Process for producing chloroprene
AssigneeDenki Kagaku Kogyo Kabushiki Kaisha, Chuo-Kenkyusho
InventorsTakao Iwasaki, Junji Hirano, Hideki Matsumura
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Abstract
Chloroprene is produced by reacting 3,4-dichlorobutene-1 with a base in the presence of thiodiphenyl amine and 2,6-di-tertiarybutyl-p-cresol and preventing clogging of the equipment. 3,4-Dichlorobutene-1 is produced by an isomerization of the reaction mixture obtained by a chlorination of excess of butadiene wherein higher boiling compounds are separated before a separation of the unreacted butadiene.
Claims6
In a process for producing chloroprene which comprises chlorinating excess of butadiene;
- separating the unreacted butadiene from the reaction mixture;
- isomerizing 1,4-dichlorobutene-2 to 3,4-dichlorobutene-1;
- reacting 3,4-dichlorobutene-1 with a base to obtain chloroprene, an improvement characterized by reacting 3,4-dichlorobutene-1 with a base in the presence of thiodiphenyl amine and 2,6-di-tertiarybutyl-p-cresol, whereby a clogging of an equipment is prevented.
In a process for producing chloroprene which comprises chlorinating excess of butadiene;
- separating the unreacted butadiene from the reaction mixture;
- isomerizing 1,4-dichlorobutene-2 to 3,4-dichlorobutene-1;
- reacting 3,4-dichlorobutene-1 with a base to obtain chloroprene, an improvement characterized by separating higher boiling compounds from the reaction mixture before the separation of the unreacted butadiene whereby a clogging of an equipment is prevented.
Dependencies are inferred from the claim text.