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缩醛化

缩醛化的相关文献在1986年到2022年内共计125篇,主要集中在化学工业、化学、轻工业、手工业 等领域,其中期刊论文89篇、会议论文1篇、专利文献585451篇;相关期刊58种,包括东华大学学报(自然科学版)、湖北师范学院学报(自然科学版)、林产化学与工业等; 相关会议1种,包括中国化工学会2003年石油化工学术年会等;缩醛化的相关文献由250位作者贡献,包括杨水金、白爱民、高飞等。

缩醛化—发文量

期刊论文>

论文:89 占比:0.02%

会议论文>

论文:1 占比:0.00%

专利文献>

论文:585451 占比:99.98%

总计:585541篇

缩醛化—发文趋势图

缩醛化

-研究学者

  • 杨水金
  • 白爱民
  • 高飞
  • 余协卿
  • 吕宝兰
  • 夏佳
  • 孙聚堂
  • 李谦和
  • 魏坤
  • 许为康
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 杨妲; 张龙力; 刘欢; 杨朝合
    • 摘要: 通过对双齿膦配体的单P原子定向甲基化,合成了两种离子型"叔膦-季鏻鎓Lewis酸"双功能配体L2和L3,该类双功能配体分子结构中既含有与过渡金属配位的叔膦基团,又含有具Lewis酸的季鏻鎓基团.研究结果表明,在合成气的体积比(CO/H2)为4∶1时,双功能配体L2修饰的[Ir(COD)Cl]2催化剂高效催化烯烃的"氢甲酰化-缩醛化"串联反应,1-辛烯的转化率为98%,缩醛的选择性高达86%,其催化活性好于同等条件下的Rh催化剂.双功能配体L2与[Ir(COD)Cl]2原位构建的共催化体系的催化效果远优于Ir(I)配合物和季鏻鎓Lewis酸的物理混合;同时还表现出较好的底物普适性.此外,由于双功能配体L2的高极性,其修饰的Ir催化剂可以顺利实现与正己烷溶液的分离,从而实现催化剂的回收循环使用.
    • 刘亮亮; 冯乙巳; 徐卓玮; 许华建
    • 摘要: The acetalization reaction of different kinds of aliphatic aldehydes or aromatic aldehydes with short chain monohydric alcohols and diols was achieved under mild conditions catalyzed by the al-cohol-soluble Eosin Y. The yield of acetal compounds were 58% ~99% after reaction for 24 h at room temperature. The structures were confirmed by 1 H NMR, 13 C NMR and HR-MS.%以醇溶性曙红为催化剂,在温和条件下高效催化缩醛化反应,该催化体系适应于不同种类的脂肪醛或芳香醛与短链一元醇或二元醇的羰醇缩合反应,于室温反应24 h,缩醛化产物收率58%~99%,其结构经1 H NMR,13 C NMR和HR-MS确证。
    • 魏月华; 蒋军民
    • 摘要: 甘油具有三个羟基官能团,赋予了它会进行多种反应.文章重点介绍了甘油酯化反应的催化剂,指出了其优缺点,并简单介绍了利用甘油制甘油缩醛、甘油碳酸酯、聚甘油、甘油酸和二羟基丙酮的催化剂的研究现状.
    • 程欲晓; 周宇艳; 张继东; 费旭东; 马腾洲; 梁学正
    • 摘要: The novel solid acid with both sulfonic and carbonyl acid groups has been synthesized from 3-((2-sulfoethoxy) carbonyl)acrylic acid and tetraethyl orthosilicate(TEOS). The catalytic activities were investigated through the acetalization. The results showed that the novel solid acid was very efficient for the reactions with the high yields. The high acidity, high stability and reusability were the key feature of the novel solid acid. Moreover, the sulfonic and carbonyl acid groups could cooperate during the catalytic process, which improved its catalytic activities. The catalyst shows recyclability, and hold great potential for replacement of homogeneous catalysts.
    • 王俏; 张玉琦; 魏清勃
    • 摘要: The benzaldehyde ethylene glycol acetal was synthesized from benzaldehyde and ethylene glycol in the presence of aminosulfonic acid which was used as catalyst.The effects of molar ratio of benzaldehyde to ethylene glycol,reaction time,amount of catalyst and water carrying agent,etc.on the yield of benzaldehyde ethylene glycol acetal were investigated.The best reaction conditions were found as follows:n(benzaldehyde):n (ethylene glycol)=1:1.5,the mass ratio of aminosulfonic acid was 1.5% of total reactants,the water carrying agent was 16mL (2.18% of total reactants) and the reaction time was 1.5h.Under these conditions,the yield of benzaldehyde ethylene glycol acetal could reach 83.73%.%以氨基磺酸为催化剂合成了苯甲醛乙二醇缩醛,考察了醛醇摩尔比,反应时间,催化剂用量,带水剂用量等因素对苯甲醛乙二醇缩醛收率的影响.结果表明:最适宜的工艺条件是:n(苯甲醛):n(乙二醇)=1:1.5,催化剂用量占反应物总质量的1.5%,带水剂环己烷用量为16mL(占反应物总质量的2.18%),反应时间1.5h,上述条件下,苯甲醛乙二醇缩醛收率可达到83.73%.
    • 张庆磊; 吕晓龙; 杨士春; 武春瑞; 刘娟娟
