Compositions for treating waste water which contains heavy metals
US5397500A · kind A · utility
6Cited by
5References
3Claims
0Family size
Inventor
Key dates
| Filing date | Feb 14, 1994 |
| Grant date | Mar 14, 1995 |
| Priority date | — |
| Expiry date | Feb 14, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2101/22
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A composition for treating waste water comprising Natrolite [Na.sub.2 Al.sub.2 Si.sub.3 O.sub.10. 2H.sub.2 O] from 30 to 40 weight %, Montmorillonite from 20 to 30 weight %, Calcium hydroxide [Ca(OH).sub.2 ] from 20 to 30 weight %, Aluminum sulphate [Al.sub.2 (SO.sub.4).sub.3. 7H.sub.2 O] from 1.5 to 3.5 weight % and Magnesium oxide catalyst agent from 10 to 15 weight percent. The composition is effective in treating waste water containing various heavy metals, particularly, Cu, Ni, Zn, Fe, Pb, Cr.sup.6+ and cyanide and in deoderizing and decreasing chemical oxygen demand (COD).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.