长链脂肪族双酰基己二酰二肼衍生物的合成及其金属减活作用

合成了 4种己二酰二肼的长链脂肪族双酰基衍生物 :N ,N′ 二戊酰基己二酰二肼 ,N ,N′ 二庚酰基己二酰二肼 ,N ,N′ 二辛酰基己二酰二肼和N ,N′ 二月桂酰基己二酰二肼。条件实验表明 :当己二酰二肼用量为 8 8g(0 0 5mol) ,酰氯 0 12 5mol,Na2 CO3 5 3g(0 0 5mol) ,CCl4 40mL ,反应时间 3h ,酰化物最高产率可达 86 4%。热烘箱老化实验表明它们都具有显著的金属减活作用 :在 15 0℃条件下 ,相应试样的耐老化时间分别为 436h、489h、5 16h和 2 5 5h ,均高于我国电缆行业标准要求的 16 8h     

金属减活剂N,N′—二乙酰基己二酰二肼的合成及应用

研究了由己二酸二乙酯与水合肼反应合成己二酰二肼，再用乙酸酐酰化己二酰二肼得到金属减活剂Ｎ，Ｎ′－二乙酰基己二酰二肼的工艺条件，并测试了其应用性能。     

己二酰二腙类化合物的微波无溶剂合成

在微波无溶剂的条件下,由自制的己二酰二肼和芳醛反应,合成了12种己二酰二腙类化合物。反应过程中无需用到载体和催化剂,实验证明此方法方便、简单、环境友好,是合成此类化合物的有价值的新方法。     

己二酰-1′，6′-双（4-卤苯肼）的合成及其氧化脱氢研究

以己二酰二氯、4-卤苯肼为原料,在冰浴中合成了3种己二酰-1′,6′-双(4-卤苯肼)化合物,用NBS/吡啶氧化体系脱氢得3种新化合物己二酰-1′,6′-双(4-卤偶氮苯)化合物,并用元素分析I、R1、HNMR对合成的化合物进行了表征。     

5,5’-亚甲基二水杨酰基二水杨酰肼的合成及表征

以水杨酸为底物合成一种新的对称双酰肼化合物5,5’-二水杨酰基二水杨酰肼,经红外光谱分析、元素分析及质谱分析,最终的反应产物为标题化合物,纯度为98.2%,产率为75.1%。     

5,5＇-亚甲基二水杨酰基二水杨酰肼的合成及表征

以水杨酸为底物合成一种新的对称双酰肼化合物5,5＇-二水杨酰基二水杨酰肼,经红外光谱分析、元素分析及质谱分析,最终的反应产物为标题化合物,纯度为98.2%,产率为75.1%。     

N,N′-双月桂酰基乙二胺二乙酸钠合成方法的改进

对表面活性剂N ,N′ 双月桂酰基乙二胺二乙酸钠的合成方法进行了改进。以乙二胺与氯乙酸钠反应制备乙二胺N ,N′ 二乙酸钠 (中间体 ) ,再与月桂酰氯反应制备终产物N ,N′ 双月桂酰基乙二胺二乙酸钠。用正交法对合成条件进行了探索。合成中间体最佳条件为温度 2 5℃ ,n(氯乙酸 )∶n(乙二胺 ) =(3 15～ 3 45 )∶1 0 0 ,反应时间 2 4h。终产物的合成条件为温度 15℃ ,反应时间为 2 4h。以IR、13CNMR和1HNMR确定结构     

新型去氢枞基1,3,4-(噁)二唑的合成与表征

以去氢枞酸为原料,经酰化得到酰氯,酰氯与85%(质量分数)水合肼反应制备出去氢枞酰肼,去氢枞酰肼再与5种芳香酰氯反应得N,N'-二酰基肼,其再经POCl3脱水闭环反应,合成了5种新的2-去氢枞基-5-芳基-1,3,4-(噁)二唑.研究了合成反应条件;每步收率均在75%以上.     

