Continuous prodn. of sodium hydrosulphide

摘要

Method comprises maintaining the aq. prod. soln. resulting from reaction of gaseous H2S and aq. sodium sulphide soln. in unvented conditions while keeping a source of H2S contg. more than 5% of unsensitive gas in pressure demand relation with the soln.. Aq. sodium sulphide soln. is continuously introduced and the soln. is periodically vented to purge accumulated gases which do not vent with the soln.. - The H2S is pref. 99.5% pure. (0/0)