Abstract
	At the present time  there are several methods (cementation, electrolytical  precipitation, adsorption  on active carbon, ion sorption  and liquid extraction)  for gold precipitation from thiourea solutions.
	Present paper  is aimed at gold  precipitation from thiourea solutions study  by diethylhexyl phosphoric  acid (DEHPA) and tributylphosphate (TBP).
	Synthetic  solution  as  well  as  real  thiourea leachate solution  has been  used to  study the  liquid extraction  of precious   metals   from   acidic   thiourea  solutions produced by Hodrusa's concentrate leaching.
	Experimental results showed the extraction of gold by DEHPA as possible, distribution ratio  attained values from 0,102 to 5,24.  Maximum value was  achieved at 50  vol.% DEHPA and 50 vol.% benzene.
	The maximum distribution  ratio for TBP was 1,74  at the  same conditions. The additional extraction of organic matter in organic phase is  capable to increase distribution  ratio. There are  definite  mixed  organic  matters  for  every  metals element when distribution ratio  has the maximum  value - maximum synergistic effect.
	DEHPA  and  TBP were used for investigation of maximum synergistic effect in  different  ratios.  Maximum synergistic effect  of 36,5 was achieved at ratio DEHPA : TBP = 1 : 1.
	Reverse extraction (stripping) by HCl was studied, the best molarity concentration was specified as 2 M HCl.	Following experiments showed that the best experimental extraction results were achieved at ratio organic vs. aquatic phases O : A = 1 : 1.
	The maximum distribution ratio  achieved with the real Hodrusa's concentrate was 8,54.
Presented experimental work was  aimed at study of influence of different factors on gold extraction from thiourea solutions and it contains results in the several spheres:
The  selection of advisable ratio  between DEHPA and TBP, to achieve  the maximum synergistic effect.
The study  of extraction of  gold by the mix  organic matter with different ratio of two phases volumes (organic vs. aquatic).
The composition of  organic  phase  influence study  on gold extraction from thiourea solutions.