Claims
- 1. A liquid composition useful for selective dissolution of soft metal, the composition being non-aqueous and comprising:
- an organic nitrocompound that, upon exposure to the soft metal, oxidizes the soft metal to form a first soft metal salt;
- a carboxylic acid that, upon exposure to the soft metal salt, reacts with the first soft metal salt to form a second metal salt that is soluble in the composition; and
- from about 80 to 99% by weight of the composition of at least one organic solvent, wherein said organic solvent is other than said organic nitrocompound and said carboxylic acid.
- 2. A liquid composition as set forth in claim 1 wherein the organic solvent is selected from the group consisting of kerosene, toluene, mineral oil, glycol ethers, acetone, methylethyl ketone, methanol, ethanol, isopropanol, ethyl acetate, acetonitrile and mixtures thereof.
- 3. A liquid composition as set forth in claim 1 wherein the organic solvent is a petroleum distillate.
- 4. A liquid composition as set forth in claim 3 wherein the composition further comprises an odorous compound.
- 5. A liquid composition as set forth in claim 1 wherein the organic nitrocompound is selected from the group consisting of nitroaromatic compounds comprising at least one six-carbon ring, nitroalkanes of from one to about six carbons, nitroalkanols of from one to about six carbons and nitroalkanonitriles of from two to about six carbons.
- 6. A liquid composition as set forth in claim 5 wherein the organic nitrocompound is selected from the group consisting of nitrobenzene, nitrotoluene, nitrophenol, chloronitrobenzene, nitroanisole, hexylnitrobenzene, nitrobenzonitrile, nitrobenzoic acid, nitrobenzamide, nitroxylene, nitroaphthalene and nitrobiphenyl.
- 7. A liquid composition as set forth in claim 6 wherein the organic nitrocompound is nitrobenzene.
- 8. A liquid composition as set forth in claim 1 wherein the carboxylic acid, in the presence of steel and the first soft metal salt, reacts preferentially with the first soft metal salt.
- 9. A liquid composition as set forth in claim 8 wherein the carboxylic acid is selected from the group consisting of acetic acid, propionic acid, butyric acid, lactic acid, and mixtures thereof.
- 10. A liquid composition as set forth in claim 9 wherein the soft metal is lead.
- 11. A liquid composition as set forth in claim 9 wherein the soft metal is copper.
- 12. A liquid composition as set forth in claim 1 wherein the soft metal is selected from the group consisting of lead, copper, cadmium, zinc, tin and alloys thereof.
- 13. A liquid composition as set forth in claim 12 wherein the soft metal is copper.
- 14. A liquid composition as set forth in claim 12 wherein the soft metal is lead.
- 15. A liquid composition as set forth in claim 14 wherein upon exposure of one square centimeter of lead surface to one gram of the composition for 24 hours at 25.degree. C., the composition has the ability to dissolve at least about 0.01 grams of the lead surface.
- 16. A liquid composition as set forth in claim 1 wherein the organic solvent makes up at least about 90% by weight of the composition.
- 17. A liquid composition as set forth in claim 16 wherein the organic solvent is a hydrocarbon.
- 18. A liquid composition as set forth in claim 16 wherein the organic solvent is kerosene.
Parent Case Info
This is a continuation-in-part of application Ser. No. 08/719,893 filed Sep. 25, 1996, now abandoned which is a Divisional of Ser. No. 08/513,660, filed Aug. 11, 1995, now U.S. Pat. No. 5,565,039, which is a File Wrapper Continuation of Ser. No. 08/253,667, filed Jun. 3, 1994 now abandoned.
US Referenced Citations (11)
Foreign Referenced Citations (3)
Number |
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57-156457 |
Sep 1982 |
JPX |
57-185239 |
Nov 1982 |
JPX |
63-066826 |
Dec 1988 |
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Non-Patent Literature Citations (6)
Entry |
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Divisions (1)
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Number |
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513660 |
Aug 1995 |
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Continuations (1)
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Number |
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Parent |
253667 |
Jun 1994 |
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Continuation in Parts (1)
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719893 |
Sep 1996 |
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