含氟醇类化合物应用及合成研究进展

叙述了含氟醇类化合物在医药、农药、含氟表面活性剂、染料、能源等方面的应用以及国内外在合成含氟醇类化合物上的研究成果,评述了各种合成方法的优缺点,并对含氟醇类化合物合成的发展趋势作出了展望。认为相催化加氢路线可应用于高沸点含氟醇的合成,而气相催化加氢路线适于低沸点含氟醇的合成。     

加氢脱氯技术及其催化剂研究进展

加氢脱氯技术是含氯有机物,特别是含氯氟烃绿色转化处理的关键技术,也是合成高附加值含氟精细化学品和含氟单体的重要途径。本文对发展加氢脱氯技术的意义、加氢脱氯反应机理、加氢脱氯催化剂的研究进展以及加氢脱氯技术的应用及展望等方面进行了详细评述。     

2,2-二氟乙醇的合成研究进展

介绍了国内外二氟乙醇的多种合成技术及研究进展,并对各合成工艺进行了分析,认为以含氟羰基化合物为原料的催化加氢还原法,具有生产条件简单、转化率及收率高等优点,工业化价值高。     

γ-丁内酯的催化合成技术进展

评述了γ-丁内酯的催化合成技术进展,重点阐述了1,4-丁二醇催化脱氢法和顺酐催化加氢法及2者耦合等方法催化合成γ-丁内酯催化剂方面的研究成果及合成工艺方面的技术进展,并介绍了广受γ-丁内酯合成企业关注的2种新型合成工艺技术。认为开发高效、高选择性、无毒无害的催化剂及绿色环保的新工艺,将是今后γ-丁内酯合成研究的主要方向。     

硝基苯加氢合成对氨基苯酚的催化剂研究进展

对氨基苯酚是一种重要的医药、农药、染料中间体。以硝基苯为原料直接一步催化加氢合成对氨基苯酚具有成本低、收率高、三废排放少等优点,是一条绿色的合成路线。详细综述了硝基苯加氢生成羟基苯胺及羟基苯胺Bamberger重排生成对氨基苯酚的反应机理,加氢及重排催化剂研究等方面的研究进展,介绍了表面活性剂助剂对对氨基苯酚选择性及收率的影响。     

对硝基苯酚催化加氢制备对氨基苯酚研究进展

对氨基苯酚是一种重要的化工和医药中间体。以对硝基苯酚为原料催化加氢生产对氨基苯酚的方法被誉为经济绿色的过程,工艺简单,产品质量高,环境污染小。综述了对硝基苯酚催化加氢制备对氨基苯酚合成工艺进展,重点介绍了加氢催化剂的研究进展。     

间氨基苯磺酸的合成方法与工业生产过程

介绍了间氨基苯磺酸的用途、合成方法及其工业生产过程,并对各种合成方法的优缺点进行了比较。铁粉还原法是工业上生产间氨基苯磺酸的主要方法,但已是国家产业政策淘汰的工艺。催化加氢法作为符合绿色化学和原子经济性的技术,在合成间氨基苯磺酸的工业生产中受到极大的关注,若能提高加氢催化剂的循环使用稳定性,催化加氢工艺在合成间氨基苯磺酸的工业生产中将具有广阔的应用前景。     

一种由对苯醌合成对苯二酚的工艺研究

系统研究了对苯醌催化加氢的工艺,并筛选了合适的加氢催化剂,优化加氢的反应工艺。系统研究了反应温度、压力及加氢方式对对苯醌催化加氢反应的影响,提高了反应的安全性,确定最佳合成工艺条件,实现对苯二酚绿色合成的工艺目标。研究结果表明：以对苯醌为原料,负载型骨架镍为催化剂,在超重力催化装置中压力为1.5 MPa,温度为90℃条件下进行连续化反应,对苯二酚的产率最高。     

苯甲酸气相加氢合成苯甲醛的催化技术

总结了合成苯甲醛的多种路径,综述了苯甲酸在气相条件下加氢合成苯甲醛催化剂的研究进展,分析了不同种类催化剂(Zr系、Zn系、Ce系)在苯甲酸气相加氢合成苯甲醛反应中的催化性能,从绿色合成工艺和催化剂制备技术等方面提出了今后的研究方向,认为关键是从化学组分优化、催化剂制备技术研究等方面增强无铬催化剂的稳定性,并进一步提高催...     

催化蒸馏技术在馏分油加氢中的应用

综述了催化蒸馏技术在石油加氢领域的应用和发展现状，包括反应器结构、催化剂装填技术及工艺技术等。对埃克森公司、IFP和CDTECH的汽、柴油催化加氢脱硫、原油直接加氢蒸馏和馏分油加氢蒸馏等技术作了重点介绍。     

Study the effect of loading non-stoichiometric zinc sulfide on optical characteristics of PVA/CMC/PVP blended polymer films

Journal of Polymer Research - A fluorinated diamine, (2,5-bis(4-amino-3-trifluoromethylphenoxy)phenyl)diphenyl-phosphine oxide (2), was synthesized via Williamson reaction and hydrogenation. A...     

