- Synthesis technology of 1-bromine 2,2-polyvinylidene floride
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The invention discloses a synthesis technology of 1-bromine 2,2-polyvinylidene floride. The technology comprises the following steps of: (1) brominating reaction, namely with vinylidene fluoride as a raw material, carrying out brominating addition reaction on the vinylidene fluoride and bromine to generate dibromodifluoroethane; and (2) elimination reaction, namely adding alkali to generated dibromodifluoroethane for hydrogen bromide eliminating reaction to generate the 1-bromine 2,2-polyvinylidene floride through infrared light irradiation in the presence of a catalyst. The yield of the technology reaches 90% or above; the product purity is 99.5% or above.
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Paragraph 0018; 0019-0021
(2017/05/10)
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- Chlorofluoroacetylene and bromofluoroacetylene by gas phase dehalogenation of 1,1-difluoroethylenes
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Chlorofluoroacetylene and bromofluoroacetylene have been prepared by dehalogenation of dichlorodifluoroathylene and dibromodifluoroetnylene, respectively. The products of the direct dehalogenation with alkali metals as well as of the pyrolysis of trimethylstannyl compounds as "stabilized carbenoids" have been isolated in Ar matrices.
- Runge, Andreas,Sander, Wolfram W.
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p. 5453 - 5456
(2007/10/02)
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