Cationic and anionic lignin amines
US4775744A · kind A · utility
18Cited by
8References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1987 |
| Grant date | Oct 4, 1988 |
| Priority date | — |
| Expiry date | Jul 23, 2007 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/66
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Lignin amines are disclosed which are characterized by high nitrogen content and are water soluble at both alkaline and acidic pH values. The lignin amines have utility as flocculants, filtration aids, precipitants, scale inhibitors, asphalt emulsifiers, fluid loss additives, oil well cement additives, corrosion inhibitors, retention aids, cationic dispersants, and tall oil pitch emulsifiers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.