Process for preparation of lead compounds
US4324768A · kind A · utility
10Cited by
11References
8Claims
0Family size
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Key dates
| Filing date | Dec 16, 1980 |
| Grant date | Apr 13, 1982 |
| Priority date | — |
| Expiry date | Dec 16, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/80
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Disclosed is a process for the preparation of lead compounds which comprises reacting lead monoxide according to the wet method with an inorganic acid or organic acid in the presence of hydroxylamine under such conditions that the initial pH value of the reaction system is not higher than 7. Lead monoxide according to the wet method has an excellent reactivity with an inorganic acid or organic acid, but it contains higher oxides such as lead dioxide and minium, which cause coloration in lead compound products. According to this process, this undesirable coloration can effectively prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.