改性咪唑的合成及其促进EP/己二酰肼固化体系的研究

以顺丁烯二酸作为2-乙基-4-甲基咪唑(EMI)的改性剂,合成出一种潜伏性促进剂——改性咪唑,并采用红外光谱(FT-IR)法对其结构进行了表征。以己二酰肼作为环氧树脂(EP)的固化剂,考察了改性咪唑对EP/己二酰肼胶粘剂的凝胶时间、固化特性、室温储存期和粘接性能等影响。结果表明:当w(改性咪唑)=1.5%时,改性咪唑对EP/己二酰肼体系具有较好的促进作用(体系放热温度下降了20℃左右);该胶粘剂的固化条件为"110℃/1 h→130℃/1 h",室温储存期超过60 d,并具有粘接性能优、耐水性能好等特点。     

2,5-双去氢枞基-1,3,4-噻二唑和2,5-双去氢枞基-1,3,4-(噁)二唑的合成

以去氢枞酸为原料,经PCl3或SOCl2酰化得到去氢枞酰氯,与水合肼进行酰肼化反应得到N,N-二去氢枞酰基肼,再分别经过闭环和缩合反应得到目标化合物。研究了各化合物的反应条件;其中N,N-二去氢枞酰基肼的合成可在室温下完成,收率86.2%;合成2,5-双去氢枞基-1,3,4-噻二唑的最佳闭环剂是POCl3,在POCl3既做闭环剂又做溶剂的条件下,收率83.2%;2,5-双去氢枞基-1,3,4-噁二唑的合成中,在P2S5的作用下,以吡啶作为溶剂,收率可达到85.5%;整个合成路线中各步反应的收率都在80%以上,高收率得到目标化合物;其结构经IR、1HNMR和元素分析进行表征和确证。     

Preparation and in vitro controlled release behavior of a novel pH-sensitive drug carrier for colon delivery

The synthesis of a novel complex system designed for colon-targeting drug delivery was reported. The complex was prepared by dialdehyde konjac glucomannan and adipic dihydrazides to form steady Schiff base, and crosslinking with 5-aminosalicylic acid (5-ASA) through glutaraldehyde as a cross-linking agent. The structure was characterized by Fourier transform infrared (FTIR) spectroscopy, ¹³C NMR, wide angle X-ray diffraction (WAXRD) and thermogravimetric analysis. In vitro release of 5-ASA from the complex showed that the total released 5-ASA after 24 h in buffer solution at pH 1.2, 6.8, and 7.4 were 4, 59, and 21%, respectively. The release rate of 5-ASA can be controlled by tuning the pH value more effectively. The results indicated that the novel pH-sensitive complex could be potentially useful for colon-targeting drug delivery system.     

N_2O减排清洁发展机制项目过程分析与设计

在环己醇、环己酮经硝酸氧化生产己二酸的过程中,产生富含N2O的废气。文章通过对N2O催化分解减排工艺过程的分析,结合清洁发展机制(CDM)规则要求和装置的工艺特点,在设计中采用了变频调速控制技术,优化换热流程和发生低压蒸气等节能措施,在N2O减排率达到95%的基础上,实现了年节电12.2×104kW.h和热能回收率88%,进而提高了项目活动减排量。并依据CDM项目方法学及其参数的计算方法,设置了支持方法学的实时监测系统和数据采集系统,满足了减排量的核算要求。装置运行结果表明,作为CDM项目,实现了环境效益和经济效益的双赢。     

Effect of aliphatic diacyl adipic dihydrazides on the crystallization of poly(lactic acid)

A series of aliphatic diacyl adipic dihydrazides (ADHs) with different alkyl moieties were synthesized by the reaction between adipic dihydrazide and acyl chloride. Then these ADHs were solution blended with PLA respectively and were evaluated as nucleating agents. Through the investigation of nonisothermal and isothermal crystallization, it was found that both the crystallization rate and the crystallinity of PLA could be enhanced by adding only 1 wt % of ADHs. Especially for ADH‐Oc (ADH‐Octyl), the crystallization rate of PLA increased about 4 times at 105°C. Optical morphology showed that and the size of PLA spherulites decreased and the nucleation density increased with the existence of ADH‐Oc. Meanwhile, the crystal structure of PLA were not discerniblly affected after the addition of ADHs as found by wide‐angle X‐ray diffraction. Thus, this study suggested these ADHs compounds are simple and potential nucleating agents to enhance crystallization ability of PLA. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132, 42028.     

