Method of removing iron sulfide and sludge from metal surfaces
US4032360A · kind A · utility
Inventor
Key dates
| Filing date | Mar 17, 1976 |
| Grant date | Jun 28, 1977 |
| Priority date | — |
| Expiry date | Mar 17, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D1/72
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An oil-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 in an oil system, the composition comprising: PA1 A. from about 2 to about 15% by weight of a high molecular weight linear diamine; PA1 B. from about 3 to about 20% by weight of acetic acid; PA1 C. from about 20 to about 50% by weight of a low molecular weight ketone ether solvent; PA1 D. from about 1 to about 15% by weight of an alcohol solvent; and PA1 E. from about 20 to about 50% by weight of a heavy aromatic naphtha solvent. In the method of removing iron sulfide and sludge from the interior metal surfaces in an oil system, the above composition is added to the effluent of the oil 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 1 to about 20 parts per million of effluent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.