Traitement en cours

Veuillez attendre...

PATENTSCOPE sera indisponible durant quelques heures pour des raisons de maintenance le mardi 26.10.2021 à 12:00 PM CEST
Paramétrages

Paramétrages

Aller à Demande

1. US20110217222 - Process for the acid digestion of metal-containing compounds

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

Claims

1. A process comprising:
providing a metal-containing compound; and
subjecting the metal-containing compound to an acid digestion comprising contacting the metal-containing compound with an aqueous leachant;
wherein the aqueous leachant comprises a mixture of:
sulfuric acid and one or more alkanesulfonic acids having alkane moieties selected from the group consisting of propyl, ethyl and methyl groups, at a weight ratio of alkanesulfonic acid to sulfuric acid of 1:39 to 1:1.
2. The process according to claim 1, wherein the concentration of the sulfuric acid is 0.1 to 50% by weight.
3. The process according to claim 1, wherein the concentration of the one or more alkanesulfonic acids is 0.001 to 50% by weight.
4. The process according to claim 1, wherein the alkanesulfonic acid comprises methanesulfonic acid.
5. The process according to claim 1, wherein the leachant further comprises one or more surfactants selected from the group consisting of nonionics, anionics, cationics, amphoterics and mixtures thereof.
6. The process according to claim 5, wherein the surfactant is present at a concentration of 0.01 to 0.3% by weight, such that a reduction in the contact angle on glass by at least 10° after 1 second in 2% strength aqueous H 2SO 4 solution at 23° C. is provided.
7. The process according to claim 5, wherein the surfactant is present at a concentration of 0.05 to 0.25% by weight, providing for a reduction in the contact angle on glass by at least 20° after 0.5 second in 2% strength aqueous H 2SO 4 solution at 23° C.
8. A copper-winning process comprising the process according to claim 7.
9. The process according to claim 1, wherein the metal-containing compound comprises a metal component selected from the group consisting of copper, titanium, CaF 2, zinc, lead, molybdenum, antimony, bismuth, mercury, cobalt, nickel, aluminium, lanthanum, lanthanides, uranium or a combination thereof.
10. The process according to claim 9, wherein the metal-containing compound comprises a metal component selected from the group consisting of copper, zinc, lanthanum, lanthanides, uranium and combinations thereof.
11. The process according to claim 9, wherein the metal-containing compound comprises a metal component selected from the group consisting of copper, titanium, CaF 2 and combinations thereof.
12. The process according to claim 1, wherein the metal-containing compound comprises a metal component selected from the group consisting of copper, titanium, CaF 2, and combinations thereof.
13. A copper-winning process comprising the process according to claim 1.
14. The process of claim 1, wherein the metal-containing compound comprises copper.
15. The process of claim 1, wherein the metal-containing compound comprises a metal component selected from the group consisting of titanium, CaF 2, zinc, lead, molybdenum, antimony, bismuth, mercury, cobalt, nickel, aluminium, lanthanum, lanthanides, uranium or a combination thereof.
16. The process of claim 1, wherein the metal-containing compound comprises TiO 2 or CaF 2.