    • 摘要: 利用醇类与醛类化合物的缩醛化反应,生成枝状或网状非水溶性的亲水性大分子,以制备具有持久亲水性的聚偏氟乙烯中空纤维膜.根据溶液的浊度变化来确定交联程度.反应体系为戊二醛与聚乙烯醇(PVA)在溶剂二甲基乙酰胺中的缩醛化反应,反应温度为70°C,反应时间30 min,催化剂为盐酸(质量分数36.5%).改性后的聚偏氟乙烯(PVDF)分离膜的亲水性、水通量明显提高,蛋白吸附性降低,有较好的化学稳定性.随着PVA浓度的增加,膜材料的接触角相应变小,亲水性能增强,蛋白吸附性降低.%Using the acetalization of alcohols and aldehydes to prepare enduring hydrophilic PVDF membrane. The reaction can produce non-water-soluble hydrophilic macromolecules with branching or network structure. According to the NTU of solution, we determine the solubility of crosslinks. The system is identified as the acetalization of glutaraldehyde with polyvinyl alcohol (PVA, 1 750 + 50) in the solvent DMAc. The catalyst is concentrated hydrochloric acid (36. 5%). Reaction temperature is 70 °C and reaction time is 30 min . Modifications of PVDF membrane significantly increase hydrophilicity and water flux, decrease protein adsorption and have better chemical stability. The contact angle and the protein adsorption of the membrane material are reduced while the hydrophilic performance enhanced with the increasing of PVA concentration.
    • 吴敏; 倪才华
    • 摘要: Hydrophobically modified alginate were obtained through acetalization of alginate with p-methoxy benzaldehyde catalysted by an acid. The modified alginate was characterized by FTIR spectra, fluorescence, transmission electronic microscopy, scanning e-lectronic microscopy, UV spectrum, thermal analysis. The modified alginate hydrogel was used as a drug carrier for encapsulation and release of bovine serum albumin. The results showed that drug loading ability and slow release were observed.%在酸催化下使海藻酸钠与对甲氧基苯甲醛(又名大茴香醛)发生缩醛化反应,使其疏水改性,并将其制备成凝胶.利用红外(FFIR)、荧光、透射电镜(TEM)、扫描电镜(SEM)、紫外、热重分析(TGA)对产物进行了表征.结果表明,大茴香醛成功地与海藻酸钠发生了反应.该凝胶可以作为药物载体对牛血清白蛋白进行包埋释放,结果发现,改性后的产物其载药率和缓释性能比未改性的海藻酸钠有了一定的提高.
    • 王俏; 张玉琦; 魏清波; 刘勇
    • 摘要: 以环境友好试剂氯化锡为催化剂,对苯甲醛与乙二醇的缩合反应进行了研究,考察了该绿色催化剂的用量、醛醇摩尔比、带水剂等因素对苯甲醛乙二醇缩醛收率的影响.实验结果表明,氯化锡有较好的催化活性.在回流条件下,催化剂用量约占醛用量的2.83%质量分数,醛醇物质的量的比为1∶1.5,带水剂环己烷的用量为5mL时,反应90min,苯甲醛与乙二醇缩醛收率达77.3%.%The condensation reaction of benzaldehyde and ethylene glycol was studied in the presence of a new environmentally friendly catalyst SnCl4·5H2O. The obtained results indicated that SnCU·SH2O possessed a fairly high catalytic activity for this acetalization reaction. The effects on the yield of benzaldehyde ethylene acetal were discussed, such as the catalyst amount, molar ratio of benzaldehyde to ethylene glycol and water carrying agent. The optimum conditions were obtained as follows: the molar ratio of benzaldehyde to ethylene glycol was 1:1.5, the mass fraction of catalyst was 2.83% of benzaldehyde, the water carrying agent cyclohexane was 5mL and the reaction time was 90min. Under the above conditions, the yield of benzaldehyde ethylene acetal was up to 77.3%.
    • 章根宝; 徐勇智; 范卫东; 党登峰; 洪丰庆
    • 摘要: 采用强酸性离子交换树脂、环己烷分别替代传统的催化剂硫酸及带水剂苯,以2-丁烯-1,4-二醇和正丁醛为原料,制备了2-正丙基-4,7-二氢-1,3-二氧七环,研究了收率的各种影响因素.改进后的工艺革除了高毒性苯,正丁醛与2-丁烯-1,4-二醇最佳投料比为1.2∶1(摩尔比),收率达95%以上,催化剂可循环使用5次.本工艺后处理简单,适于工业化应用.%In stead of traditional sulfuric acid catalyst and benzene as water-carrying agent,strongly acidic ion exchange resin and cyclohexane were applied to the preparation of 4,7-dihydro-2-n-propyl-l ,3-dioxetpin from 2-butane-1 ,4-diol and butyraldehyde, and the factors affecting the yield were studied. After high toxic benzene removed, the optimum molar ratio of butyraldehyde to 2-butane-l ,4-diol is 1. 2 : 1, the yield is above 95% ,and the catalyst can be recycled 5 times. The post treatment of this process is simple,so it is suitable for industrial application.
    • 杨水金; 成鹏翔; 白爱民
    • 摘要: 以硫酸铁铵为催化剂,苯甲醛和1,2-丙二醇为原料,合成了苯甲醛1,2-丙二醇缩醛.探讨了硫酸铁铵对缩醛反应的催化活性,较系统地研究了醛醇物质的量比、催化剂用量、带水剂用量、反应时间等因素对产物收率的影响,确定了适宜的反应条件:苯甲醛与1,2-丙二醇物质的量比为1∶1.5,催化剂用量为反应物料总质量的1.36%,带水剂环己烷的用量为8 mL,反应时间4 h.在上述条件下,苯甲醛1,2-丙二醇缩醛的收率可达83.5%.硫酸铁铵是合成苯甲醛1,2-丙二醇缩醛的良好催化剂.
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