Quaternary ammonium salts have been synthesized from piperidine and alkenyl halides (4-chloropent-2-ene, 2-methyl-3-chlorobut-1-ene, 3-methyl-3-chlorobut-1-ene), and their structure has been confirmed. The optimal synthesis conditions have determined, and the product compounds have been to serve as efficient bactericides against sulfate-reducing bacteria.