Method of cleaning surfaces with CO.sub.2 -neutralized amine com

Details Method of cleaning surfaces with CO.sub.2 -neutralized amine com Method of cleaning surfaces with CO.sub.2 -neutralized amine com

1977-04-22

1979-01-23

Caroff, Marc L.

Cleaning and liquid contact with solids

Processes

Including forming a solidified or hardened coating for cleaning

134 22R, 134 30, 134 38, 134 39, 134 40, 252 90, 252153, 252154, 252155, 252544, B08B 308, B08B 310

Patent

active

041359470

ABSTRACT:
Organic coatings or deposits are removed from a surface, such as an oven surface, by applying to the coating an aqueous composition containing a primary or secondary amine neutralized with an amount of carbon dioxide in the composition sufficient to cause the composition to have a pH of 10 or less, subjecting the applied composition to conditions whereby partial pressure of carbon dioxide acting on the composition is less than the partial pressure of carbon dioxide in the composition at the temperature of use, and thereafter mechanically removing the coating. The composition may optionally contain a water-soluble organic solvent or a thickening agent.

REFERENCES:
patent: 3546124 (1970-12-01), Fleischer
patent: 3615825 (1971-10-01), Gansser
patent: 3658711 (1972-04-01), Mukai et al.
patent: 3804771 (1974-04-01), Margolis
patent: 3827983 (1974-08-01), Mitchell et al.
patent: 3829387 (1974-08-01), Wise et al.
Woertz, Can. J. Chem. Eng., "Experiments with Solvent-Amine-Water for Removing CO.sub.2 from Gas", vol. 50, Jun. 1972, pp. 425-427.
Barkar et al., Chem. Abs., Abstract No. 111459c, vol. 80, 1974, p. 199.
Tsanov et al., Chem. Abs., Abstract No. 174083s, vol. 81, 1974, p. 288.

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