Assertion: pyrophosphoric acid | /r/MadeOf | 79.8i0.5% p
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Source sentences:
text: A method for the production of a dry, granular solid acid composition composed essentially of pyrophosphoric acid which comprises mixing liquid phosphoric acid containing 79.8i0.5% P 0 with a granular mass of previously prepared solid pyrophosphoric acid in the proportion of 2-4 parts of solid pyrophosphoric acid per part of liquid phosphoric acid, maintaining the temperature during mixing within the range of 20-35 C. and continuing mixing until the resultant mixture is a dry, granular solid, and returning a portion of the dry, granular solid for admixture with additional liquid phosphoric acid to produce additional dry, granular solid.