Priambada, Brilian Jusuf (2026) Pembuatan Asam Oksalat dari Kulit Sukun Gundul dengan Metode Peleburan Alkali. Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
This study aims to utilize breadfruit (Artocarpus altilis) peel waste as a raw material for oxalic acid production using the alkali fusion method. Breadfruit peel was selected due to its relatively high cellulose content, making it a promising feedstock for the production of value-added products. The study was conducted by varying the sodium hydroxide (NaOH) concentration at 2.0, 2.5, 3.0, 3.5, and 4.0 N and the stirring speed at 300, 400, 500, 600, and 700 rpm, while maintaining a fusion temperature of 90°C for 60 minutes. The resulting products were characterized according to the Indonesian National Standard (SNI) parameters through melting point, pH, organoleptic, functional group analyses using Fourier Transform Infrared (FTIR) spectroscopy, yield determination, and purity analysis using the acid-base titration method. The results showed that the dried breadfruit peel contained 17.14% cellulose, indicating its suitability as a raw material for oxalic acid synthesis. The synthesized product exhibited characteristics consistent with the Indonesian National Standard, including a fine white powder appearance, odorless properties, a melting point of 188–189°C, and a pH ranging from 1.18 to 1.21. FTIR analysis confirmed the presence of the characteristic functional groups of oxalic acid, namely hydroxyl (O–H), carbonyl (C=O), and C–O bonds. The oxalic acid yield increased with increasing NaOH concentration and stirring speed until the optimum condition was reached, after which it decreased at higher NaOH concentrations due to cellulose degradation. The optimum conditions were obtained at a NaOH concentration of 3.5 N and a stirring speed of 700 rpm, producing an oxalic acid yield of 63.16% with a purity of 97.88%. These findings demonstrate that the alkali fusion method is effective for producing high-quality oxalic acid from breadfruit peel waste and has considerable potential as an economically valuable approach for biomass waste utilization.
| Item Type: | Thesis (Undergraduate) | ||||||||
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| Subjects: | Q Science > QD Chemistry | ||||||||
| Divisions: | Faculty of Engineering > Departement of Chemical Engineering | ||||||||
| Depositing User: | Brilian Jusuf Priambada | ||||||||
| Date Deposited: | 01 Sep 2026 04:44 | ||||||||
| Last Modified: | 01 Sep 2026 05:16 | ||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/57850 |
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