[en] To avert excessive sulfuric acid exhaustion in the classical leaching procedure and to avoid leaching of other undesirable impurities, proper alkaline leaching has been achieved for dolostone of Gabal Allouga, South western Sinai, Egypt. The relevant factors for alkaline leaching of a technological sample assaying 1.2% Cu and 0.15% U were examined using a mixture of Na₂CO₃/(NH₄)HCO₃ solution upon two samples namely; roasted sample at 540 ° C and raw materials un-roasted. The leaching kinetic results showed that the leaching procedure of uranium and copper from dolostoneis controlled by shrinking core kinetic model 1-2/3(X)−(1−X)^2/3=k_dt