COMPOSITION FOR REMOVING DEPOSITS AND SCUM FROM INNER SURFACES OF HEAT-EXCHANGE EQUIPMENT Russian patent published in 2008 - IPC C02F5/10 F28G9/00 

FIELD: chemistry.

SUBSTANCE: invention pertains to the chemical industry, heat energy, water supply and other fields of national economy, and specifically to compositions for removing deposits and scum from inner surfaces of pipes, heat-exchangers and technological apparatus. The proposed composition consists of sodium or potassium pyrosulphate, or ammonia, polypheonol compounds of wood or softwood bark, urotropin, non-ionic surfactant, hydrochloric acid, acetone and water with the following content of components in mass%: pyrosulphate of sodium or potassium or ammonia or persulphate of sodium or potassium or ammonia - 0.09-10, polyphenol compounds of wood or softwood bark 0.003-6.0, urotropin 0.01-4, non-ionic surfactant - 0.0015-0.1, hydrochloric acid - 2.0-24.0, acetone - 1.0-8.0, water constitutes the rest.

EFFECT: increased rate of dissolving of deposits and scum with retention of high degree of protection from corrosion.

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