02505nam a2200253 a 4500 vtls000068130 KUKTEM 20251114204529.0 130117t2012 my a f m 001 0 eng d NA 201906211525 amy2 201906211517 amy2 201301171219 Fida 201301171217 Fida UMP TP245.S6 A94 2012 rs Bc. Ayesha Darawin Recovery of spent IPA by using evaporation process / Ayesha Darawin Kuantan, Pahang : UMP, 2012 xii, 45 p. : ill. (some col.) ; 30 cm. + 1 CD-ROM Project paper (Bachelor of Chemical Engineering) -- Universiti Malaysia Pahang - 2012 Bibliography : p. 40-41 Spent Isopropyl Alcohol (IPA) that not recovered must be managed as schedule waste which is quite costly and give significant impact to the environmental issues. Thus, the main objective of this research is to suggest the reuse approach for spent IPA by using simple evaporation process because the IPA is easily to vaporize. The spent IPA recovery is studied by determine the effect of operating temperature and volume of spent IPA to the evaporation process. Besides, by analyzing the concentration of precious metals in the spent IPA, it will guide further research on precious metal recovery. The spent IPA taken from an electronic company will be recovered by using rotary evaporator that is easily to be handled. In the experiments, increasing in temperature will increased the evaporation rate because more heat is transferred to the spent IPA. Therefore, the reusable IPA vapour can easily released since the kinetic energy of spent IPA molecule is also increasing. In varying the spent IPA volume, 98.3% of the spent IPA can be recovered to reusable IPA where another 1.7 % will be in concentrated residual that consists of discarded solder paste in surface mount technology process. Besides, by using atomic adsorption spectrometer, metal concentration after leaching process is 5.214 ppm of copper and 0.8213 ppm of silver. In conclusion, high percentage of spent IPA can be recovered at the optimum temperature 80 oC, and concentration of metal in the spent IPA can be determined. Thus, it is recommended for the electronic company to optimize the usage of IPA. Silver Isopropyl alcohol 0 0 0 1 10000 10000 2019-09-04 0 TP245.S6 A94 2012 rs Bc. 0000068550 2019-09-04 00:00:00 1 2019-09-04 PSM 0 0 0 1 10000 10000 2019-09-04 0 CD 6491 | TP245.S6 A94 2012 rs Bc. 0000068551 2019-09-04 00:00:00 1 2019-09-04 PSM VIRTUA40 3635 3641 VTLSSORT0010*0030*0050*0080*0200*0390*0400*0900*1000*2450*2600*3000*5020*5040*5200*6500*6501*9990*9992