"The largest production of the acid [water fluoridation chemicals] is as a byproduct of phosphate fertilizer manufacture."

One of several companies, LCI, sells fluoride to municipalities. Read about LCI's recommended uses of fluoride. Here are some excerpts from their web page.

Founded in 1983, LCI LTD started as a supplier of fluorides to municipalities for fluoridation of their potable water systems.

In 1993, LCI purchased a Hydrofluoric Acid plant, Norfluor, S.A. de C.V. in Juarez, México. Today, LCI offers a wide range of specialty fluorides for water fluoridation and industrial applications.

Properties
It is a 20 to 35 percent aqueous solution. It is a colorless to straw yellow , transparent, fuming, corrosive liquid. It has a pungent odor and irritating action on the skin.

Manufacture
Fluorosilicic acid (Hydrofluorosilicic acid) is manufactured by two different processes, resulting in products with different characteristics. The largest production of the acid is as a byproduct of phosphate fertilizer manufacture. A smaller amount is produced from HF and silica resulting in a purer product at slightly higher strength. [Editor: this is an EXACT quote from their web page, as of September 15, 1999]

Uses:

  • Sterilization of equipment
  • Electroplating
  • Tanning of animal hides
  • Ceramics and Glass: Glass etching
  • Commercial Laundry: As a neutralizer for alkalis
  • Hardening of Cement
  • Oil well acidizing
  • Rust and Stain removal for textiles
  • Wood preservative
  • Water fluoridation

Manufacture
Sodium Fluoride is made by neutralizing Hydrofluorosilicic acid with caustic soda (NaOH).

Uses:

  • Commercial Laundry. Laundry souring agent
  • Manufacture of vitreous enamels
  • Manufacture of coated papersWood preserative
  • Water fluoridation

 

 

 

 

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