| dc.description.abstract | Synthesis of cardanyl methyl ether was carried out through an etherification
reaction between cardanol isolated from cashew seed shell extract (CNSL) and methyl
iodide. Cardanol isolation was carried out by adding acetone, Ca(OH)2 , 25%
NH4OH, n-hexane: ethyl acetate (98:2), washing with 2.5% NaOH, 5% HCl, distilled
water, and anhydrous Na2SO4. The yield of cardanol obtained was 74.39 g (74.39%
of the initial weight of CNSL) and had the following characteristics: acid number
1.2863 mgKOH/g, iodine number 215.6535 g I2/100 g, viscosity 38.7 cP , density
0.8266 g/mL, pH = 6.14. The FT-IR spectrophotometer showed the formation of
cardanyl methyl ether which was characterized by a decrease in the absorption
intensity of the -OH group at wave numbers around 3000-3400 cm-1
. The FT-IR
spectrum of cardanyl methyl ether shows an absorption band at 1162.9-1259.8 cm-1
indicating the C-O stretching group, at wave numbers 1043.6-1148.0 cm-1
indicating
the formation of asymmetrical and symmetrical C-O-C stretching groups of the
compound ether, but there was an increase in the intensity of C-O-C at various molar
ratios of cardanol: methyl iodide (1:1,5), this was thought to originate from the
presence of -OH groups present in other compounds that might be methylated during
the synthesis process.Cardanyl methyl ether was synthesized by adding K2CO3,
acetone and methyl iodide with a reflux time of 8 hours. The parameters used in this
study were molar variations of cardanol: methyl iodide (1:1.5 ; 1:3 ; and 1:4.5) and
yielded 3.555 g; 12.084 g; 11.472 g cardanyl methyl ether. The obtained cardanyl
methyl ether was analyzed by FT-IR spectrophotometer and GC-MS. The results of
cardanol analysis with GC-MS obtained 63.28%, and the results of cardanyl methyl
ether analysis with various molar ratios of cardanol: methyl iodide (1:1.5 ; 1:3 ; 1:4.5)
with GC-MS obtained of 3.05%, 30.29% and 26.58%. These results indicate that the
maximum percentage of cardanyl methyl ether was obtained under the reaction
conditions of various molar ratios of cardanol: methyl iodide (1:3), 17.3 grams of
K2CO3, 50 mL of acetone, and a reflux time of 8 hours. | en_US |
