Esterified dicarboxylic acid and its use
US4430238A · kind A · utility
4Cited by
3References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 10, 1982 |
| Grant date | Feb 7, 1984 |
| Priority date | — |
| Expiry date | May 10, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S516/01
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention specifies an esterified dicarboxylic acid of the general formula ##STR1## in which R.sup.I is an aliphatic hydrocarbon group with 7-21 carbon atoms, R.sup.II is a hydrocarbon radical with 2-6 carbon atoms and A is an alkylene oxide group derived from an alkylene oxide with 2-4 carbon atoms. Particularly preferred are compounds in which A relates to a group derived from ethylene oxide and in which R.sup.II is --CH.dbd.CH-- or the phenylene group --C.sub.6 H.sub.4 --. The compound exhibits selective properties when used in the flotation of oxide and salt type minerals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.