A kind of catalyst and the method for using the catalyst to prepare β-phenylethanol

A technology of catalyst and phenylethyl alcohol, which is applied in the direction of chemical instruments and methods, physical/chemical process catalysts, hydrolysis preparation, etc., can solve problems such as poor catalyst structure and performance, reduced catalyst life, and difficult product separation, so as to simplify product separation Process flow, reducing gas-liquid ratio, and reducing the effect of circulating hydrogen

Active Publication Date: 2022-01-07
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The β-phenylethanol preparation processes proposed by patents CN1111169A, US6979753, US4943667, US2524096, etc. all require the use of solvents, which reduces production efficiency, complicates the product separation process, and increases the cost of solvent removal, etc.
[0006] To sum up, the existing technologies all have certain deficiencies to varying degrees. If additives need to be added to improve selectivity, but at the same time cause problems such as reduced catalyst life, difficult product separation, and even affect product quality; such as catalyst structure and Poor performance, which leads to easy deactivation of the catalyst and short catalyst life; if a solvent is required due to the heat transfer limitation of the reactor, the separation cost is increased

Method used

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  • A kind of catalyst and the method for using the catalyst to prepare β-phenylethanol
  • A kind of catalyst and the method for using the catalyst to prepare β-phenylethanol

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0046] Add 54ml of ammonia water (concentration 25wt%) into 150ml deionized water, then add a volume of 48ml tetraethyl orthosilicate absolute ethanol solution (concentration 50wt%), and stir for 4h at 35°C to obtain a silica microsphere solution. The silica microsphere solution was centrifugally filtered, washed with ethanol and deionized water 3 times respectively to obtain silica microspheres (6.3g), and the gained silica microspheres were dispersed in deionized water for subsequent use (solid content 9.5wt%) ).

[0047] Add 14.52g of copper nitrate, 104.4g of nickel nitrate and 78ml of ammonia water (concentration 25wt%) into 1200ml of deionized water, add dropwise a volume of 360ml of silicon dioxide microsphere aqueous solution (9.5wt% of solid content) under stirring, at 45°C Stir under the conditions for 2.5h, then cultivate at 150°C for 3h, then centrifugally filter, wash with deionized water until the pH of the lotion is 7, and vacuum-dry the filtered product at 0.05...

Embodiment 2

[0050] Add 90ml of ammonia water (concentration: 25wt%) into 210ml of deionized water, then add a volume of 72ml of methyl orthosilicate absolute ethanol solution (concentration: 55wt%), and stir for 1 hour at 55°C to obtain a silicon dioxide microsphere solution. The silica microsphere solution was centrifugally filtered, and washed three times with ethanol and deionized water respectively to obtain 10.4 g of silica microspheres, which were dispersed in deionized water for subsequent use (solid content: 12 wt %).

[0051] 30.99g of copper acetate, 202.1g of nickel acetate and 60ml of ammonia water (concentration 25wt%) were added to 900ml of deionized water, and a volume of 270ml of silica microsphere aqueous solution (solid content 12wt%) was added dropwise under stirring. Stir at 120°C for 2h, then culture at 120°C for 36h, then centrifugally filter, wash with deionized water until pH = 7, and vacuum-dry the filtered product at 1KpaA and 75°C for 8h, then at 550°C in air atm...

Embodiment 3

[0054] Add 30ml of ammonia water (concentration 28wt%) into 90ml deionized water, then add a volume of 36ml orthosilicate methyl orthosilicate absolute ethanol solution (concentration 45wt%), stir at 45°C for 3h to obtain a silica microsphere solution, and The silica microsphere solution was centrifugally filtered, and washed three times with ethanol and deionized water respectively to obtain 4.3 g of silica microspheres, which were dispersed in deionized water for subsequent use (solid content 8.2 wt %).

[0055] 14.87g copper chloride, 123.4g nickel chloride and 90ml ammoniacal liquor (concentration 28wt%) are added in 1800ml deionized water, the silica microsphere aqueous solution (solid content 12wt%) of volume 480ml is added dropwise under stirring state, at 25 Stir at ℃ for 3 hours, then incubate at 135℃ for 18h, then centrifuge and filter, wash with deionized water until pH=7 of the lotion, and vacuum-dry the filtered product at 2KpaA and 90℃ for 4h, then at 350℃, Calci...

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Abstract

The invention discloses a catalyst and a method for preparing β-phenethyl alcohol with the catalyst. The catalyst is nickel silicate-copper composite sea urchin-shaped nano-reactor type catalyst. The catalyst solves the problem that the hydrogenation reaction of styrene oxide is too fast and the hydrogen supply is insufficient, resulting in a high content of by-product ethylbenzene, and can make styrene oxide hydrogenate under mild conditions with high selectivity and high yield to produce β-benzene Ethanol, styrene oxide conversion rate > 99%, β-phenylethanol selectivity ≥ 99.5%, sufficient hydrogen supply, so that the hydrogenation of styrene oxide can also ensure high selectivity of the product under the condition of no additives, reducing desorption The auxiliary process simplifies the product separation process. The preparation method of β-phenylethanol can realize the continuous production of β-phenylethanol and greatly improve the production efficiency.

Description

technical field [0001] The invention relates to a catalyst for preparing β-phenylethanol by hydrogenating styrene oxide, in particular to a nickel silicate-copper composite sea urchin-shaped nano-reactor catalyst, and a method for preparing β-phenylethanol using the catalyst. Background technique [0002] β-Phenylethyl alcohol (PEA), also known as 2-phenylethyl alcohol, phenylethyl alcohol, ethyl phenylethyl alcohol, is a simple aromatic primary alcohol, a colorless liquid at room temperature, with an elegant, delicate and long-lasting aroma of roses , was first discovered as a characteristic aroma compound in plant flowers, and naturally exists in aromatic oils such as neroli oil, rose oil, and geranium oil. [0003] β-Phenylethyl alcohol is widely used in various food flavors and tobacco flavors because of its soft, pleasant and long-lasting rose aroma. It is the main raw material for preparing rose-flavored food additives and rose-flavored flavors. β-Phenethyl alcohol is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755C07C29/10C07C33/22B01J35/02
Inventor 曾伟王明永王磊黎源杨恒东赵欣王展宋延方杨洋陈永
Owner WANHUA CHEM GRP CO LTD
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