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Method for preparing benzoin isobutyl ether

A technology of benzoin and benzoin, which is applied in the field of preparation of benzoin butyl ether, can solve the problems of large use of n-butanol as a raw material, unfavorable economic benefits, and high production costs, so as to improve market competitiveness, reduce production costs, and control production cost effect

Inactive Publication Date: 2010-05-26
TIANJIN CHEM REAGENT RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method of benzoin butyl ether is generally at present: take benzoin and n-butanol as reactant, and use excessive n-butanol as solvent simultaneously, this kind of preparation method has the drawback that raw material n-butanol usage is big, mainly because: 1 .N-butanol is used as a solvent in the preparation method, and n-butanol that does not participate in the reaction needs to be reclaimed after the reactant is generated; 2. The preparation method also includes a washing step, and the n-butanol that can be dissolved in water will partly Dissolution, resulting in loss of material
Therefore the production cost of the preparation method of existing benzoin butyl ether is too high, is unfavorable for the raising of enterprise economic benefit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A preparation method of benzoin butyl ether, consisting of the following steps:

[0027] (1). Etherification reaction steps:

[0028] 100Kg benzoin, 160Kg n-butanol, 150Kg toluene as solvent and 12.5Kg sulfuric acid as catalyst and 15Kg anhydrous Aluminum trichloride, heated to boiling with stirring, kept in a boiling reflux state, continuously separated water from the oil-water separator, until no water was produced, stopped heating, and the reaction was terminated.

[0029] (2). Washing steps:

[0030] To the mixture obtained after the reaction in step (1), adding concentration is 100Kg of NaCl solution of 10%, stir evenly, then leave to stand for layering, and discard the water layer;

[0031] Add 1% NaCO to the NaCl solution washed mixture 3 Solution 100Kg, stir evenly, then let stand to separate layers, discard the water layer;

[0032] NaCO 3 Add 100Kg of clear water to the mixture after solution washing, stir evenly, then let stand to separate layers, and di...

Embodiment 2

[0036] A kind of preparation method of benzoin butyl ether comprises the following steps:

[0037] (1). Etherification reaction:

[0038] In a 500L reactor with heating device, electric stirring, thermometer, water circulation condenser and oil-water separator, drop into 100Kg benzoin successively, 160Kg n-butanol, 180Kg toluene as solvent and 12.5Kg sulfuric acid and 15Kg as catalyst For anhydrous aluminum trichloride, heat to boiling with stirring, keep boiling and reflux, continuously separate water from the oil-water separator, until no water is produced, stop heating, and the reaction is terminated.

[0039] (2). Washing steps:

[0040] To the mixture obtained after the reaction in step (1), adding concentration is 100Kg of NaCl solution of 10%, stir evenly, then leave to stand for layering, and discard the water layer;

[0041] Add 1% NaCO to the NaCl solution washed mixture 3 Solution 100Kg, stir evenly, then let stand to separate layers, discard the water layer;

...

Embodiment 3

[0046] A kind of preparation method of benzoin butyl ether comprises the following steps:

[0047] (1). Etherification reaction:

[0048] In a 500L reaction kettle with heating device, electric stirring, thermometer, water circulation condenser and oil-water separator, drop into 100Kg benzoin successively, 160Kg n-butanol, 200Kg toluene as solvent and 12.5Kg sulfuric acid as catalyst and 15Kg For anhydrous aluminum trichloride, heat to boiling with stirring, keep boiling and reflux, continuously separate water from the oil-water separator, until no water is produced, stop heating, and the reaction is terminated.

[0049] (2). Washing steps:

[0050] To the mixture obtained after the reaction in step (1), adding concentration is 100Kg of NaCl solution of 10%, stir evenly, then leave to stand for layering, and discard the water layer;

[0051] Add 1% NaCO to the NaCl solution washed mixture 3 Solution 100Kg, stir evenly, then let stand to separate layers, discard the water la...

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Abstract

The invention relates to a method for preparing benzoin isobutyl ether, which comprises the following steps of carrying out etherification reaction, washing with water and removing a solvent by decompression. The etherification reaction step of the method for preparing benzoin isobutyl ether readopts the solvent methylbenzene to replace part of n-butyl alcohol, and the production efficiency can be effectively improved when the production cost is reduced; accordingly, the price reduction of a benzoin isobutyl ether finished product can be realized, and the product can be popularized and applied in a larger range in the market, thereby improving the market competitive capacity of production enterprises.

Description

technical field [0001] The invention belongs to the field of chemical reagents, in particular to a preparation method of benzoin butyl ether. Background technique [0002] Benzoin butyl ether (molecular formula: C 18 h 20 o 2 ) has been widely used as an important UV curing initiator. The preparation method of benzoin butyl ether is generally at present: take benzoin, n-butanol as reactant, and use excessive n-butanol as solvent simultaneously, this kind of preparation method has the drawback that raw material n-butanol usage is big, mainly because: 1 .N-butanol is used as a solvent in the preparation method, and n-butanol that does not participate in the reaction needs to be reclaimed after the reactants are generated; 2. The preparation method also includes a washing step, and the n-butanol that can be dissolved in water will partly Dissolution, resulting in loss of material. Therefore the production cost of the existing preparation method of benzoin butyl ether is to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C49/84C07C45/61
Inventor 徐博刚
Owner TIANJIN CHEM REAGENT RES INST
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