Wood preservative compositions and a process for their production
US4804494A · kind A · utility
10Cited by
12References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 23, 1987 |
| Grant date | Feb 14, 1989 |
| Priority date | — |
| Expiry date | Apr 23, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01G28/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A copper arsenate composition suitable for incorporation in a copper/chrome/arsenic wood preservative composition is made by reacting copper metal with a source of 5-valent arsenic such as arsenic acid under the oxidizing influence of hydrogen peroxide. The quantity of arsenic acid used may be made consistent with the arsenic to copper ratio required in the final wood preservative composition which may be made up by including a suitable source of chromium with the copper arsenate reaction product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.