Correct spelling for the English word "Conservant" is [kənsˈɜːvənt], [kənsˈɜːvənt], [k_ə_n_s_ˈɜː_v_ə_n_t] (IPA phonetic alphabet).
Preserving; having the power of preserving from decay.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.