Method and the reuse of sewage waters of the combined urea-ammon

Chemistry of inorganic compounds – Nitrogen or compound thereof – Ammonia or ammonium hydroxide

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564 69, C01C 104

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active

043270689

ABSTRACT:
A method is disclosed for reusing the processing condensates in a combined plant for the production of ammonia and urea. The condensates are combined into a single stream, filtered to remove the solid substances in suspension, if any, and fed to a boiler for the production of steam while exploiting the sensible heat. Pollution of sewage waters is prevented while obtaining a considerable economy in the running costs.

REFERENCES:
patent: 3361534 (1968-01-01), Johnson et al.
patent: 3922222 (1975-11-01), Van Moorsel
Olsen, Unit Processes and Principles of Chemical Engineering, (1932), pp. 1-3, D. Van Nostrand Co., Inc.
Riegel, Industrial Chemistry, Fifth Edition, (1949), Reinhold Publishing Corporation, pp. 255-257.

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