Resumo

DU, C.H  e  LIU, J.R. A new utilization approach of natural soda ash: to manufacture sodium percarbonate. Lat. Am. appl. res. [online]. 2014, vol.44, n.2, pp.179-183. ISSN 0327-0793.

Until now, natural soda ash ore is only used for manufacturing sodium carbonate and other common chemicals. As a fine chemical, the traditional method of sodium percarbonate takes sodium carbonate and hydrogen peroxide as raw materials. The primary goal of the present research is to explore a holistic route to manufacture sodium percarbonate from natural soda ash. The integrated approach avoids the operations of deep evaporation and calcination in the traditional manufacture process of sodium carbonate from natural soda ash. It also avoids the dissolution of merchandise sodium carbonate and any addition of salting-out agents in the production of sodium percarbonate. Taking Chagannuoer natural soda ash as raw material, the operating conditions were optimized by means of an orthogonal design L₃₂(4⁹). The results indicate that the availability ratios of H₂O₂ and Na₂CO₃ are higher than 75% and 81% respectively under optimal conditions. The IR and XRD characterizations denote that the major component of the prepared product is Na₂CO₃·1.5H₂O₂. The research provides a case study for processes integration, and possibly contributes to the investigation of utilizing other natural resources.

Palavras-chave : Natural Soda Ash; Sodium Percarbonate; Process Integration; Multi-index Orthogonal Design; Natural Resource.

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