Arc discharge lamp containing means for reducing mercury leaching
View Patent ↗An arc discharge lamp containing a quantity of elemental mercury at least partially convertible to soluble mercury, provides for including within the lamp a quantity of a non-metallic copper-containing compound and an ingredient X, said ingredient X including a noble metal or a noble metal compound selected from the group consisting of silver and compounds of silver, gold and platinum, and a lamp containing same.
1. In an arc discharge lamp containing a quantity of elemental mercury at least partially convertible to soluble mercury, the improvement comprising:
including within said lamp a quantity of a non-metallic copper-containing compound and an ingredient X, said ingredient X including a noble metal or noble metal compound selected from the group consisting of silver and compounds of silver, gold and platinum.
2. The lamp of claim 1 wherein said soluble mercury is present as mercury oxide.
3. The lamp of claim 1 wherein said non-metallic copper-containing compound comprises copper dihydroxide carbonate.
4. The lamp of claim 1 wherein said ingredient X comprises elemental silver.
5. The lamp of claim 1 wherein said ingredient X comprises silver oxide as Ag 2 O.
6. The lamp of claim 1 wherein said ingredient X comprises silver carbonate.
7. The lamp of claim 1 wherein said ingredient X comprises gold chloride as AuCl 3 .
8. In an arc discharge lamp containing a quantity of elemental mercury at least partially convertible to soluble mercury, the improvement comprising:
including within said lamp a quantity of a non-metallic copper-containing compound and platinum chloride as PtCl 2 .
9. In an arc discharge lamp containing a quantity of elemental mercury at least partially convertible to soluble mercury and having a base held to said lamp by a basing cement, the improvement comprising:
a quantity of a non-metallic copper-containing compound and an ingredient X included in said basing cement, said ingredient X including a noble metal or noble metal compound selected from the group consisting of silver and compounds of silver, gold and platinum.