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Preparation method for tetrapropyl ammonium bromide

A technology of tetrapropyl ammonium bromide and bromopropane, which is applied in the field of organic compound preparation, can solve the problem of low product yield and the like, and achieve the effects of improving product yield and improving economic and social benefits.

Inactive Publication Date: 2011-04-20
TIANJIN CHEM REAGENT RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the yield of the synthesized product is not high without increasing advanced equipment and increasing the technical requirements of operators

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) synthetic reaction of tetrapropylammonium bromide

[0018] Put 200 grams of tri-n-propylamine, 100 grams of bromopropane, and 600 grams of solvent butanone into a 1000-milliliter reactor equipped with a heating device, electric stirring, thermometer, and water circulation condenser, stir and heat to slow reflux, and react at a constant temperature 22-24 hours;

[0019] (2) make tetrapropyl ammonium bromide crude product

[0020] The mixture obtained after the reaction is distilled under atmospheric pressure to recover butanone and excess bromopropane, heated to 100°C, and the remaining butanone and bromopropane are removed under reduced pressure, and the obtained light yellow transparent liquid is the crude product of tetrapropylammonium bromide ;

[0021] (3) refined

[0022] Add 150 grams of ethyl acetate to the crude product of tetrapropylammonium bromide, heat to reflux and keep it warm for 0.5 hours, then cool and crystallize, filter, and decompress the prod...

Embodiment 2

[0024] (1) synthetic reaction of tetrapropylammonium bromide

[0025] Into a 1000 ml reactor with heating device, electric stirring, thermometer and water circulation condenser, put 200 grams of tri-n-propylamine, 100 grams of bromopropane, and 700 grams of solvent ethyl ketone, stir and heat to slow reflux, constant temperature reaction 22-24 hours;

[0026] (2) make tetrapropyl ammonium bromide crude product

[0027] The mixture obtained after the reaction is distilled under atmospheric pressure to recover butanone and excess bromopropane, heated to 100°C, and the remaining butanone and bromopropane are removed under reduced pressure, and the obtained light yellow transparent liquid is the crude product of tetrapropylammonium bromide ;

[0028] (3) refined

[0029] Add 150 grams of ethyl acetate to the crude product of tetrapropylammonium bromide, heat to reflux and keep it warm for 0.5 hours, then cool and crystallize, filter, and decompress the product at 50°C, keep the...

Embodiment 3

[0031] (1) synthetic reaction of tetrapropylammonium bromide

[0032] Put 200 grams of tri-n-propylamine, 100 grams of bromopropane, and 800 grams of solvent ethyl ketone into a 1000-milliliter reactor equipped with a heating device, electric stirring, thermometer, and water circulation condenser, stir and heat to slow reflux, and react at a constant temperature 22-24 hours;

[0033] (2) make tetrapropyl ammonium bromide crude product

[0034] The mixture obtained after the reaction is distilled under atmospheric pressure to recover butanone and excess bromopropane, heated to 100°C, and the remaining butanone and bromopropane are removed under reduced pressure, and the obtained light yellow transparent liquid is the crude product of tetrapropylammonium bromide ;

[0035] (3) refined

[0036] Add 150 grams of ethyl acetate to the crude product of tetrapropylammonium bromide, heat to reflux and keep it warm for 0.5 hours, then cool and crystallize, filter, and decompress the ...

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Abstract

The present invention relates to a preparation method for tetrapropyl ammonium bromide, which is characterized by (1) the synthesis reaction of tetrapropyl ammonium bromide, (2) the preparation of the crude product of tetrapropyl ammonium bromide, and (3) purification. The present invention improves the product yield, meets the needs of the market, and increases the economic benefits and the social benefits of enterprises.

Description

technical field [0001] The invention relates to the field of preparation methods of organic compounds, in particular to a preparation method of tetrapropylammonium bromide. Background technique [0002] Tetrapropylammonium bromide is a common chemical product on the market. It is an ion-pairing reagent and is used in the preparation of catalysts in the petrochemical industry. It is also an effective cationic phase transfer catalyst. At present, the yield of the synthesized product is not high without increasing the advanced equipment and increasing the technical requirements of the operators. Contents of the invention [0003] The object of the invention is to overcome the deficiencies in the prior art, and a kind of preparation method of tetrapropyl ammonium bromide is provided. [0004] In order to achieve the above object, the present invention adopts the following technical solutions: [0005] (1) synthetic reaction of tetrapropylammonium bromide [0006] Mix tri-n-...

Claims

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Application Information

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IPC IPC(8): C07C211/63C07C209/12
Inventor 徐博刚
Owner TIANJIN CHEM REAGENT RES INST
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