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季戊四醇双缩醛(酮)的合成

时间:2020-01-06 19:32来源:毕业论文
以乙腈为溶剂,不经分水,使原料季戊四醇和苯甲醛溶解在均相中反应,产物在冷溶液中折出,大大简化了后处理。研究表明, 季戊四醇双缩苯甲醛的最佳工艺条件为:以氨基磺酸为

摘要:本论文研究的新点是,以乙腈为溶剂,不经分水,使原料季戊四醇和苯甲醛溶解在均相中反应,产物在冷溶液中折出,大大简化了后处理。研究表明,    季戊四醇双缩苯甲醛的最佳工艺条件为:以氨基磺酸为催化剂,用量0.8g;反应时间3h;季戊四醇:苯甲醛=1:2.4,在此条件下,产物收率可达80.3%。产物结构通过红外光谱、核磁共振光谱进行了表征。43670

毕业论文关键词:季戊四醇;苯甲醛;双缩;乙腈;氨基磺酸

Synthesis of Pentaerythritol double benzaldehyde

Abstract: The new point of this paper is to acetonitrile as the solvent, without separation water treatment, the raw material pentaerythritol and benzaldehyde were dissolved in a homogeneous solution and the reaction product will precipitate in cold solution .All of this can greatly simplify the post-processing. Experiments show that the optimum conditions of the synthesis: the sulfamic acid as catalyst, the amount of 0.8g; reaction time 3h; pentaerythritol: benzaldehyde = 1: 2.4. Under these conditions, the yield can up to 80.3%.Condensation product structure by IR specttum and HNMR to characterize.

Key Words: Pentaerythritol; benzaldehyde; condensation; acetonitrile; sulfamic acid

目录

1、前言 1

1.1 开题依据 1

1.2. 季戊四醇缩醛(酮)的研究状况 2

1.2.1以硫酸为催化剂进行双缩 2

1.2.2以对甲苯磺酸为催化剂,环己烷为带水剂进行双缩 2

 1.2.3以对甲苯磺酸为催化剂,苯为带水剂进行双缩 3

1.2.4以对甲苯磺酸为催化剂,环己烷为带水剂进行双缩 3

1.2.5以硫酸铝钾为催化剂,在微波辐射无溶剂条件下进行双缩 3

1.2.6以硫酸氢铵为催化剂,在微波照射无溶剂条件下进行双缩 3

 1.2.7以杂多酸为催化剂,苯为带水剂情况下进行单缩 3

1.2.8杂以S2082-/Sn02-Si02固体超强酸为催化剂,苯为带水剂情况下双缩.........4

1.2.9以活性炭负载碘为催化剂,甲苯为带水剂情况下进行双缩 4

 1.2.10以活性炭负载四氯化锡为催化剂,利用微波辐射法进行双缩 4

1.2.11以杂多酸-聚合物复合膜为催化剂,环己烷为带水剂进行双缩 5

1.2.12以稀土Ce4+复合钛基固体酸为催化剂,环己烷为带水剂进行双缩................5

    1.2.13以活性炭负载磷钨酸为催化剂,以苯为溶剂进行缩合.....................................5

        1.2.14以硫酸锆-硅胶为催化剂,利用微波辐射法进行双缩…………………………6

1.2.15以硫酸铝为催化剂,在微波辐射无溶剂情况下进行双缩……………………..6

1.2.16以SO42-/TiO2-SnO2固体超强酸为催化剂,无溶剂条件下进行双缩……….6

1.2.17以硫酸氢钾为催化剂,无溶剂微波辐射条件下进行双缩……………………..7

1.2.18以脱铝超稳Y沸石(简称DUSY)为催化剂,有溶剂条件下进行双缩………..7

1.2.19以可膨胀石墨为催化剂,甲苯为脱水剂进行缩合……………………………..7 季戊四醇双缩醛(酮)的合成:http://www.751com.cn/huaxue/lunwen_44622.html

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