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Method of preparing ultraphosphoric acid

  • US 4,309,394 A
  • Filed: 04/09/1980
  • Issued: 01/05/1982
  • Est. Priority Date: 04/09/1980
  • Status: Expired due to Term
First Claim
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1. A process for preparing ultraphosphoric acid which comprises:

  • (a) bringing together in a reaction zone elemental phosphorus, a sufficient amount of oxygen in a free-oxygen containing gas to form phosphorus pentoxide, and sufficient water to form ultraphosphoric acid, the mole ratio of water to phosphorus pentoxide being less than 1;

    1, to form a product stream;

    (b) removing heat from the product stream to cool the product stream below the dew point of ultraphosphoric acid; and

    (c) collecting the ultraphosphoric acid.

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