ISSN Print: 2381-1153  ISSN Online: 2381-1161
American Journal of Environmental Engineering and Science  
Manuscript Information
 
 
Sodium Sulfate Production from Sulfidic Spent Caustic
American Journal of Environmental Engineering and Science
Vol.5 , No. 4, Publication Date: Sep. 20, 2018, Page: 77-84
578 Views Since September 20, 2018, 449 Downloads Since Sep. 20, 2018
 
 
Authors
 
[1]    

Seyed Reza Hashemi, Science and Research Branch, Islamic Azad University, Tehran, Iran.

[2]    

Amir Heidarinasab, Department of Chemical Engineering Science and Research Branch, Islamic Azad University, Tehran, Iran.

 
Abstract
 

Sodium sulfate is produced from naturally occurring brine or crystalline mineral sources and as a product from various chemical processes. These processes for sodium sulfate production are all costly but for first time we would like to introduce a new chemical process from LPG (Liquefied Petroleum Gas) process waste called sulfidic spent caustic, on the other hand spent caustic is known as one of the most hazardous waste, by using this method this waste from LPG Units can be considered as a valuable raw material in a very economical process to produce sodium sulfate with high quality confirmed by X-Ray Fluorescence (XRF) and X-Ray Diffraction (XRD) tests. This process is not only inexpensive for producing a valuable industrial salt but also it comes from a waste that its treatment was very costly and difficult according to its refractory pollutant. The waste also could be treated much easier as a majority of sulfide Ions turn to sulfate.


Keywords
 

Desulfurization, LPG Process, Sodium Sulfate, Spent Caustic, Neutralization


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