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三氯化磷法合成O-(1,2,2,2-四氯乙基)硫代磷酰二氯的工艺研究 总被引:1,自引:0,他引:1
研究了以三氯化磷、一氯化硫为原料合成O (1,2,2,2 四氯乙基)硫代磷酰二氯的工艺,讨论了温度、催化剂、反应时间、原料摩尔比等对反应的影响,获得了较好的工艺条件为:原料摩尔配比PCl3∶S2Cl2∶CCl3CHO∶催化剂B=31∶2∶1∶075;反应温度-8~-4℃;反应时间9h;收率达6653%。 相似文献
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5-溴戊酸的合成研究 总被引:1,自引:0,他引:1
以1.5-戊二醇、氢溴酸为原料,苯为分水剂,合成5-溴戊酸。通过正交实验得出最佳合成条件:反应时间8h,反应温度80℃.n(分水剂)=2%(相对于1.5-戊二醇),1.5戊二醇与氢溴酸的摩尔比为1:1.2.5-溴戊酸收率90%。 相似文献
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以工业废氢溴酸与正丁醇为原料,在浓硫酸存在的条件下合成1-溴代丁烷。考察了反应条件对产率的影响,比较合适的反应条件为:正丁醇、氢溴酸和浓硫酸物质的量比为1:1.13:1.37,反应时间5h。分离产率达到93.8%。粗产品经气相色谱分析证明无副产物,产品经IR和折光率进行表征。 相似文献
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以2,3,4,5 四溴邻苯二甲酸酐和二丁基氧化锡为原料,以四氢呋喃为溶剂,于60℃反应16h。合成了2,3,4,5 四溴邻苯二甲酸二丁基锡,其产率可达838%。产物用1HNMR、13CN MR、IR及元素分析进行了表征。 相似文献
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没食子酸酯合成方法改进及其抗血小板聚集作用 总被引:23,自引:0,他引:23
没食子酸乙酯、丙酯、丁酯及十二烷醇酯的合成,用对甲苯磺酸替代浓硫酸作催化剂,采用梯度升温法进行合成。乙酯和丙酯的合成还摒弃了带水剂。最佳的合成条件为:丙酯和乙酯:酸、醇、催化剂的摩尔比为0.0825∶0.934∶0.00524,反应温度为120℃,反应时间4h,收率942%和854%。丁酯:酸、醇、催化剂的摩尔比为0.0522∶0.874∶0.00394,反应温度为115~120℃,反应时间5h,收率868%。十二烷醇酯:以1,4 二氧六环作溶剂,4A分子筛作吸水剂,酸、醇、催化剂的摩尔比为0.075∶0.091∶0.012,反应温度为124℃,反应时间为14h,收率937%。异丙酯:采用干燥氯化氢作催化剂,没食子酸与异丙醇的摩尔比为0147∶137,加热回流8h,收率881%。十二烷醇酯的抗血小板聚集性能最好。 相似文献
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以乙酰丙酮(ACA)、环氧氯丙烷(ECH)为原料,通过氯代烃的亲核取代及环氧的水解开环反应合成了5,6-二羟基-2-己酮(DH0),讨论了合成DHO的适宜条件及分离提纯的方法,并采用订-IR、NMR、HRMS等方法对DHO进行了表征。结果表明,ACA与ECH的最佳反应温度为60℃,中间产物5,6-环氧-2-己酮(EHO)收率达37.1%;EHO水解开环反应最佳反应温度为90℃,反应时间为8h,DHO收率可达69.5%,且中间产物5-(乙酰氧基)-6-羟基-2-己酮经碱水解也可以得到DHO;分离与提纯采用制备液相色谱法可得到DHO产物,纯度达95.96%,并得到FT—IR、NMR、HRMS方法的证实,该产物可作为水性聚氨酯交联扩链剂。 相似文献
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以月桂酸、二溴新戊二醇和N-甲基咪唑为主要原料,经酯化、季铵化反应合成了一种新型双酯双咪唑类表面活性剂二溴-1,3-双(3-甲基咪唑)-2,2-双(十二酸酯甲基)-丙烷(EminC12)。实验得到酯化反应条件:n(月桂酸)∶n(二溴新戊二醇)=2.2∶1,反应温度为115℃,反应时间7 h,对甲苯磺酸为催化剂,甲苯为带水剂,得到中间体1,3-二溴-2,2-双(十二酸酯甲基)-丙烷(DEC12),产率为87%;季铵化反应条件:反应温度150℃,反应时间5 h,目标产物产率可达80%;产物结构通过元素分析、IR、1HNMR得到证实。25℃时其水溶液的临界胶束浓度为0.3 mmol/L,表面张力为39 mN/m,具有较好的起泡性和稳泡性。 相似文献
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4-(4-甲基哌嗪-1-甲基)苯甲酸二盐酸盐的合成 总被引:1,自引:0,他引:1
以4-甲基苯甲酸为起始原料,经α-位溴化、胺化后不经分离直接酸化制得4-(4-甲基哌嗪-1-甲基)苯甲酸二盐酸盐.考察了溴化剂、引发剂对溴化反应及原料配比、反应温度、反应时间等对胺化过程的影响.得到的工艺条件为:①N-溴代丁二酰亚胺(NBS)为溴化剂、过氧化苯甲酰(BPO)为引发剂,4-溴甲基苯甲酸收率为88.7%;②n(4-溴甲基苯甲酸)∶n(N-甲基哌嗪)=11∶.2,碳酸氢钠为缚酸剂,反应温度20~25℃,反应时间8 h,产品收率81.5%.通过熔点、红外光谱、核磁共振氢谱确定了目标化合物的结构. 相似文献
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以硫酸高铈为催化剂,丁酮和1,2-丙二醇反应合成丁酮1,2-丙二醇缩酮.探讨了硫酸高铈对缩酮反应的催化活性,研究了酮醇物质的量比、催化剂用量和反应时间等因素对产品收率的影响.结果表明,硫酸高铈是合成丁酮1,2-丙二醇缩酮的良好催化剂,在丁酮与1,2-丙二醇物质的量比1:1.6、催化剂用量0.4 g、反应温度(80~10... 相似文献
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以硝基甲烷和四醛为原料,在碱性条件下经烷基羟基化和溴化两步合成2-溴-2-硝基-1,3-二丙二醇,考虑了烷基羟基化反应,溴化反应温度,时间,对产品收率的影响.收率可达78.6% 相似文献
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Comparison of Adipic Versus Renewable Azelaic Acid Polyester Polyols as Building Blocks in Soft Thermoplastic Polyurethanes
