Assertion: sodium carbonate | /r/CapableOf | heat 4with phosphoric acid
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Source sentences:
text: The method of reducing organic material and increasing the density of sodium carbonate produced from solutions of crude trona containing organic impurities which comprises crystallizing from said crude trona solution a compound selected from the group consisting of sodium sesquicarbonate, sodium bicarbonate and sodium carbonate monohydrate, said crystals containing organic impurities, and calcining said crystals in a non-reactive atmosphere at a temperature between 400 C. and 800 C. for a time sucient (a) to volatilize substantial amounts of organic impurities therefrom, (b) to convert most of the remainder of the organic impurities to a coke, and (c) to convert said sodium carbonate-containing crystals into soda ash, said soda ash, so produced, having a high bulk density and, when heated 4with phosphoric acid, producing a sodium tripolyphosphate with a reflect-ance above about 85 and said soda ash giving a low foam index when mixed with phosphoric acid.