Process for removing mercury from production water and condensates.

摘要

The present invention relates to a process for treating a mercury-containing liquid effluent produced from a gas well, said liquid effluent comprising a mixture of an aqueous phase and liquid condensates, said process comprising the following steps:
a) providing a coagulant able to form hydrophilic aggregates with mercury-containing compounds;
b) contacting said mixture of aqueous phase and liquid condensates with said coagulant, thereby forming hydrophilic mercury-containing aggregates;
c) letting the liquid condensates separate from the aqueous phase by decantation and the mercury-containing aggregates settle within the aqueous phase;
d) recovering the aqueous phase which contains mercury-containing aggregates in one hand and the liquid condensates in the other hand;
e) separating the mercury-containing aggregates from the aqueous phase;
f) recovering the mercury-containing aggregates in one hand and the aqueous phase in the other hand,
as well as the facility thereof.