Size-exclusion simulated moving bed for separating organophosphorus flame retardants from a polymer.
Over 500,000t of flame retardants in electronic wastes are consigned to landfills each year. A room-temperature, size-exclusion simulated moving bed (SEC-SMB) was developed to recover high purity (>99%) flame retardants with high yield (>99%). The SSWD method for ternary mixtures was developed for SEC-SMB. Fourteen decision variables were optimized to obtain the lowest separation cost within 1min. The estimated cost is less than 10% of the purchase cost of the flame retardants. The estimated cost of the optimized SEC-SMB is less than 3% of that of a conventional batch SEC processes. Fast start-up methods were developed to reduce the SMB start-up time by more than 18-fold. SEC-SMB can be an economical method for separating small molecules from polymers.
School of Chemical Engineering, Purdue University, West Lafayette, IN 47907-2100, United States.
George S
GS
Weeden
School of Chemical Engineering, Purdue University, West Lafayette, IN 47907-2100, United States.
Lei
L
Ling
School of Chemical Engineering, Purdue University, West Lafayette, IN 47907-2100, United States.
Nicholas H
NH
Soepriatna
School of Chemical Engineering, Purdue University, West Lafayette, IN 47907-2100, United States. Electronic address: wangn@ecn.purdue.edu.
Nien-Hwa Linda
NL
Wang
D002623:Chemistry Techniques, Analytical / Q000191:economics / Q000379:methods*; D002850:Chromatography, Gel; D059029:Electronic Waste; D005411:Flame Retardants / Q000302:isolation & purification*; D011108:Polymers / Q000302:isolation & purification*
D005411:Flame Retardants; D011108:Polymers
Electronic waste; Optimization; Phosphorus flame retardants; Polymer; Simulated moving bed; Size-exclusion