DE436999C - Process for the production of chlorine derivatives of ethane - Google Patents

Description

Process for the production of chlorine derivatives of ethane. It was found that ethane can be chlorinated in an excellent way if ethane is used or ethane-containing gases in the presence of catalysts, expediently active charcoal, treated with chlorine. Ethyl chloride, i # i-dichloro- and i - i - i-trichloroethane are obtained in changing proportions; in addition, there are sometimes also more highly chlorinated ones Etbanderivate to a small extent.

One has already made of ethane by treatment with chlorine at 300 to 55o ° a product consisting essentially of ethyl chloride obtained, but without a catalyst and using a considerable excess of ethane. The chlorination of methane in the presence of a catalyst, e.g. B. active charcoal or active silica, This is possible without a large excess of ethane and at much lower temperatures to work, a fact that is not only due to the thermal sensitivity of the Ethans and its chlorination products, but especially because of the work with chlorine and gaseous hydrochloric acid existing difficulties in the matter of materials is of great benefit. According to the invention, too, one works with the choice of suitable working conditions smoothly obtained products consisting essentially of ethyl chloride. It is known to produce chlorine derivatives of methane by chlorinating methane in the presence of catalysts. But it has been shown that at the chlorine ation the conditions of ethane have to be met that are significantly different from those of chlorination of methane. While for methane reaction temperatures of -33o to 8oo ° are required are, the chlorination of the ethane takes place according to the new process already with the surprisingly low temperatures of 100 to 300 °. In the chlorination of methane a very large excess of methane must also be used if one is low wants to receive chlorinated products. Also this measure that the execution of the reaction difficult, is not necessary to the same extent in the present method.

Is the ethane, as in many cases, so z. B. in extraction from coal distillation gases, in a mixture with ethylene, it is expedient to use that To hydrogenate ethylene beforehand in a manner known per se and then the ethylene-free Treat the gas with chlorine in the manner indicated. Example i, a mixture of the same Parts of the volume of ethane and chlorine are mixed with active charcoal heated to about 100 to 300 degrees directed. = Ulan receives about equal amounts of ethyl chloride and i # i-Dichloroethane, besides, to a lesser extent, higher chlorination products, among these r # i - i-trichloroethane. The products are produced in a known manner from the outgoing Gases containing unaffected ethane and hydrogen chloride are separated.

. Example 2.

That from an active carbon treated with coal gas by expelling it Gas mixture obtained, consisting essentially of 4thylen, less ethane, deneben sometimes also other gases, with a corresponding to the ethylene content Amount of hydrogen hydrogenated. The gas is increased with the addition of one part of the volume of chlorine i1 / 2 parts of the volume of ethane passed over heated active charcoal. Essentially, one obtains Ethyl chloride, next to it less i - i-dichloroethane and only very small amounts of higher Chlorination products.

Other catalysts, e.g. B. active silica, use.

Claims (2)

PATENT CLAIMS: i. Process for the production of chlorine derivatives of ethane, characterized in that ethane is used by itself or in mixtures Use of catalysts, advantageously active charcoal, treated with chlorine. 2. Embodiment of the method according to claim i, characterized in that one when using a gas mixture containing ethylene and ethane, the ethylene beforehand converted into ethane in a manner known per se.