Preparation method for benzyl alcohol

A technology of benzyl alcohol and benzaldehyde, which is applied in the field of preparation of benzyl alcohol, can solve the problems of large investment, high requirements for production equipment, and unsafety, and achieve the effect of simple process and avoiding the use of hydrogen and pressurized equipment

Inactive Publication Date: 2019-01-11
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, benzaldehyde is used as a substrate, hydrogen is used as a hydrogen source, and metal nanocatalysts are used for catalytic hydrogenation to produce benzyl alcohol. Insecurity

Method used

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  • Preparation method for benzyl alcohol
  • Preparation method for benzyl alcohol
  • Preparation method for benzyl alcohol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation of zirconium hydroxyethylidene diphosphonate (ZrHEDP): sodium hydroxyethylidene diphosphonate and ZrOCl 2 ·8H 2 O was dissolved in deionized water to form a solution, and the ZrOCl 2 ·8H 2 The fresh aqueous solution prepared in O was added dropwise to the sodium hydroxyethylidene diphosphonate solution, and the mixture was continuously stirred at room temperature for 8 to 10 hours. The resulting white precipitate was separated by centrifugation and washed with deionized water to remove Na + and Cl － , and then washed with absolute ethanol, repeated washing with water and alcohol twice, and dried at 80°C for 8 to 12 hours to obtain the zirconium hydroxyethylidene diphosphonate catalyst, in which sodium hydroxyethylidene diphosphonate and ZrOCl 2 ·8H 2 The feed molar ratio of O is 1:2.

Embodiment 2

[0029] Preparation of Zirconium Aminotrimethylene Phosphonate (ZrATMP): Sodium Aminotrimethylene Phosphonate and ZrOCl 2 were dissolved in deionized water to form a solution, and the ZrOCl 2 The prepared fresh aqueous solution was added dropwise to the sodium aminotrimethylene phosphonate solution, and the mixture was continuously stirred at room temperature for 8-10 hours. The white precipitate was separated by centrifugation and washed with deionized water to remove Na + and Cl － , and then washed with absolute ethanol, repeated washing with water and alcohol for 3 times, and dried at 80°C for 8 to 12 hours to obtain the zirconium aminotrimethylene phosphonate catalyst, in which sodium aminotrimethylene phosphonate and ZrOCl 2 The feeding molar ratio is 1:3.

Embodiment 3

[0031] The preparation of zirconium ethylenediamine tetramethylene phosphonate (ZrEDTMPs): replace sodium hydroxyethylidene diphosphonate in Example 1 with sodium ethylenediamine tetramethylene phosphonate, wherein ethylenediamine tetramethylene phosphonate Sodium Oxide and ZrOCl 2 ·8H 2 The feeding molar ratio of O is 1:4.

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PUM

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Abstract

The invention discloses a preparation method for benzyl alcohol. The preparation method is characterized by comprising the following steps: taking benzaldehyde as a substrate; taking organic zirconiumphosphonate or inorganic zirconium pyrophosphate as a catalyst; taking isopropyl alcohol or tertiary butanol as a solvent and a hydrogen source; fully reacting while stirring at 120-140 DEG C; filtering and separating the catalyst; acquiring a filtrate, namely, a reaction product. The mass ratio of catalyst to benzaldehyde is at (0.9:1)-(1.9:1); the yield of benzyl alcohol is as high as 94.3%; the yield of benzyl alcohol is still as high as 93.3% after the catalyst is reused for 5 times.

Description

technical field [0001] The present invention specifically relates to a kind of preparation method of benzyl alcohol. Background technique [0002] Benzyl alcohol is an important organic chemical product and intermediate, which is widely used in chemical production and has extremely important application value. Benzyl alcohol is an extremely useful fixative, an indispensable fragrance for the blending of jasmine, moonshine, ylang-ylang, etc., and can be used to make soap and daily-use essence. Benzyl alcohol is also widely used in industrial production, such as paint solvent, photographic developer, polyvinyl chloride stabilizer, local anesthetic, drug tranquilizer and drug synthesis, synthetic resin solvent, epoxy resin thinner, etc. [0003] Benzyl alcohol has the functions of sterilizing, relieving pain and relieving itching. It is a kind of disinfectant and antiseptic in medicine, and sometimes it is also used as a local anesthetic. Benzyl alcohol injection is usually u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/14C07C33/20B01J31/24
CPCB01J31/2495B01J2231/643C07C29/14C07C33/20Y02P20/584
Inventor 王海军王健佳王瑞英
Owner JIANGNAN UNIV
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