US4162948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of dehalogenating halogenated hydrocarbon to yield elemental halogen
Assignee: Central Glass Co Ltd
•
Filing: 1978-04-13
•
Granted: 1979-07-31
•
Expires: 1998-04-13
Abstract
Abstract A halogenated hydrocarbon such as a halogenated ethane or propane is dehalogenated by subjecting to electrolysis an aqueous reaction system containing the halogenated hydrocarbon, a halide of metal having dehalogenating ability and a detergent. The detached halogen leaves the reaction system in elemental form.
Inventors
- 👤 Kiyoshi Yagii
- 👤 Hideki Oshio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:46
CPC Classifications
C; C25; C25B; C25B3/00; C25B3/01; C25B3/11
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
97 words
A method of dehalogenating a halogenated hydrocarbon with liberation of the detached halogen in elemental form, the method comprising the step of subjecting to electrolysis a reaction system containing water, a halogenated hydrocarbon to be dehalogenated, said halogenated hydrocarbon in said reaction system is a halogenated alkane having at least two but not more than three carbon atoms and at least two atoms of at least one halogen selected from the group consisting of fluorine, chlorine and bromine; with the proviso that the halogens to be removed are on different carbon atoms, zinc chloride and a detergent.
Claim 2
Independent Claim
97 words
A method of dehalogenating a halogenated hydrocarbon with liberation of the detached halogen in elemental form, the method comprising the step of subjecting to electrolysis a reaction system containing water, a halogenated hydrocarbon to be dehalogenated, said halogenated hydrocarbon in said reaction system is a halogenated alkane having at least two but not more than three carbon atoms and at least two atoms of at least one halogen selected from the group consisting of fluorine, chlorine and bromine; with the proviso that the halogens to be removed are on different carbon atoms, zinc chloride and a detergent.
Claim 3
Dependent Claim
24 words
A method according to claim 1, wherein said detergent is selected from the group consisting of polyglycolether esters, alkylsulfuric esters and sodium dodecylbenzene sulfonate.
Claim 4
Dependent Claim
38 words
A method according to claim 2, wherein said reaction system contains initially about 0.05 to about 10 moles of said halogenated hydrocarbon and about 0.4 to about 15 moles of said zinc chloride per 1000 g of water.
Claim 5
Dependent Claim
25 words
A method according to claim 3, wherein said reaction system contains about 1 to about 50 g of said detergent per 1000 g of water.
Claim 6
Dependent Claim
13 words
A method according to claim 2, wherein said reaction system comprises an acid.
Claim 7
Dependent Claim
13 words
A method according to claim 2, wherein said reaction system comprises an alcohol.
Claim 8
Dependent Claim
21 words
A method according to claim 1, wherein said reaction system is maintained at temperatures between 0° to 100° C. during electrolysis.
Claim 9
Dependent Claim
25 words
A method according to claim 7, wherein said reaction system is maintained at pressures between 0 and 1 kg/cm 2 by gauge pressure during electrolysis.
Claim 10
Independent Claim
62 words
A method of dechlorinating halogenated alkanes having two or three carbon atoms and at least two chlorine atoms with the two chlorine atoms on different carbon atoms with liberation of the detached chlorine in elemental form, the method comprising the step of subjecting to electrolysis a reaction system containing water, at least one of said halogenated alkanes, zinc chloride and a detergent.
Claim 11
Independent Claim
62 words
A method of dechlorinating halogenated alkanes having two or three carbon atoms and at least two chlorine atoms with the two chlorine atoms on different carbon atoms with liberation of the detached chlorine in elemental form, the method comprising the step of subjecting to electrolysis a reaction system containing water, at least one of said halogenated alkanes, zinc chloride and a detergent.
Claim 12
Dependent Claim
35 words
A method according to claim 9, wherein at least one of said halogenated alkanes in said reaction system has at least one atom of a halogen selected from the group consisting of fluorine and bromine.
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) | 1982-07-30 | 1983-01-29 | 1983-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-30 | 1987-01-29 | 1987-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-30 | 1991-01-29 | 1991-07-31 | $7700.00 | Window Closed / Lapsed |