

[0127] (1) 100 g of an aqueous solution of 5% octadecyltrimethylammonium bromide and a magnetic metal source are mixed, and the magnetic metal source includes CoCl with a molar ratio of 1:1 3 (10g) and CoCl 2 (7.8g), be warming up to 80 ℃, dropwise add 50g alkali concentration and be the sodium hydroxide solution of 50wt%, carry out the first reaction 2h with stirring in nitrogen atmosphere, cool down to room temperature after the first reaction, successively through filtration, filter cake through The first washing with 60 g of water was repeated three times, and the solid phase was vacuum-dried at 50° C. for 4 hours to obtain the first magnetic particles;

[0128] Mix the first magnetic particles and 6.3g of tetraethyl silicate (0.03mol), first perform ultrasonic tr...

Embodiment 2

[0136] This embodiment provides a method for preparing a catalyst for magnetically separated nanoparticles grafted with NHPI, the preparation method comprising the following steps:

[0137] (1) 50 g of an aqueous solution of 10% cetyltrimethylammonium chloride and a magnetic metal source are mixed, and the magnetic metal source includes CoCl 3 (10g) and CoCl 2 (15g), be warming up to 90 ℃, dropwise add 50g alkali concentration and be the sodium hydroxide solution of 55wt%, carry out the first reaction 4h with stirring in nitrogen atmosphere, cool down to room temperature after the first reaction, successively through filtration, filter cake through 70g The first washing with water was repeated four times, and the solid phase was vacuum-dried at 30° C. for 8 hours to obtain the first magnetic particles;

[0138] Mix the first magnetic particles and 12.48g of tetraethyl orthosilicate (0.06mol), first perform ultrasonic treatment for 15min, then slowly add 35g of ammonia water w...

Embodiment 3

[0144] This embodiment provides a method for preparing a catalyst for magnetically separated nanoparticles grafted with NHPI, the preparation method comprising the following steps:

[0145] (1) 90 g of an aqueous solution of 10% octadecyltrimethylammonium bromide and a magnetic metal source are mixed, and the magnetic metal source includes CoCl 3 (20g) and CoCl 2 (25g), be warming up to 60 ℃, dropwise add 50g alkali concentration and be the potassium hydroxide solution of 40wt%, carry out the first reaction 20h with stirring in nitrogen atmosphere, cool down to room temperature after the first reaction, successively through filtration, filter cake through 65g The first washing with water was repeated three times, and the solid phase was vacuum-dried at 30° C. for 8 hours to obtain the first magnetic particles;

[0146] Mix the first magnetic particles and 50 g of tetraethyl silicate (0.24 mol), first perform ultrasonic treatment for 30 min, then slowly add 280 g of ammonia wa...

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Abstract

The invention provides a magnetic separation nanoparticle grafted NHPI catalyst, a preparation method and application thereof. The catalyst comprises a magnetic nano core, a silicon dioxide layer coated on the surface of the magnetic nano core, and N-hydroxyphthalimide grafted with the silicon dioxide layer. According to the preparation method of the catalyst, the magnetic separation nano-particle grafted NHPI catalyst is obtained in a manner of grafting and then imidization treatment. According to the invention, the magnetic separation nanoparticle grafted NHPI catalyst has the advantages of magnetic separation and free radical type oxidation, the magnetic nano core is beneficial to promoting catalysis of NHPI on cyclohexylbenzene oxidation, and the application prospect is wide.

Description

technical field [0001] The invention relates to the technical field of catalysis, in particular to a catalyst for magnetically separated nanoparticles grafted with NHPI, a preparation method and application thereof. Background technique [0002] Phenol is an important chemical raw material with a large market demand, and is widely used in the production of important chemical products such as synthetic resins, drugs and preservatives. The traditional industrial production method of phenol is based on the oxidation of cumene to obtain cumene hydroperoxide, and then decomposes cumene hydroperoxide with acid catalyst to obtain phenol and acetone. Among the downstream products of acetone, bisphenol A is the only one that stands out. However, the production and consumption of acetone determine that its structural surplus is unavoidable. This is because for every ton of phenol produced, about 0.62 tons of acetone are co-produced; but in the process of synthesizing bisphenol A, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/02B01J35/02C07C407/00C07C409/14
CPCB01J31/0271B01J31/0254B01J31/0247C07C407/00C07C2601/14B01J2231/70B01J35/396B01J35/33B01J35/40C07C409/14Y02P20/584
Inventor 徐林黄杰军丁克鸿邓生财吕丽张子鑫薛维海陆汉茹马庆炎张寅李明
Owner JIANGSU YANGNONG CHEM GROUP
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