US4209501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chlorides of lead, zinz, copper, silver and gold
Assignee: Cato Research Corp
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Filing: 1979-01-04
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Granted: 1980-06-24
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Expires: 1999-01-04
Abstract
Abstract A process for forming a metal chloride of a metal or its compound comprising forming a liquid fused salt bath mixture of at least two metal chlorides with one of the chlorides being selected from the group consisting of ferric chloride, ferrous chloride, cupric chloride and cuprous chloride, and introducing the metal or compound into the liquid fused salt bath in the presence of a chlorine source to form the metal chloride and elemental sulfur, and recovering the formed chloride from the liquid fused salt bath mixture. Chlorine gas or sulfur chloride may be introduced into the bath as an additional source of chlorine for reaction with the metal and for the generation of a portion of the ferrous chloride or cuprous chloride into ferric chloride or cupric chloride.
Inventors
- 👤 Paul R. Kruesi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:50
CPC Classifications
C; C01; C01B; C01B9/00; C01B9/02; C01G; C01G21/00; C01G21/16; C01G3/00; C01G3/04; C01G3/05; C01G5/00; C01G5/02; C01G7/00; C01G9/00; C01G9/04; Y; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/12
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
165 words
A process for making the chloride of a metal selected from the group consisting of lead, zinc, copper, silver and gold from the sulfide of said metal in the absence of air which comprises: (a) forming a liquid fused salt bath in which the formed metal chloride is soluble and wherein the liquid fused salt bath comprises at least two different chlorides with one chloride comprising at least 15% by weight of the fused salt bath being selected from the group consisting of ferric chloride, ferrous chloride, cupric chloride, cuprous chloride and mixtures thereof and the other chloride being selected from the group consisting of alkali metal chlorides, alkaline earth metal chlorides, zinc chloride and ammonium chloride; (b) introducing the metal sulfide into the liquid fused bath in the presence of a chlorine source to form the metal chloride and elemental sulfur at a temperature below the melting point of the formed chloride; and (c) recovering the formed metal chloride from the fused bath mixture.
Claim 2
Dependent Claim
165 words
A process for making the chloride of a metal selected from the group consisting of lead, zinc, copper, silver and gold from the sulfide of said metal in the absence of air which comprises: (a) forming a liquid fused salt bath in which the formed metal chloride is soluble and wherein the liquid fused salt bath comprises at least two different chlorides with one chloride comprising at least 15% by weight of the fused salt bath being selected from the group consisting of ferric chloride, ferrous chloride, cupric chloride, cuprous chloride and mixtures thereof and the other chloride being selected from the group consisting of alkali metal chlorides, alkaline earth metal chlorides, zinc chloride and ammonium chloride; (b) introducing the metal sulfide into the liquid fused bath in the presence of a chlorine source to form the metal chloride and elemental sulfur at a temperature below the melting point of the formed chloride; and (c) recovering the formed metal chloride from the fused bath mixture.
Claim 3
Dependent Claim
18 words
The process of claim 1 performed at a temperature of from about 150° C. to about 550° C.
Claim 4
Dependent Claim
27 words
The process of claim 1 wherein the chlorine source is selected from the group consisting of ferric chloride, cupric chloride, chlorine gas, sulfur monochloride and mixtures thereof.
Claim 5
Dependent Claim
12 words
The process of claim 3 wherein the chlorine source is cupric chloride.
Claim 6
Dependent Claim
12 words
The process of claim 3 wherein the chlorine source is ferric chloride.
Claim 7
Dependent Claim
13 words
The process of claim 3 wherein the chlorine source is elemental chlorine gas.
Claim 8
Dependent Claim
15 words
The process of claim 3 wherein the chlorine source is ferric chloride and chlorine gas.
Claim 9
Dependent Claim
15 words
The process of claim 3 wherein the chlorine source is cupric chloride and chlorine gas.
Claim 10
Dependent Claim
13 words
The process of claim 3 in which the metal sulfide is lead sulfide.
Claim 11
Dependent Claim
21 words
The process of claim 9 in which the fused salt bath is comprised of sodium chloride, ferric chloride and zinc chloride.
Claim 12
Dependent Claim
21 words
The process of claim 9 in which the fused salt bath is comprised of sodium chloride, cuprous choride and cupric chloride.
Claim 13
Dependent Claim
14 words
The process of claim 3 in which the metal sulfide is a zinc sulfide.
Claim 14
Dependent Claim
21 words
The process of claim 12 in which said fused salt bath is comprised of ferric chloride, sodium chloride and zinc chloride.
Claim 15
Dependent Claim
21 words
The process of claim 12 in which said fused salt bath is comprised of sodium chloride, cuprous chloride and cupric chloride.
Claim 16
Dependent Claim
14 words
The process of claim 3 in which the metal sulfate is a copper sulfide.
Claim 17
Dependent Claim
23 words
The process of claim 15 in which said fused salt bath is comprised of ferric chloride, sodium chloride, zinc chloride and potassium chloride.
Claim 18
Dependent Claim
19 words
The process of claim 15 in which said fused salt bath is comprised of ferric chloride and sodium chloride.
Claim 19
Dependent Claim
21 words
The process of claim 15 in which said fused salt bath is comprised of sodium chloride, cuprous choride and cupric chloride.
Claim 20
Dependent Claim
13 words
The process of claim 3 in which the sulfide is a silver sulfide.
Claim 21
Dependent Claim
19 words
The process of claim 19 in which said fused salt bath is comprised of ferric chloride and sodium chloride.
Claim 22
Dependent Claim
21 words
The process of claim 19 in which said fused salt bath is comprised of ferric chloride, sodium chloride and zinc chloride.
Claim 23
Dependent Claim
14 words
The process of claim 3 in which the metal sulfide is a gold sulfide.
Claim 24
Dependent Claim
19 words
The process of claim 22 in which said fused salt bath is comprised of ferric chloride and sodium chloride.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-06-24 | 1983-12-24 | 1984-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-24 | 1987-12-24 | 1988-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-24 | 1991-12-24 | 1992-06-24 | $7700.00 | Window Closed / Lapsed |