CONVERSION OIL PALM EMPTY FRUIT BUNCH BECOME POLY D,L-LACTIC ACID THROUGH ESTERIFICATION-HIDROLYSIS SEPARATION METHOD
Oil palm carries an extensive readily-to-utilize potential in various industries. As a commonly prevalent solid waste in oil palm industries, Oil Palm Empty Fruit Bunch (OPEFB) can prospectively be re-capitalized as a raw material to produce lactic acid through catalytic chemical reaction. Lactic ac...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/21022 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Oil palm carries an extensive readily-to-utilize potential in various industries. As a commonly prevalent solid waste in oil palm industries, Oil Palm Empty Fruit Bunch (OPEFB) can prospectively be re-capitalized as a raw material to produce lactic acid through catalytic chemical reaction. Lactic acid serves to become a vital starting source to produce Poly-D,L-Lactic Acid (PDLLA). To be used as PDLLA, then lactic acid which once must have high purity. Thus, one important stage of the conversion process of OPEFB to PDLLA is the purification stage. <br />
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The general objective is to produce PDLLA from OPEFB through esterification-hydrolysis purification method. OPEFB chopped with different size ranging from 30 - 60 mesh was introduced into reactor as feed. Principally, the research methodology can be broken down into four primary stages: (1) pretreatment process of OPEFB with alkaline hydrothermal method; (2) lactic acid production process through catalytic reaction; (3) purification of lactic acid by esterification-hydrolysis method; and (4) production of PDLLA through a direct poly-condensation process. This research puts much emphasis upon the mass balance of OPEFB conversion process into PDLLA. <br />
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The results show that alkaline hydrothermal can improve the cellulose content up to 46.41%-m/m. The highest lactate acid yield in the catalytic reaction was obtained using 0.026 M concentration of PbCl2 catalyst, with a yield attaining 89.45%-m/m. At the end of the purification process, lactic acid product with concentration of 73.36%-m/m was produced, leaving Pb2+ content at a level of 3.29 ppm. Ultimately, the yield of lactic acid at end of purification process was 65.01%-m/m, whereas the yield of PDLLA at the end of the direct poly-condensation process is 7.96%-m/m. The obtained PDLLA has a molecular weight of 76,489 grams/mol. <br />
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