Process for producing 1,2,3,4-tetrachlorobutane
There is provided a method of producing 1,2,3,4-tetrachlorobutane capable of stably and economically producing 1,2,3,4-tetrachlorobutane. A reactant solution ( 1 ) containing 3,4-dichloro-1-butene is charged in a reaction vessel ( 11 ) having an inner surface, to be brought into contact with the reactant solution ( 1 ), made of a metal and a chlorine gas is introduced into the reactant solution ( 1 ) to perform a reaction between 3,4-dichloro-1-butene and the chlorine gas to produce 1,2,3,4-tetrachlorobutane. The reaction is performed while carrying out an operation of taking out at least a portion of the reactant solution ( 1 ) from the reaction vessel ( 11 ), filtering the reactant solution ( 1 ) thus taken out to remove a solid matter, and returning the filtered reactant solution ( 1 ) into the reaction vessel ( 11 ).
1. A process for producing 1,2,3,4-tetrachlorobutane by charging a reactant solution containing 3,4-dichloro-1-butene in a reaction vessel having an inner surface made of a metal, to be brought into contact with the reactant solution and introducing a chlorine gas into the reactant solution to cause a reaction between the 3,4-dichloro-1-butene and the chlorine gas, the process comprising performing the reaction while taking out at least a portion of the reactant solution from the reaction vessel, filtering the portion to remove a solid matter, and returning the filtered reactant solution to the reaction vessel.
2. The process for producing 1,2,3,4-tetrachlorobutane according to claim 1 , wherein the metal is at least one selected from iron, iron alloys, nickel, nickel alloys, and tantalum.
3. The process for producing 1,2,3,4-tetrachlorobutane according to claim 1 , wherein the inner surface of the reaction vessel is subjected to at least one of polishing treatment and acid cleaning treatment.
4. The process for producing 1,2,3,4-tetrachlorobutane according to claim 1 , wherein the reactant solution is a solution obtained by dissolving the 3,4-dichloro-1-butene in a solvent and the solvent is at least one of 1,2,3,4-tetrachloro-1,1,2,3,4,4-hexafluorobutane and carbon tetrachloride.
5. The process for producing 1,2,3,4-tetrachlorobutane according to claim 2 , wherein the inner surface of the reaction vessel is subjected to at least one of polishing treatment and acid cleaning treatment.
6. The process for producing 1,2,3,4-tetrachlorobutane according to claim 2 , wherein the reactant solution is a solution obtained by dissolving the 3,4-dichloro-1-butene in a solvent and the solvent is at least one of 1,2,3,4-tetrachloro-1,1,2,3,4,4-hexafluorobutane and carbon tetrachloride.
7. The process for producing 1,2,3,4-tetrachlorobutane according to claim 3 , wherein the reactant solution is a solution obtained by dissolving the 3,4-dichloro-1-butene in a solvent and the solvent is at least one of 1,2,3,4-tetrachloro-1,1,2,3,4,4-hexafluorobutane and carbon tetrachloride.
8. The process for producing 1,2,3,4-tetrachlorobutane according to claim 1 , wherein the reaction vessel has a stirrer equipped with a stirring blade for stirring the reactant solution.
9. The process for producing 1,2,3,4-tetrachlorobutane according to claim 1 , wherein the filtering is with a filter made of a filter material selected from the group consisting of (i) a filter cloth made of glass fiber or a synthetic fiber, wherein the synthetic fiber is polyester, polyamide, polyolefin, aramid, acrylic resin, fluorine resin, polyphenylene sulfide, or polyimide, and (ii) a sintered metal.