Use of hydrazine compounds as corrosion inhibitors in caustic so

Details Use of hydrazine compounds as corrosion inhibitors in caustic so Use of hydrazine compounds as corrosion inhibitors in caustic so

1980-07-25

1981-08-04

Hayes, Lorenzo B.

Chemical apparatus and process disinfecting, deodorizing, preser

Process disinfecting, preserving, deodorizing, or sterilizing

Maintaining environment nondestructive to metal

23306, 23307, 106 1415, 159DIG13, 203 7, 252390, 423269, C23F 1106

Patent

active

042821789

ABSTRACT:
The addition of a small amount of hydrazine or a derivative or salt thereof serves to inhibit the corrosive effect of caustic such as sodium hydroxide on metal surfaces during the manufacture of the caustic or in processes using same. For instance, aqueous sodium hydroxide solutions having hydrazine or a derivative or salt thereof added thereto in an effective concentration in the range of from as little as about 2 ppm or less and up to about 1000 ppm, preferably of from about 2 to about 200 ppm, and most preferably from about 3 to about 40 ppm, can be concentrated by evaporation in nickel or nickel alloy equipment at temperatures as high as 150.degree.-175.degree. C. without causing undue corrosion.

REFERENCES:
patent: 2258545 (1941-10-01), Davies
patent: 2403789 (1946-07-01), Cummins
patent: 2404453 (1946-07-01), Osborne et al.
patent: 2562169 (1951-07-01), Brumbaugh
patent: 2610105 (1951-09-01), Pye
patent: 2790707 (1957-04-01), Johnson
patent: 2823177 (1958-02-01), Osborne
patent: 2889204 (1959-06-01), Meyer et al.
patent: 3042491 (1962-07-01), Smith
patent: 3325251 (1967-06-01), Van den Okker
patent: 3728281 (1973-04-01), Marks et al.
patent: 3962113 (1976-06-01), Schiessl et al.
Chem. Abs., 84:137943p; 78:18401b; 63:9519f; 61:6655c; 79:138308u; 79:80874g; 78:161639r; 79:23333k.

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