Fluorinated Alcohols as Solvents for Enantioselective Hydrogenation with Chiral Self‐Assembling Rhodium Catalysts

We herein describe the beneficial effect of fluorinated alcohols on asymmetric hydrogenation using chiral self‐assembling rhodium complexes. Previously, the application of these catalysts has been hampered by low reaction rates in non‐polar solvents, which are essential for establishing the self‐assembling architecture via hydrogen bonding. Excellent reaction rates are usually observed in alcohols as solvents, but the characteristic hydrogen bonds are cleaved in those media, resulting in poor ee values. We now show for the first time that the disadvantageous properties of both solvent classes on the catalytic reaction can be overcome by using fluorinated alcohols. Due to this key finding, homogeneous catalysis with self‐assembling catalysts is much closer to practical application.     

Approaches to highly polar polymers with low glass transition temperatures. 1. Fluorinated polymers via a combination of ring-opening metathesis polymerisation and hydrogenation

The synthesis and hydrogenation of two fluorinated polymers is described. The products were characterised through a detailed study of their ¹H-, ¹³C- and ¹⁹F-NMR spectra, together with thermal and GPC analysis. Hydrogenation resulted in a significant lowering of the glass transition temperatures of the polymers.     

Highly Air‐ and Water‐Stable Fluorinated Ferrocenylphosphine‐Aminophosphine Ligands and their Applications in Asymmetric Hydrogenations

Air‐ and water‐stable fluorinated ferrocenylphosphine‐aminophosphine ligands have been synthesized and applied to the Rh‐catalyzed asymmetric hydrogenation of enamides and α‐dehydroamino acid derivatives. These reactions afforded the corresponding products in good to excellent ees (up to 99.7% ee) and nearly quantitative yields. The combination of the remarkable air‐ and water‐stability with excellent catalytic performance makes these catalysts excellent choices for practical applications.     

Insoluble Perfluoroalkylated Polymers: New Solid Supports for Supported Fluorous Phase Catalysis

New perfluoroalkylated polystyrene resins have been prepared by the suspension polymerisation of 4‐(perfluoro‐n‐octyl)styrene. The evaluation of these highly fluorinated insoluble materials as catalyst supports for rhodium‐catalysed hydrogenation of styrene and palladium‐mediated Suzuki–Miyaura carbon‐carbon bond forming reactions with 4‐bromoacetophenone and 4‐bromoanisole revealed improvements in the recycling of the perfluoroalkylated catalysts as compared to that achieved using fluorous reverse‐phase silica gel.     

含氟反式-1,4-二芳基环己烷类液晶化合物的合成

以4 苯基环己酮为起始原料,经Grignard反应,脱水,加氢,转型,Friedel Crafts反应,黄鸣龙还原等步骤,合成了一系列含氟反式 1,4 二芳基环己烷类液晶化合物,GC质量分数>99%,收率达16 0%～27 0%,较文献收率(<1%)有显著提高;该路线尤其适用于制备一系列不同烷基取代的衍生物;目标化合物经1HNMR、IR进行了结构鉴定,并通过差示扫描量热法(DSC)对其相变行为进行了测试。     

Synthesis and properties of fluorinated polyimides and fluorinated poly(imide amide)s containing pendent cyano groups

A series of fluorinated polyimides and fluorinated poly(imide amide)s containing pendent cyano groups were prepared and investigated to determine their dielectric constants as a function of relative humidity and thermal characteristics. The fluorinated polymides and fluorinated poly(imide amide)s containing pendent cyano groups were prepared by reaction of bis(4-aminophenoxy) benzonitriles with a fluorinated dianhydride and with a fluorinated di(acid chloride) containing preformed imide rings. The properties of the fluorinated polyimides and fluorinated poly(imide amide)s containing pendent cyano groups were compared with those of fluorinated polyimides and fluorinated poly(imide amide)s prepared from 1,3-bis(4-aminophenoxy)benzene. The introduction of the pendent cyano groups caused an increase in the dielectric constant and an increase in the glass transition temperature of the polymers compared with the polymers prepared without pendent cyano groups.     

六氟异丙醇的研究进展

六氟异丙醇是一种重要的含氟精细化学品,可通过六氟丙酮催化还原或者MPV反应制备。六氟异丙醇可用于制备含氟表面活性剂、含氟乳化剂、含氟医药等多种高端化学品以及作为特殊的溶剂,近年来受到越来越多的关注。     

氟化聚氨酯的合成及应用研究进展

综述了氟化聚氨酯中含氟链段的主要引入方法,即分别由聚氨酯硬段、聚氨酯软段和丙烯酸酯类单体引入,并对各自的优点和局限之处进行了评述。介绍了氟化聚氨酯材料的微相分离结构和低表面能特性,以及氟化聚氨酯材料在制造弹性体、泡沫塑料、涂料等领域的应用。并指出了氟化聚氨酯当今研究的热点和今后的发展方向。