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Method for preparing benzoin isobutyl ether

A technology of benzoin isobutyl ether and benzoin, which is applied in the field of chemical reagents, can solve the problems of large consumption of raw material isobutanol, unfavorable economic benefits, and high production costs, and achieve the effects of easy procurement, reduction of production costs, and control of production costs

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 isobutyl ether is generally at present: take benzoin and isobutanol as reactants, and use excessive isobutanol as solvent simultaneously, this kind of preparation method has the drawback that raw material isobutanol usage is large, mainly because: 1. In the preparation method, isobutanol is used as the solvent, and the isobutanol 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 water-soluble isobutanol will be dissolved in the washing process. Partially dissolved, resulting in loss of material
Therefore the production cost of the preparation method of existing benzoin isobutyl 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 isobutyl ether, consisting of the following steps:

[0027] (1). Etherification reaction steps:

[0028] 100Kg benzoin, 160Kg isobutanol, 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 aqueous solution of 10%, stir evenly, then leave to stand for layering, and discard the water layer;

[0031] Add 1% NaCO to the mixture washed with NaCl aqueous solution 3 Aqueous solution 100Kg, stir evenly, then stand to separate and discard the water layer;

[0032] NaCO 3 Add 100Kg of clear water to the mixture after aqueous solution washing, stir evenly, then let...

Embodiment 2

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

[0037] (1). Etherification reaction:

[0038] In the 500L reactor with heating device, electric stirring, thermometer, water circulation condenser and oil-water separator, drop into 100Kg benzoin successively, 160Kg isobutanol, 180Kg toluene as solvent and as catalyst 12.5Kg sulfuric acid 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.

[0039] (2). Washing steps:

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

[0041] Add 1% NaCO to the mixture washed with NaCl aqueous solution 3 Aqueous solution 100Kg, stir evenly, then stand to sep...

Embodiment 3

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

[0047] (1). Etherification reaction:

[0048] In the 500L reactor with heating device, electric stirring, thermometer, water circulation condenser and oil-water separator, drop into 100Kg benzoin successively, 160Kg isobutanol, 200Kg toluene as solvent and as catalyst 12.5Kg sulfuric acid 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.

[0049] (2). Washing steps:

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

[0051] Add 1% NaCO to the mixture washed with NaCl aqueous solution 3 Aqueous solution 100Kg, stir evenly, then stand to sep...

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Abstract

The invention relates to a method for preparing benzoin isobutyl ether, comprising the following steps of: etherification reaction, water scrubbing and reducing pressure for desolventizing. In the etherification reaction step of the method for preparing benzoin isobutyl ether, methylbenzene of a solvent is adopted to replace part of isobutanol, so that the production efficiency can also be increased while the production cost is reduced. The invention can realize the price reduction of benzoin isobutyl ether, and enables the product to be popularized and applied in a larger range in the market, thereby increasing the market competitiveness of manufacturers.

Description

technical field [0001] The invention belongs to the field of chemical reagents, in particular to a preparation method of benzoin isobutyl ether. Background technique [0002] Benzoin isobutyl ether has been widely used as an important UV curing initiator. The preparation method of benzoin isobutyl ether is generally at present: take benzoin and isobutanol as reactants, and use excessive isobutanol as solvent simultaneously, this kind of preparation method has the drawback that raw material isobutanol usage is large, mainly because: 1. In the preparation method, isobutanol is used as the solvent, and the isobutanol 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 water-soluble isobutanol will be dissolved in the washing process. Partially dissolved, resulting in loss of material. Therefore the production cost of the preparation method of existing benzoin isobutyl ...

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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