Preparation method of silver tetrafluoroborate

Abstract

The invention relates to a preparation method of silver tetrafluoroborate, which comprises the steps of mixing and reacting a fluoboric acid source and silver salt in a reaction medium to obtain the silver tetrafluoroborate, wherein the fluoboric acid source is selected from at least one of tetrafluoroborate and tetrafluoroboric acid; and the reaction medium is a mixed solvent of a first organic solvent and water or water, and the first organic solvent is selected from at least one of diethyl ether, nitromethane and methylbenzene. The preparation method is wide in raw material applicability, the raw materials are low in toxicity and easy to obtain, the problem that the toxicity is too high when silver fluoride and boron trifluoride serve as reaction raw materials is solved, the reaction can be carried out at the room temperature, the reaction condition is mild, the reaction is easy to operate, the needed time is short, the requirement for equipment is low, and the production safety problem is guaranteed.

Description

technical field [0001] The invention relates to the technical field of chemical synthesis, in particular to a preparation method of silver tetrafluoroborate. Background technique [0002] Silver tetrafluoroborate (AgBF 4 ) is a noble metal salt used to replace halide ions or ligands with a non-coordinating anion fluoroborate, and has a wide range of applications in metalorganic chemistry. However, the poor tolerance and harsh synthesis process of silver tetrafluoroborate limit its large-scale production. [0003] At present, the industrial production of silver fluoroborate adopts the silver fluoride method, that is, boron trifluoride gas is continuously injected into the silver fluoride / nitromethane dispersion, and the temperature is kept at 60°C until the solid silver fluoride is almost dissolved. , stop the introduction of boron trifluoride, and then pass through inert gas to purge and remove excess boron trifluoride to obtain a solution of silver fluoroborate in nitrome...

AI Technical Summary

Problems solved by technology

This method of synthesizing silver fluoride and boron trifluoride gas in nitromethane not only has low yield, but also the main problem is safety and cost in large-scale production

[0004] First of all, the chemical properties of the precursors silver fluoride and boron trifluoride are unstable, highly toxic, easy to decompose when exposed to air or light, and even have the risk of explosion, especially in large-scale production, which is very easy to cause leakage, so the safety problem is very big , which in turn leads to higher requirements for the working environment and safety protection of the equipment, and its production cost is extremely expensive

In addition, silver tetrafluoroborate products are easy to deteriorate and absorb moisture. The current process is difficult to achieve the preparation of high-purity silver fluoroborate, which further leads to an increase in the production cost of silver tetrafluoroborate and limits the development of downstream products.

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