Method for cleaning heavy hydrocarbon scale adhered to heat exchanger and piping structure for cleaning
US6283133A · kind A · utility
10Cited by
6References
15Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jul 30, 1998 |
| Grant date | Sep 4, 2001 |
| Priority date | — |
| Expiry date | Jul 30, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF28G9/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a method for cleaning heavy hydrocarbon scale from a shell and tube heat exchanger or other such equipment incorporated in a device in a petroleum refining plant or the like that processes petroleum hydrocarbons as a raw material. A mixture of petroleum-derived hydrocarbon A which can dissolve the oil component of the heavy hydrocarbon scale and an oxygen-containing polar organic compound B that promotes dissolution and dispersion is employed as the organic cleaning solvent. As a result, the heavy hydrocarbon scale can be removed with surety within a short period of time at low cost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.