Compositions – Fluent dielectric – N-containing
Patent
1974-09-23
1976-07-13
Herbert, Jr., Thomas J.
Compositions
Fluent dielectric
N-containing
134 22C, 134 34, 252544, 252547, C11D 162, C11D 1835, C11D 330
Patent
active
039692817
ABSTRACT:
A water-soluble composition capable of removing iron sulfide and sludge from metal surfaces and a method of such removal of iron sulfide and sludge from metal surfaces, particularly in a glycol system, the composition comprising:
A. from about 2 to about 15% by weight of a high molecular weight linear diamine;
B. from about 2.5 to about 18% by weight of acetic acid;
C. from about 1 to about 10% by weight of an organic nitrogen substituted imidazoline;
D. from about 6 to about 15% by weight of a non-ionic surfactant;
E. from about 2 to about 8% by weight of a quaternary ammonium chloride;
F. from about 1 to about 15% by weight of an alcohol solvent; and
G. the remainder, water.
In the method of removing iron sulfide and sludge from interior metal surfaces, particularly in a glycol system, the above composition is added to the effluent of the glycol system for onstream treatment in an amount effective to remove the iron sulfide and sludge. Generally, the composition is added to the effluent in an amount of from about 200 to about 1,000 parts per million of effluent.
REFERENCES:
patent: 2356254 (1944-08-01), Lehmann et al.
patent: 3325310 (1967-06-01), Barusch
patent: 3794523 (1974-02-01), Thompson
B359,946, Jan. 1975, Sutton.
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