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All Journal Jurnal Penelitian Saintek EKSAKTA: Journal of Sciences and Data Analysis
Winarto Haryadi
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Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Materials Science & Nanotechnology

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OPTIMIZATION CONCENTRATION OF NATRIUM HIDROKSIDA IN 2.6-BIS-(3’,4’-DIMETHOXY-BENZYLIDENE)CYCLOHEXANONE SYNTHESIS THROUGH CLAISEN-SCHMID REACTION Nurul Khotimah Putri Pertiwi; Sri Handayani; C Budimarwanti; Winarto Haryadi
Jurnal Penelitian Saintek Vol 20, No 2: Oktober 2015
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1763.027 KB) | DOI: 10.21831/jps.v20i2.9597

Abstract

This research aimed at determining the optimization concentration of NaOH as a catalyst to produce the compound 2.6-bis(3’,4’-dimethoxybenzylidene) cyclohexanone in maximum yield through Claisen-Schmidt reaction. Synthesizing of 2.6-bis-(3’,4’ dimethoxybenzylidene)cyclohexanone through Claisen-Schmidt reaction was conducted by stirring method for two hours at 10°C. Raw materials used were 3,4-dimethoxybenzaldehyde and cyclohexanone. In this research, NaOH was used as a catalyst. The solvents that used were aquades and methanol. Moles variations of NaOH which was added in the research were 0.005; 0.01; 0.02; 0.04 and 0.08 moles. The results shows that the NaOH 0.005, 0.01, 0.02, 0.04, and 0.08 mol have produce in yield, 89.56, 81.23, 107.68, 115.98, and 14.55% respectively. From the data it can be seen the optimum yield obtained at NaOH 0.04 mol.
Comparison on Isolation Technique of Vaninilin from Vanili Fruit (Vanilla planifolia Andrews Winarto Haryadi; Sri Handayani; Retno Arianingrum
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 11, ISSUE 2, August 2010
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

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Abstract

Isolation of vanilin from vanili fruit by two method; maseration and Soxhlet using ethylacetate, ethanol and chloroform solvents has been investigated. Extraction result was hydrolized using sodium hydroxide by acidification using chloride acid. Filtrate was extracted by using chloroform and the targeted vanilin was separated by evaporation. Putrification was enganged by rechrystallization using aquadest-ethanol. Elucidation to the compound structure was performed by FTIR spectrophotometer, H-NMR, C-NMR, HMQC and HMBC. It is noted that vanilin isolation by soxhletazion procedure was more effective compared to maseration. Ethylacetate was more effective solvent than chloroform and conversely ethanol is inefective for the isolation.   Keywords: vanilin isolation, soxhlet isolation, maseration  
Co-Authors C Budimarwanti Nurul Khotimah Putri Pertiwi Retno Arianingrum Sri . Handayani Sri Handayani