Recovery of HCl from Chloride Leach Solution of Spent HDS Catalyst by Solvent Extraction

• Authors: Raju Banda , Thi Hong Nguyen , Man Seung Lee
• Languages of publication: EN

Abstracts

EN

In the present work, amine based extractant and its mixture with cationic and solvating extractants were tested for the extraction of HCl from chloride solution containing Al(III). The chloride feed solution resulted from the leaching of spent HDS (hydro-desulfurization) catalysts. For this purpose, amine extractants, such as TOA (trioctyl amine), Alamine 336 (a mixture of tri-octyl/decyl amine), Alamine 308 (tri-isooctyl amine), and TEHA (tri 2-ethylhexyl amine) were used and the extraction and stripping behavior of HCl was compared. The extracted HCl was easily stripped from loaded TEHA phase, when compared with the other tested tertiary amine system. Solvent extraction reaction of HCl by TEHA was determined from the extraction data. Unlike TOA and Alamine 336, adding cationic extractant to TEHA had negligible effect on the extraction and stripping of HCl. In our experimental ranges, no Al was extracted by amines and pure HCl was recovered. MaCabe- Thiele diagrams for the extraction and stripping of HCl by TEHA were constructed.

Keywords

EN

HCl; extraction; stripping; recovery; TEHA

• Publisher: De Gruyter Open
• Journal: Chemical and Process Engineering
• Year: 2013
• Volume: 34
• Issue: 1
• Pages: 153-163

Dates

published

1 - 03 - 2013

online

02 - 04 - 2013

Contributors

author

Raju Banda

• Department of Advanced Material Science and Engineering, Mokpo National University, Chonnam 534-729, Korea

author

Thi Hong Nguyen

• Department of Advanced Material Science and Engineering, Mokpo National University, Chonnam 534-729, Korea

author

Man Seung Lee

• Department of Advanced Material Science and Engineering, Mokpo National University, Chonnam 534-729, Korea

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Identifiers

DOI

10.2478/cpe-2013-0013