876-86-8Relevant articles and documents
Preparation method of hexachloro-1,3-butadiene
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Paragraph 0015; 0021, (2017/08/29)
The invention provides a preparation method of hexachloro-1,3-butadiene. The preparation method has the characteristics as follows: trichlorethylene and tetrachlorethylene are used as raw materials, anhydrous metal chloride is used as a catalyst, the metal chloride can be one or more of ferric chloride, aluminum chloride and zinc chloride, a reactant is one or two of trichlorethylene and tetrachlorethylene, the molar ratio of the trichloroethylene to the tetrachlorethylene is 0:100 to 100:0, and the mass fraction of the catalyst is 1-20%. Under the condition that the reaction temperature is 50-250 DEGC, the conversion rate of the reactant is 20-80%, and the selectivity of the hexachloro-1,3-butadiene is 20-60%. The preparation method is simple in process, simple and convenient in operation, low in energy consumption and high in atom utilization rate.
Specificity and non-specificity in the sensitized CO2-laser-induced reaction of tetrachloroethene
Earl, Boyd L.,Titus, Richard L.
, p. 1593 - 1602 (2007/10/03)
Previous workers have investigated the reaction of tetrachloroethene using thermal initiation and CO2-laser initiation via sensitizing species. In both instances, the principal product was found to be hexachlorobenzene. One group reported evidence of laser specificity in this reaction, in that BCl3 acted as a sensitizer to produce hexachlorobenzene as the principal product, but SF6 and BBr3 did not. We have found that specificity is highly dependent on reaction conditions. We reproduced the previous results using similar experimental conditions, but under different conditions, we found that the specificity is lost, with all three sensitizers which we used (BCl3, SF6, and SiF4) sensitizing the reaction to produce mainly hexachlorobenzene. There were some differences among the sensitizers, as, for example, the fact that SF6 produced the most nearly pure hexachlorobenzene product.
Copper-catalyzed chlorination and condensation of acetylene and dichloroacetylene
Taylor, Philip H.,Wehrmeier, Andreas,Sidhu, Sukh S.,Lenoir, Dieter,Schramm,Kettrup
, p. 1297 - 1303 (2007/10/03)
The chlorination and condensation of acetylene at low temperatures is demonstrated using copper chlorides as chlorinated agents coated to model borosilicate surfaces. Experiments with and without both a chlorine source and borosilicate surfaces indicate the absence of gas-phase and gas-surface reactions. Chlorination and condensation occur only in the presence of the copper catalyst. C2 through C8 organic products were observed in the effluent; PCDD/F were only observed from extraction of the borosilicate surfaces. A global reaction model is proposed that is consistent with the observed product distributions. Similar experiments with dichloroacetylene indicate greater reactivity in the absence of the copper catalyst. Reaction is observed in the gas-phase and in the presence of borosilicate surfaces at low temperatures. The formation of hexachlorobenzene is only observed in the presence of a copper catalyst. PCDD/F were only observed from extraction of the borosilicate surfaces. A global reaction model is proposed for the formation of hexachlorobenzene from dichloroacetylene. (C) 2000 Elsevier Science Ltd.
