欢迎来到天天文库
浏览记录
ID:35187530
大小:1.22 MB
页数:49页
时间:2019-03-21
《试析新戊二醇合成的研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、浙江大学硕士学位论文新戊二醇合成的研究姓名:章意坚申请学位级别:硕士专业:化学工艺指导教师:吕秀阳20060501灏江大学琰±学位论文摘要新戊二醇具有广泛的_}}!『选,它可用于生产聚醋、聚氨酯泡沫塑料和弹性体的增塑剂、商凝润滑油款添搬荆、醇酸搪黪、耐火塑料、彖擞剌、除草裁、g
2、发剂帮萃敷荆等:也可_}}l予麓烃和环烷烃的选择分离。箕衙生物广泛嗣予汽车、纺织、医药、涂料、塑料稚l石漓等领域。随着我国新戊二醇新装置的投产殿其应用开发的不断深入,其臌用领域将会避一步得到拓展。薪戊二醇是蠢甲醛和嚣了醚金我的二醇类躲旗,首先是掣避鞠舅丁醛发生羟醛壤台反褒嫩成羟基特戊醛,然
3、后进一步躐甲醛发生交叉坎尼扎罗(Cannizzaro))夏应,被还原为新戊二醇。我们通过进行~系列正交蜜验,优化了各步反应的工艺条件,进一步提黼反应的选择性翻转让率。羟醛缩合反成采用有机胺类催化莉如三乙胺,其用量为在反应液中浓度为5%,反应温度谯70—75℃,甲醚与异j一醛的tool配比为1.2时,反应的选择性>96.8%,收率》96%。裴整扎罗反旋在荦醛与羟蒸茂醛戆mol酝辩为1.2,爱痤溢发:30-404C,爱廑渣躲pH>ll的条件下反应,产品后处理采用商沸点溶剂精馏法,收率>94%,产品纯度>98蹦,mp:122.1234C关键弱:薪戊:=醇,平醛,黪丁醛,
4、羟醛缀合反应,坎燕藐罗反应11I浙江大学硕士学位论文ABSTRACTNeopentylglycolhasbeenwidelyusedasplasticizerforproducingpolyesterandpolyurethanefoamedplastic,additiveforadvancedlubricant,alkydresin,refractorymaterial,insecticide,weedicide,initiator,extractingagentandseparatingmediumfortheseparationofareneandcycla
5、nesThederivativesofneopentylglycolareappliedextensivelyinautomobile,spin,medicament,painting,plasticandpetroleumfield.Withthenationalnewapparatusforproducingneopentyglycolputtingintoproductionanddeepdevelopment,theapplyingfieldwillexpandedlargelyNeopentylglycolisaglycol,whichwassynthe
6、sizedfromformaldehydeandisobutylaldehyde.Themechanismisasfollows:firstly,formaldehydeandisobutylaldehydereactedintopentaldolbyaldolcondensation,andthenformedneopentylglycolbytheCannizzaroreaction.Thisresearchoptimizedtheprocessconditionsforthesynthesisofneopentylglycolbyaserialofortho
7、gonalexpefimentsandimprovedtheselectivityandconversionAmine,forexample,triethylamine,wasusedasthecatalystforthealdolcondensation.Whentheamineconcentrationis5%.reactiontemperatureis70—75。Candthemoleratioofformaldehydeandisobutylaldehydeis1.2.thereactionselectivityisabove96.8%andtheyiel
8、disabove96%AndforCannizzaroreaction,whenthemoleratioofformaldehydeandpentaldolis1.2,reactiontemperatureis30-40"C,thepHofreactionsolutioniscontrolledover11,thenthecrudeproductistreatedbydistillationusinghighboilingpointsolvent,theyieldisabove94%,thepurityofproductisabove98%,andthemeltp
9、ointo
此文档下载收益归作者所有