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Method for preparing boron trifluoride used as catalyst

A boron trifluoride and catalyst technology, applied in the direction of boron halide compounds, etc., can solve the problems of cumbersome process and proportion error affecting the bonding quality, etc., achieve good use of cold and heat, solve the problem of unstable production, and low production cost Effect

Inactive Publication Date: 2012-07-04
TIANJIN TAIHENG GASES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Proportion error during operation affects the bonding quality, and the process is cumbersome

Method used

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  • Method for preparing boron trifluoride used as catalyst
  • Method for preparing boron trifluoride used as catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Grind 300 grams of sodium fluoroboride and 50 grams of anhydrous boric anhydride together, and then put the mixture in a flask; add 300 milliliters of concentrated sulfuric acid, shake the flask to fully mix the solid and liquid, and reduce the temperature at 130 ° C. It is produced by removing excess boron trifluoride under pressure. See the process for details figure 1 .

Embodiment 2

[0054] Grind 350 grams of sodium fluoroboride and 60 grams of anhydrous boric anhydride together, and then put the mixture in a flask; add 500 milliliters of concentrated sulfuric acid, shake the flask to fully mix the solid and liquid, and reduce the temperature at 130 ° C. It is produced by removing excess boron trifluoride under pressure. See the process for details figure 1 .

Embodiment 3

[0056] Sodium fluoroborate (350 g addition) and anhydrous boric anhydride (60 g addition) were ground together and the mixture was placed in a flask. Add about 300 ml of concentrated sulfuric acid, shake the flask to fully mix the solid and liquid, use a grease on the standard conical interface B (saturated with boron trifluoride 1:4 paraffin and vaseline mixture, And it is made under reduced pressure at 130°C to remove excess boron trifluoride) Connect the flask A to the device, open the piston D, and evacuate the system to vacuum; then close the piston D to make the boron trifluoride produced Through washing bottle E, the concentrated sulfuric acid saturated with boric anhydride is housed in the washing bottle E, to wash away hydrofluoric acid and moisture. The flask was heated slightly. Foaming occurred and when the foaming ceased, the reaction mixture was heated vigorously. Boron trifluoride is condensed in several ampoules F, and the outside of one ampoule is soaked w...

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Abstract

The invention discloses a method for preparing boron trifluoride used as the catalyst, which is characterized by comprising the following steps: grinding 300-350g of sodium fluoroborate and 50-60g of anhydrous boron anhydride together, putting a mixture into a flask, adding 300-500ml of concentrated sulfuric acid into the flask, shaking the flask to fully mixing solid and liquid uniformly, and filtering under reduced pressure at 130 DEG C to remove the excess boron trifluoride. The method disclosed by the invention adopts a reasonable process to prepare the boron trifluoride easily and is the simplest and ideal technology for preparing the boron trifluoride used as the catalyst.

Description

technical field [0001] The invention relates to a chemical product, in particular to a technology for preparing boron trifluoride as a catalyst, which is suitable for producing 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, BF3 can be used in various forms, such as used in a single gaseous state, or used toge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B35/06B01J27/12
Inventor 李中元
Owner TIANJIN TAIHENG GASES
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