In the production of hydrofluoric acid from fluorite, what is the optimal grade index for fluorite?
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In the production of hydrofluoric acid from fluorite, what is the optimal grade index for fluorite?
Silicon: 0.5%, Water: 0.1%, Calcium carbonate: 1%; mainly 98%
It’s hard to find stone powder now, with over 97% of it out of stock, right?
The calcium fluoride content is generally 97%, and a silicon content of less than 2% is acceptable; silicon reacts with hydrofluoric acid to form silicon tetrafluoride, which has a high boiling point and can be easily removed.
Does anyone among you have the process for producing hydrofluoric acid from fluorite? I’d like to learn about it* www.wendy112759@sina.com
The calcium fluoride content is generally 97%, and a silicon content of less than 2% is acceptable; silicon reacts with hydrofluoric acid to form silicon tetrafluoride, which has a high boiling point and can be easily removed
The calcium fluoride content is generally 97%, and a silicon content of less than 2% is acceptable; silicon reacts with hydrofluoric acid to form silicon tetrafluoride, which has a high boiling point and can be easily removed. Are such standards too strict?
It depends on the process used to produce hydrofluoric acid. If a distillation system is employed to produce anhydrous hydrogen fluoride, then the quality requirements for fluorite are relatively low; however, the higher the silica content in the fluorite, the higher the cost per unit produced. If hydrogen fluoride gas is used without distillation, then higher quality fluorite is required, with a purity of over 97% being the minimum standard, and the higher the purity, the better. Yet it’s difficult to find fluorite with a purity of over 98%, and if such material is available, it is quite expensive!