US6380446B1
Expired / Lapsed
US
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Process for dehydrohalogenation of halogenated compounds
Assignee: EIDP Inc
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Filing: 2001-03-07
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Granted: 2002-04-30
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Expires: 2021-03-07
Abstract
Abstract Halogenated compounds are dehydrohalogenated in a multi-stage bubble reactor wherein agitation of the reactor contents is provided by in situ generation and vaporization of reaction product having a boiling point lower than that of the reactants.
Inventors
- 👤 David William Drew
- 👤 Terry Wayne Redwine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:55
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/25; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
135 words
A process for dehydrohalogenation of a halogenated compound selected from the group consisting of halogenated alkanes and halogenated alkenes, said process comprising A) contacting a first composition comprising said halogenated compound with a second composition comprising a base having a K b of at least 10 −9 , in the liquid phase, in a reactor having multiple stages, at a temperature sufficient to initiate the exothermic reaction of said halogenated compound with said base, thereby forming a dehydrohalogenated compound having a boiling point lower than that of said halogenated compound; and B) maintaining the temperature of the reactor contents at a temperature sufficient to vaporize said dehydrohalogenated compound, thereby causing agitation of said reactor contents and transfer of vaporized dehydrohalogenated compound through said multiple stages of said reactor, said vaporization providing a means of agitation.
Claim 2
Dependent Claim
135 words
A process for dehydrohalogenation of a halogenated compound selected from the group consisting of halogenated alkanes and halogenated alkenes, said process comprising A) contacting a first composition comprising said halogenated compound with a second composition comprising a base having a K b of at least 10 −9 , in the liquid phase, in a reactor having multiple stages, at a temperature sufficient to initiate the exothermic reaction of said halogenated compound with said base, thereby forming a dehydrohalogenated compound having a boiling point lower than that of said halogenated compound; and B) maintaining the temperature of the reactor contents at a temperature sufficient to vaporize said dehydrohalogenated compound, thereby causing agitation of said reactor contents and transfer of vaporized dehydrohalogenated compound through said multiple stages of said reactor, said vaporization providing a means of agitation.
Claim 3
Dependent Claim
17 words
A process of claim 1 wherein said first composition and said second composition comprise two immiscible liquids.
Claim 4
Dependent Claim
20 words
A process of claim 1 wherein said first composition comprises a solution of a halogenated compound in an organic solvent.
Claim 5
Dependent Claim
21 words
A process of claim 1 wherein said halogenated compound is a liquid and said base is present as an aqueous solution.
Claim 6
Dependent Claim
21 words
A process of claim 1 wherein said halogenated compound is selected from the group consisting of chlorinated alkanes and chlorinated alkenes.
Claim 7
Dependent Claim
21 words
A process of claim 1 wherein said halogenated compound is selected from the group consisting of brominated alkanes and brominated alkenes.
Claim 8
Dependent Claim
21 words
A process of claim 1 wherein said halogenated compound is selected from the group consisting of iodinated alkanes and iodinated alkenes.
Claim 9
Dependent Claim
21 words
A process of claim 1 wherein said halogenated compound is selected from the group consisting of fluorinated alkanes and fluorinated alkenes.
Claim 10
Dependent Claim
12 words
A process of claim 1 wherein said reactor is a vertical column.
Claim 11
Dependent Claim
17 words
A process of claim 1 wherein the reaction takes place in a series of continuous distinct vessels.
Claim 12
Dependent Claim
11 words
A process of claim 1 wherein said base is sodium hydroxide.
Claim 13
Dependent Claim
13 words
A process of claim 1 wherein said dehydrohalogenated compound is a chlorinated butadiene.
Claim 14
Dependent Claim
13 words
A process of claim 1 wherein said halogenated compound is a chlorinated butene.
Claim 15
Dependent Claim
17 words
A process of claim 1 wherein heat is supplied to said reactor to initiate the dehydrohalogenation reaction.
Claim 16
Dependent Claim
20 words
A process of claim 1 wherein said first and second compositions are mixed together and then fed to said reactor.
Claim 17
Dependent Claim
26 words
A process of claim 15 wherein said first and second compositions are mixed together in a high shear mixing device and then fed to said reactor.
Claim 18
Dependent Claim
14 words
A process of claim 1 wherein said second composition additionally comprises a dehydrohalogenation catalyst.
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