Solvent cleaning process
US7497877B2 · kind B2 · utility
6Cited by
37References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2003 |
| Grant date | Mar 3, 2009 |
| Priority date | — |
| Expiry date | Oct 9, 2025 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06F43/007
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An improved solvent cleaning process of cleaning a non-aqueous solvent used in a dry cleaning process for fabrics including consecutive wash cycles for washing respective fabrics batches, including a basic solvent refining cycle and a first advanced solvent refining cycle, the basic solvent refining cycle including a step of separating solvent into a first solvent fraction and a second solvent fraction which is less clean than the first fraction, wherein the basic and first advanced solvent refining cycles are independently effected when solvent to be cleaned fulfils a respective predetermined condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.