本文選題：N-羥基鄰苯二甲酰亞胺(NHPI) + 催化氧化��； 參考：《精細(xì)化工》2017年12期

【摘要】：以芐基苯基醚為模型分子,氧氣為氧化劑,考察了N-羥基鄰苯二甲酰亞胺(NHPI)對(duì)分子氧氧化木質(zhì)素醚鍵(α-O-4)的催化作用和多種可溶性過渡金屬鹽的助催化作用,探究了NHPI和硝酸銅用量、反應(yīng)溫度、反應(yīng)時(shí)間和氧氣分壓對(duì)反應(yīng)的影響。結(jié)果表明:NHPI催化分子氧氧化芐基苯基醚生成苯甲醛和苯酚,在可溶性的鈷、錳、鎳和銅鹽中,銅鹽對(duì)NHPI的助催化作用最好。在NHPI/Cu(NO3)2催化下,當(dāng)氧分壓高于0.5 MPa時(shí),芐基苯基醚的氧化反應(yīng)對(duì)氧氣為0級(jí)。過高溫度會(huì)加劇目標(biāo)產(chǎn)物苯甲醛和苯酚的深度氧化。優(yōu)化的工藝條件為,以乙酸為溶劑,n(芐基苯基醚)∶n(NHPI)∶n(硝酸銅)=1.0∶0.2∶0.02,氧氣分壓為1.0 MPa時(shí),在110℃下反應(yīng)15h,芐基苯基醚的轉(zhuǎn)化率為37.2%。
[Abstract]:Using benzyl phenyl ether as model molecule and oxygen as oxidant, the catalytic effects of N-hydroxyphthalimide (NHPI) on molecular oxygen oxidation of lignin ether bond (偽 -O-4) and various soluble transition metal salts were investigated. The effects of the amount of NHPI and copper nitrate, reaction temperature, reaction time and partial pressure of oxygen on the reaction were investigated. The results show that the molecular oxygen oxidizes benzyl phenyl ether to benzaldehyde and phenol. Among the soluble cobalt, manganese, nickel and copper salts, copper salts have the best catalytic effect on NHPI. Under the catalysis of NHPI/Cu(NO3)2, when the partial pressure of oxygen is higher than 0.5 MPa, the oxidation reaction of benzyl phenyl ether to oxygen is of 0 order. Excessive temperature will aggravate the deep oxidation of benzaldehyde and phenol. The optimum technological conditions were as follows: when acetic acid was used as solvent, benzyl phenyl ether (benzyl phenyl ether) was used as solvent, the conversion rate of benzyl phenyl ether was 37.2 when the reaction was carried out at 110 鈩，

本文編號(hào)：1894814