Assertion: crystalline pyrophosphoric acid | /r/CapableOf | comprise forming seeded suspension
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text: A process for forming crystalline pyrophosphoric acid, which comprises forming a seeded suspension by dispersing finely divided pyrophosphoric acid crystals into a first suspension containing in the dispersed phase liquid polyphosphoric acid having a P 0 content of from about 78 to about 82 weight percent, maintaining the temperature of the resulting seeded suspension below the melting point of said pyrophosphoric acid crystals until said liquid polyphosphoric acid has been converted to crystalline pyrophosphoric acid and recovering said crystalline pyrophosphoric acid; the continuous phase of said first suspension being a non-aqueous solvent having a boiling point below about 150 C. and a viscosity at 25 C. below about two poises.