摘要
以Na2WO4.2H2O为催化剂,在体积分数为75%的乙醇中用H2O2氧化马来酸,进行了顺式环氧琥珀酸氢钠合成的实验。采用单因素和正交实验的方法考察了反应时间、反应温度、催化剂用量和反应液pH等因素对顺式环氧琥珀酸氢钠收率的影响。实验结果表明,各因素对产物收率影响的显著性顺序:反应时间>反应温度>反应液pH>催化剂用量。最佳的合成条件:马来酸11.610g,H2O2(体积分数30%)15mL,催化剂用量0.495g,反应温度65℃,反应时间3h,反应液pH为3.5。在此条件下,顺式环氧琥珀酸氢钠的收率最高可达97.8%。
Synthesis of high purity sodium hydrogen cis - epoxysuccinate,used as monomer for poly - epoxysuccinic acid,was investigated. Polyepoxysuccinic acid was a well -known water treatment green chemical. It was synthesized by epoxidation of maleic acid with hydrogen peroxide, and the synthesis was carried out in an aqueous solution containing 75% volume of alcohol and over sodium tungstate dihydrate catalyst. Effects of reaction time, reaction temperature, catalyst dosage and pH of reaction solution on yield of sodium hydrogen cis - epoxysuccinate were studied. The order of their effectivenesses to yield of target product was as follows ： reaction time 〉 reaction temperature 〉 pH of reaction solution 〉 catalyst dosage. Under the optimal reaction conditions：amount of maleic acid 11. 610 g, H2O2 （volume fraction 30% ） 15 mL, catalyst dosage 0. 495 g, pH of reaction solution 3.5, reaction temperature 65 ℃ and reaction time 3 h, yield of sodium hydrogen cis -epoxysuccinate could reach 97.8%.
出处
《石油化工》
EI
CAS
CSCD
北大核心
2006年第1期84-87,共4页
Petrochemical Technology
关键词
顺式环氧琥珀酸氢钠
钨酸钠
催化
马来酸
合成
过氧化氧
sodium hydrogen cis - epoxysuccinate
sodium tungstate
catalysis
maleic acid
synthesis
hydrogen peroxide