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Norhayati Mohd Noor Aisa Sendijarevic Vahid Sendijarevic Ibrahim Sendijarevic Tuan Noor Maznee Tuan Ismail Mohd Azmil Mohd Noor Yeong Shoot Kian Hazimah Abu Hassan 《Journal of the American Oil Chemists' Society》2016,93(11):1529-1540
In this study, novel polyester diols of 2000 molecular weight (MW) were synthesized by reacting azelaic acid (AZ) with 1,3‐propanediol (1,3‐PDO) and diethylene glycol (DEG) in the esterification reaction catalyzed with a small amount of butyltintris(2‐ethylhexanoate). As a reference, polyester polyols of 2000 MW were synthesized from adipic acid (AA) with 1,3‐PDO and DEG. The properties of polyester polyols were evaluated. The polyester polyol based on AZ and 1,3‐PDO is 100 % renewable polyol; 1,3‐PDO used in the syntheses is renewable product produced by fermentation process of sugar. Both 1,3‐PDO‐polyester polyols exhibited crystalline transition above room temperature, while DEG‐polyester polyols were liquid at room temperature. The polyester polyols were chain‐extended with 4,4′‐diphenylmethane diisocyanate (Mondur M) and 1,4‐butanediol (BDO) to form thermoplastic polyurethanes (TPU). TPU were evaluated for mechanical and water resistance properties, and their morphology were studied via differential scanning calorimetry (DSC), Fourier transform infrared (FTIR), and atomic force microscope (AFM). TPU based on azelate and adipate polyols were relatively soft elastomeric materials with high melting temperatures. AFM analyses of TPU indicated better phase separation in 1,3‐PDO polyester polyols with the highest phase separation observed in TPU based on 1,3‐PDO/azelaic acid polyols. Water resistance of TPU based on azelate polyols was improved as compared to TPU based on adipate polyols. 相似文献
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Synthesis of novel acrylic modified water reducible alkyd resin: Investigation of acrylic copolymer ratio effect on film properties and thermal behaviors
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Nagihan Akgün Özge Naz Büyükyonga Işıl Acar Gamze Güçlü 《Polymer Engineering and Science》2016,56(8):947-954
New four‐component water reducible acrylic modified alkyd resins that are based on 1,3‐propanediol and contain different ratios of acrylic copolymer (AC) were synthesized by using a novel four‐stage fatty acid method. The final content of solids in the water reducible acrylic modified alkyd resins was 60% by weight. After the modified alkyd resin films were cured at 150°C for 1 h, it was observed that the use of AC as the modifier component had improved their physical and chemical surface coating properties and thermal behaviors. Experimental results show that the optimum AC ratio is 40% of the equivalent amount of AC to alkyd resin. Low‐volatile organic compounds (VOC) content water reducible acrylic modified alkyd resins yielded soft and flexible films with high chemical/thermal resistance, suitable for manufacturing of surface coating binders. POLYM. ENG. SCI., 56:947–954, 2016. © 2016 Society of Plastics Engineers 相似文献