Abstarct: Alumina production is mainly performed by Byer process. But because of shortage of bauxite resources in Iran, the producing this primary material for ceramic and aluminum industries, is carried out from nepheline syenite. The magnificent resources of nephline in Azerbayjan can be one of the reasons for producing Alumina from it. However it is necessary to consider the constructions of cement plants in order to prevent environmental pollutions. Sodium and potassium carbonates are also another by-products which can be achieved from alumina. In this work, it was tried to present an optimum and suitable method for production of Na2CO3 and K2CO3, in batch, pilot and industry scales. In order to do this, by using of Solvay and Hou process, it was resulted that the most suitable method for extracting of sodium and potassium carbonate from solution is evaporation and crystallization. During the performing of tests, it was determined that sodium and potassium carbonate can be produced in two separated products by evaporation and crystallization, after three stages of the process. Using the described process, the obtained grade for sodium carbonate and potassium carbonate was 65-70% and 55-56%, respectively. By repeating the process, this grade was obtained equal to 97.5% and 98.5%, and the resulted recovery of products was 93.53% and 93.23%, respectively.