Ethoxylated lignite composition and method of preparing
US4578456A · kind A · utility
6Cited by
2References
12Claims
0Family size
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Inventor
Key dates
| Filing date | Apr 12, 1984 |
| Grant date | Mar 25, 1986 |
| Priority date | — |
| Expiry date | Apr 12, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/26
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Novel, ethoxylated lignites which exhibit excellent water solubility as well as solubility in organic liquids are obtained by ethoxylating lignite at elevated temperatures using various weight ratios of ethylene oxide to lignite, the ethoxylation being conducted using an alkali metal alkylate catalyst in a solvent which is generally inert under reaction conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.