Sand reclamation
US4416694A · kind A · utility
10Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 29, 1981 |
| Grant date | Nov 22, 1983 |
| Priority date | — |
| Expiry date | May 29, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S241/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A foundry sand composition which comprises particulate sand, aqueous sodium silicate as binder and an alkylene carbonate as hardener and which after use for moulds and/or cores in metal casting can be reclaimed for reuse by an attrition process contains before use no more than 11% by weight of alkylene carbonate based on the weight of aqueous sodium silicate and during the reclamation process has a residual moisture content of less than 0.8% by weight as determined by loss on ignition on 550.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.