Patent US3697608A successfully refreshed from Google Patents.
US3697608A
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Dechlorination process
Assignee: EIDP Inc
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Filing: 1968-10-02
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Granted: 1972-10-10
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Expires: 1988-10-02
Abstract
Abstract A dechlorination process which comprises contacting halogenated hydrocarbons with a melt comprising iron chloride and/or copper chloride, and alkali metal chloride(s). This process utilizes a reduced melt, i.e., a melt containing ferrous and/or cuprous chlorides, to dechlorinate; various process parameters are controlled to provide desired product selectivity. In addition, the dechlorination process may be carried out simultaneously with chlorination or dehydrochlorination reactions.
Inventors
- 👤 Harold Edward Bellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:05
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/25; C07C17/07; C07C17/087; C07C17/23; C07C21/00; C07C21/02; C07C21/04; C07C21/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
24 words
A process in accordance with claim 1 wherein the halogenated hydrocarbon is pentachloroethane and the dechlorinated product comprises a mixture of trichloroethylene and perchloroethylene.
Claim 2
Dependent Claim
27 words
A process in accordance with claim 1 wherein the halogenated hydrocarbon contains at least one fluorine atom and the dechlorinated product contains at least one fluorine atom.
Claim 3
Dependent Claim
17 words
A process in accordance with claim 1 wherein the melt contains at least 50 percent cuprous chloride.
Claim 4
Dependent Claim
16 words
A process in accordance with claim 1 wherein the halogenated hydrocarbon is dispersed in the melt.
Claim 5
Dependent Claim
211 words
A process of simultaneously dechlorinating a chlorinated hydrocarbon and chlorinating a chlorine acceptor which comprises simultaneously contacting a C2 to C10 halogenated hydrocarbon containing at least two chlorine atoms wherein at least one chlorine atom is on each of two adjacent carbon atoms and a chlorine acceptor selected from the group consisting of hydrogen, C2 to C10 unsaturated hydrocarbons, incompletely chlorinated derivatives of C2 to C10 unsaturated hydrocarbons, and mixtures thereof, at a temperature within the range of 100*C.-600*C., with a melt comprising (1) a chloride selected from the group consisting of iron chloride, copper chloride and mixtures thereof and (2) alkali metal chloride(s), by dispersing the chlorinated hydrocarbon and the chlorine acceptor in the melt, wherein: a. at least 50 mole percent of the iron chloride is maintained as ferrous chloride when component (1) consists solely of iron chloride, at least 20 mole percent of the copper chloride is maintained as cuprous chloride when component (1) consists solely of copper chloride, and at least 20 mole percent of the copper chloride is maintained as cuprous chloride when component (1) consists of a mixture of iron chloride and copper chloride; b. the alkali metal chloride is selected from the group consisting of sodium chloride, potassium chloride, lithium chloride and mixtures thereof.
Claim 6
Dependent Claim
24 words
A process in accordance with claim 6 wherein the halogenated hydrocarbon is pentachloroethane and the dechlorinated product comprises a mixture of trichloroethylene and perchloroethylene.
Claim 7
Dependent Claim
27 words
A process in accordance with claim 6 wherein the halogenated hydrocarbon contains at least one fluorine atom and the dechlorinated product contains at least one fluorine Atom.
Claim 8
Dependent Claim
17 words
A process in accordance with claim 6 wherein the melt contains at least 50 percent cuprous chloride.
Claim 9
Dependent Claim
16 words
A process in accordance with claim 6 wherein the halogenated hydrocarbon is dispersed in the melt.
Claim 10
Dependent Claim
54 words
A process for the production of trichloroethylne comprising (1) hydrochlorinating perchlorethylene to pentachloroethane by heating perchloroethylene with hydrogen chloride at a temperature of at least 100*C. in the presence of a Friedel-Crafts catalyst to form pentachloroethane, and (2) dechlorinating said pentachloroethane of step 1 to trichloroethylene in accordance with the process of claim 1.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |