Abstract
	Liquid  extraction is  a possible  method for  extraction of precious  metals from thiourea  solutions. This  method utilizes   perfect  contact   of  two   non-soluble  liquids, materials transfer from one  phase to another and the separation of unmiscible phases.
There is a certain organic matter for every  metal element  at which the distribution ratio is the highest. The composition of system at this case  is well-known as maximum synergistic effect.
	Presented work is  aimed  at  gold extraction  study from thiourea  solutions  with  the mixed  organic  matter (amine and organophosphate) application.
	The synthetic solution was used for experimental study of liquid extraction from thiourea solutions,  as the organic matters were used tributylphosphate  (TBP)  as  neutral organophosphate matter,  primary amine (PRIMENE JM) and n-octyl as solvent.
pH  of water  phase influence  on gold  extraction has been studied.  At pH  = 3,8  the value  of distribution ratio was relativly high 29,65.
	Maximum sinergistic effect between TBP and PRIMENE JM was achieved at mutual ratio 5 vol.% TBP, 5 vol.% PRIMENE JM and 90 vol.% n-octyl.
	Silver extraction with TBP and PRIMENE JM at pH =3,8 showed 55,85% efficiency and distribution ratio was 1,26.
	Practical experiments show that at pH = 3,8 there is an excelent gold extraction but  the extraction of iron is  very low. The highest distribution ratio for iron was 1,6.
	The experimental results  showed that mix of  5 vol.% of PRIMENE JM and 5 vol.% TBP in 90  vol.% n-octyl  is advisable for liquid extraction of gold from thiourea solutions: EAu=96%, DAu=24. Extraction of silver at the same conditions was characterized as follow: EAg=55,8%, DAg=1,26.
	The iron extraction influence on gold extraction was studied also. The experimental  results showed that at pH=3,8 when DAu=29,65,  extraction of  iron is  near to zero, what  is very advantageous in the case of selective extraction of gold.