精细石油化工
精細石油化工
정세석유화공
SPECIALITY PETROCHEMICALS
2009年
6期
16-18
,共3页
微波辐射%三苄基没食子酸苄酯%合成%氯化苄%没食子酸
微波輻射%三芐基沒食子痠芐酯%閤成%氯化芐%沒食子痠
미파복사%삼변기몰식자산변지%합성%록화변%몰식자산
microwave radiation%benzyl chloride%gallic acid%synthesis%benzyl tris-benzylgallate
实验以没食子酸,无水碳酸钾和氯化苄为原料,无水亚硫酸钠为抗氧化剂,二甲基亚砜为溶剂,以微波辐射技术,合成三苄基没食子酸苄酯.以单因素实验法考察了反应物的摩尔比、微波功率和辐射时间等因素对收率的影响.结果表明:当n(没食子酸):n(K_2CO_3):n(氯化苄):n(Na_2SO_3)=1:4:7:1,二甲基亚砜40 mL,微波功率为500W,辐射时间为(100℃)3 min、(150℃)21 min时,三苄基没食子酸苄酯的收率为80.70%.
實驗以沒食子痠,無水碳痠鉀和氯化芐為原料,無水亞硫痠鈉為抗氧化劑,二甲基亞砜為溶劑,以微波輻射技術,閤成三芐基沒食子痠芐酯.以單因素實驗法攷察瞭反應物的摩爾比、微波功率和輻射時間等因素對收率的影響.結果錶明:噹n(沒食子痠):n(K_2CO_3):n(氯化芐):n(Na_2SO_3)=1:4:7:1,二甲基亞砜40 mL,微波功率為500W,輻射時間為(100℃)3 min、(150℃)21 min時,三芐基沒食子痠芐酯的收率為80.70%.
실험이몰식자산,무수탄산갑화록화변위원료,무수아류산납위항양화제,이갑기아풍위용제,이미파복사기술,합성삼변기몰식자산변지.이단인소실험법고찰료반응물적마이비、미파공솔화복사시간등인소대수솔적영향.결과표명:당n(몰식자산):n(K_2CO_3):n(록화변):n(Na_2SO_3)=1:4:7:1,이갑기아풍40 mL,미파공솔위500W,복사시간위(100℃)3 min、(150℃)21 min시,삼변기몰식자산변지적수솔위80.70%.
Benzyl tris-benzylgallate was synthesized from gallic acid, anhydrous potassium carbonate and benzyl chloride under microwave irradiation using anhydrous sodium sulphite as antioxidants and dimethyl sulfoxide as solvent. Structures of the reaction products were identified by melting point measurement and IR spectra. By using a single factor test, the effects of reactant ratios, microwave power and irradiation time on the product yield were studied. Under the optimal reaction conditions: n (gallic acid) : n(K_2CO_3): n(benzyl chloride): n (Na_2SO_3)=1: 4 : 7 : 1, microwave power 500 W, dimethyl sulfoxide 40 mL, irradiation time of (100 ℃) 3 rain or (150 ℃) 21 min, the yield of benzyl tris-benzylgallate reached 80.70 %.
