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Method for preparing boron trifluoride through reacting fluosulfonic acid with boric acid

A technology of boron trifluoride and fluorosulfonic acid, which is applied in the direction of boron halide compounds, etc., can solve the problem of low production cost, and achieve the effects of low production cost, stable quality, and good use of cooling and heat

Inactive Publication Date: 2012-06-27
TIANJIN TAIHENG GASES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0026]The problem to be solved by the present invention is to overcome the deficiencies in the prior art. This method replaces expensive boron with cheap fluorosulfuric acid on the basis of the fluorite boric anhydride method. Anhydrides (B 2 O 3 ), less expensive to produce

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  • Method for preparing boron trifluoride through reacting fluosulfonic acid with boric acid
  • Method for preparing boron trifluoride through reacting fluosulfonic acid with boric acid

Examples

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Embodiment 1

[0054] A method for preparing boron trifluoride by the reaction of fluorosulfonic acid and boric acid, which is to mix fluorosulfonic acid and boric acid and react to prepare boron trifluoride at a pressure of 0.2 MPA and a temperature of 87°C; wherein the boric acid and fluorosulfonic acid The weight fraction ratio is 1:2. The flow process described therein: adopt integrated continuous feeding, solid boric acid feeding tank 1 enters dissolving tank 21 and dissolving tank 22 through a feeder, and the boric acid after heating and melting in the dissolving tank passes into boric acid pump 41 and enters reactor 5, at this time The fluorosulfonic acid feeding tank 3 in the fluorosulfonic acid storage tank is also driven into the reactor 5 through the acid pump 42, and reacts at a pressure of 0.2MPA and a temperature of 87°C. The heat is provided by steam, and the reaction generates boron trifluoride gas through heat exchange. After the device 6 is cooled, it enters the collecting...

Embodiment 2

[0056] A method for preparing boron trifluoride by reacting fluorosulfonic acid with boric acid is characterized in that: it mixes fluorosulfonic acid and boric acid, and reacts to prepare boron trifluoride at a pressure of 0.4 MPA and a temperature of 93°C; wherein boric acid and boric acid The weight fraction ratio of fluorosulfonic acid is 1: 4, see figure 1 .

Embodiment 3

[0058] A method for preparing boron trifluoride by the reaction of fluorosulfonic acid and boric acid, which is to mix fluorosulfonic acid and boric acid and react to prepare boron trifluoride at a pressure of 0.2 MPA and a temperature of 87°C; wherein the boric acid and fluorosulfonic acid The weight fraction ratio is 1:2;

[0059] The flow process described therein: adopt integrated continuous feeding, solid boric acid feeding tank 1 enters dissolving tank 21 and dissolving tank 22 through a feeder, and the boric acid after heating and melting in the dissolving tank passes into boric acid pump 41 and enters reactor 5, at this time The fluorosulfonic acid feeding tank 3 in the fluorosulfonic acid storage tank is also driven into the reactor 5 through the acid pump 42, and reacts at a pressure of 0.2MPA and a temperature of 87°C. The heat is provided by steam, and the reaction generates boron trifluoride gas through heat exchange. After the device 6 is cooled, it enters the...

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Abstract

The invention discloses a method for preparing boron trifluoride through reacting fluosulfonic acid with boric acid. The preparation method is characterized in that boron trifluoride is prepared by mixing fluosulfonic acid with boric acid and reacting according to a pressure of 0.2-0.4MPa and a temperature of 87-93DEG C, wherein the weight ratio of boric acid to fluosulfonic acid is 1:2-4. The preparation method of the invention, which has the advantages of reasonable process and simple preparation, is a simplest and ideal technology for preparing boron trifluoride.

Description

technical field [0001] The invention relates to a chemical product, in particular to a technology for preparing boron trifluoride from the reaction of fluorosulfonic acid and boric acid, which is suitable for large-scale production of boron trifluoride. Background technique [0002] Boron trifluoride is an important catalyst widely used in organic synthesis and petrochemical industry. It is used in many organic chemical reactions such as alkylation, polymerization, isomerization, addition, condensation and decomposition. The reason why it has such a wide range of application fields in catalytic reactions is that the boron electron layer structure has a strong tendency to form complexes, which is very important to produce catalytically active structures in the action of acidic catalysts. In many reactions, boron trifluoride-based catalysts are more active than metal halides of organic acids without causing undesired side reactions. As a catalyst, BF 3 It can be used in v...

Claims

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Application Information

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IPC IPC(8): C01B35/06
Inventor 李中元
Owner TIANJIN TAIHENG GASES
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