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7361323 Method for the production of phosphoric acid and/or a salt thereof and products thus obtained  
A method for the production of phosphoric acid comprising a phosphate ore attack by a first aqueous chlorohydric acid solution, separation in the attack liquor between a solid insoluble phase...
6251351 Wet-process technique for refining phosphoric acid  
A process for purification by multistage countercurrent extraction of wet-process phosphoric acid includes the steps of (a) preparing an aqueous phosphoric acid by decomposition of crude phosphates...
5391815 Method of separating vinylphosphonic acid from crude mixtures  
Method of separating vinylphosphonic acid from crude mixtures. The invention relates to a method for separating vinylphosphonic acid from crude mixtures, the separation being carried out by...
5006319 Process for removing iron, chromium and vanadium from phosphoric acid  
A process is provided for purifying phosphoric acid, such as wet process phosphoric acid by extracting the impure phosphoric acid with a nonaqueous solvent and contacting the nonaqueous solution of...
Matches 1 - 4 out of 4