Phospho-gypsum recovery process

Phosphoanhydrite process

Phosphohemihydrate process for purification of gypsum

Phosphoric acid process with high circulation rates

Phosphoric acid production

Porous hydroxyl apatite material

Preparation and use of organic extractant for recovery of...

Preparation of a calcium sulfate anhydrite material of low chlor

Preparation of magnesium chloride

Preparation of monocalcium phosphate and/or phosphoric acid from

Preparation of pure magnesian values

Preparation of useful MgCl.sub.2. solution with subsequent recov

Pretreatment of brine for boron removal

Procedure for obtaining high purity magnesium salts or their con

Process and apparatus for calcining gypsum

Process and apparatus for manufacturing phosphoric acid

Process and apparatus for treating foundry sludge to recover...

Process and device for manufacturing synthetic anhydrous calcium

Process and shaft kiln for the burning of lime or similar bulk m

Process for arc heater production of defluorinated phosphates