Fibrous material for emulsion breaker and method for manufacturing it
US4127500A · kind A · utility
4Cited by
2References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 19, 1977 |
| Grant date | Nov 28, 1978 |
| Priority date | — |
| Expiry date | Jul 19, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S524/922
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A fibrous material useful for treating a waste water having a suitable amount and ratio of hydrophobic group and hydrophilic group is produced by reacting a fibrous material with sulfuric acid and/or chlorosulfonic acid, and then with alkylamines having 2 to 20 carbon atoms and optionally finally with, for example, ammonia, amines and/or hydrazines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.