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1611312 
Journal Article 
Distillation-Adsorption Hybrid Processes to Separate Binary Liquid Mixtures with Homogeneous Azeotrope 
Sharma, PK; Wankat, PC 
2013 
1 
Separation Science and Technology
ISSN: 0149-6395
EISSN: 1520-5754 
48 
1 
1-14 
WOS:000316377200001 
Isopropanol (IPA) is a major solvent in the semiconductor
industry. During production, IPA is often obtained as an aqueous mixture that forms an azeotrope.
Azeotropic distillation, commonly used to separate the azeotrope, has high energy requirements.
The current work explores hybrid processes pairing distillation with temperature swing adsorption
(TSA) (with activated carbon) or with pressure vacuum swing adsorption (PVSA) (with 3A zeolite).
The feed was 10mol% IPA and target purity was 99.9999 mole%. Optimized distillation/adsorption
hybrid schemes were compared to optimized azeotropic distillation. On the basis of total yearly
costs, distillation-PVSA was found to be the most economical scheme followed by azeotropic
distillation and then distillation-TSA. 
adsorption; azeotrope; distillation; isopropanol; zeolite