N2O催化分解技术在处理己二酸尾气中的应用

介绍了分解己二酸生产过程中产生的N2O的常用方法,重点介绍了催化分解N2O技术以及工艺特点,对此项技术在试车及生产中可能出现的问题做出详细的分析,并提出相应的预防和改进措施。     

The nucleation effect of N,N′-bis(benzoyl) alkyl diacid dihydrazides on crystallization of biodegradable poly(l-lactic acid)

Five N,N??-bis(benzoyl) alkyl diacid dihydrazides were synthesized from benzoyl hydrazine and alkyl diacyl dichloride which were derived from alkyl diacid via acylation. PLLA/N,N??-bis(benzoyl) alkyl diacid dihydrazide samples were prepared by melt blending and hot-press forming process. The nucleation effect of N,N??-bis(benzoyl) alkyl diacid dihydrazide on crystallization of biodegradable poly(l-lactic acid) (PLLA) was investigated using differential scanning calorimetry (DSC) and vicat softening analysis. The results showed that five N,N??-bis(benzoyl) alkyl diacid dihydrazides acted as powerful nucleating agent for PLLA; with incorporation of N,N??-bis(benzoyl) alkyl diacid dihydrazide, the crystallization peak became sharper and shifted to higher temperature as the degree of supercooling decreased at a cooling rate of 1?°C/min from melt. The nucleation activities of five N,N??-bis(benzoyl) alkyl diacid dihydrazides were quantitatively determined. It is shown that N,N??-bis(benzoyl) suberic acid dihydrazide has higher nucleating activity than the other N,N??-bis(benzoyl) alkyl diacid dihydrazides. In the presence of N,N??-bis(benzoyl) alkyl diacid dihydrazide, the melting behavior of PLLA is affected significantly. In addition, the thermal stability of PLLA/0.8?% N,N??-bis(benzoyl) alkyl diacid dihydrazide is tested and reported. Compared to the neat PLLA, the onset degradation temperature of PLLA/0.8?% N,N??-bis(benzoyl) alkyl diacid dihydrazide samples has been decreased significantly.     

己二酸二酰肼合成工艺研究

对两步法合成己二酸二酰肼（ADH）的工艺条件进行了研究。首先采用己二酸和甲醇酯化反应合成了己二酸二甲酯,然后将己二酸二甲酯与水合肼酰肼化,得到了高纯度己二酸二酰肼,并确定了适宜的工艺条件：对于酯化反应,催化剂为KHSO₄,用量为己二酸质量数的5.5%,n(醇)/n(酸)为4.0,反应时间1.0 h,在该条件下,产品己二酸二甲酯质量分数高达99.8%,收率为77%;对于酰肼化反应,n（肼）/n（酯）、n（醇）/n（酯）比均为4.0,反应时间为1.5 h,此条件下,ADH收率达99%,质量分数高达99.5%。     

环己烷氧化物水洗液氧化制精己二酸的工艺研究

采用氧化-萃取-结晶-重结晶的方法,将环己烷氧化液酸洗水浓缩液进行氧化,再萃取出影响已二酸结晶的物质,结晶分离出粗己二酸,再对粗己二酸进行重结品,干燥得到精己二酸。结果表明:以氧化剂A和H_2O_2为氧化剂,氧化时间2h,氧化温度65℃,氧化液用萃取剂进行萃取,萃取后的水相在30℃结晶2h,再在35℃下重结晶,得到的己二酸纯度达到99.8%,收率约40%,熔点151.41℃。     

连续酯化制备1，6-己二酸二甲酯

以DNW-I型强酸型阳离子交换树脂（DNW-I型催化剂）为催化剂,己二酸和甲醇为原料,经间歇酯化和连续酯化反应后通过精馏可制备选择性为100％的1,6-己二酸二甲酯。结果表明,当DNW-I型催化剂用量为5％（以己二酸计,m／m,下同）时,己二酸间歇及连续酯化后转化率分别大于68％和98％。优化实验条件为：间歇酯化：催化剂用量5％,凡（甲醇）：n（己二酸）=2．5：1．0,反应温度80-85℃,反应时间4h：连续酯化：间歇酯化产物进料为30～70mL／h,甲醇进料为95-210mL／h,醇酸摩尔比〉60。