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合成富马酸二甲酯的固体超强酸催化剂的研究 总被引:1,自引:0,他引:1
研究了以ZrO2/SO4=固体超强酸为催化剂催化富马酸与甲醇合成富马酸二甲酯的反应,表征了催化剂的物化性质,探讨了催化剂的制备条件、原料配比、反应时间、催化剂用量等工艺参数对收率的影响。催化剂的重复使用实验表明,ZrO2/SO4=是富马酸二甲酯合成的较适宜的催化剂。 相似文献
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研究了以ZrO2/SO^-4固体经酸为催化剂催化富马酸与甲醇合成富马酸二甲酯的反应,表征了催化剂的物化性质,探讨了催化剂的制备条件,原料配比,反应时间,催化剂用量等工艺参数对收率的影响,催化剂重复使用的实验表明,ZrO2/SO^-4是富马酸二甲酯合成的较适宜的催化剂。 相似文献
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对近十年磷钼酸及其盐类和衍生物催化酯类化合物的合成方法进行了综述,详细综述了磷钼酸等新型催化剂催化合成草酸二丁酯、富马酸二甲酯、丙酸异戊酯、乙酸环己酯、乙酸苄酯、氯乙酸乙酯、己酸乙酯、乳酸正丁酯、乙酸乙酯、苹果酯、顺丁烯二酸二丁酯的方法和磷钼酸光催化降解性能。 相似文献
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对苯二甲酸二甲酯合成1,4-环己烷二甲酸二甲酯的研究进展 总被引:2,自引:0,他引:2
介绍了以对苯二甲酸二甲酯 (简称DMT)为原料 ,经催化加氢制备 1,4 环己烷二甲酸二甲酯的合成工艺 ,分析了催化剂、操作压力等对反应的影响。 相似文献
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三氧化二钕催化合成富马酸二甲酯 总被引:12,自引:2,他引:10
探讨了以三氧化二钕为固体催化剂 ,由马来酸酐经浓盐酸催化转化为富马酸和甲醇制备富马酸二甲酯 ,讨论了催化酯化的各种影响因素。与硫酸催化相比 ,三氧化二钕用量少 ,反应时间短 ( 4 h) ,产率较高 (约90 % ) ,而废水减少 相似文献
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亚磷酸二甲酯合成研究 总被引:3,自引:0,他引:3
索陇宁 《精细石油化工进展》2000,1(11):7-9
研究了用三氯化磷和甲醇合成亚磷酸二甲酯的方法,讨论了物料配比、温度、反应时间、溶剂用量等因素对反应的影响。确定了合成亚磷酸二甲酯的最佳反应条件。在选择的试验条例上产率为83.6%。 相似文献
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C_(22)三元羧酸的合成与应用研究 总被引:10,自引:1,他引:10
研究了由亚油酸和富马酸通过 Diels Alder反应合成 C2 2 三元羧酸的工艺方法 ,探讨了投料比、反应温度、催化剂用量和反应时间对产物的影响。还介绍了 C2 2 三元羧酸及其衍生物的实际工业应用 相似文献
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不饱和聚酯缩聚反应动力学 总被引:1,自引:0,他引:1
在反应温度175—21O℃和醇/酸摩尔比为1.1的条件下,研究了二甘醇-顺酐、二甘醇-苯酐二元体系和二甘醇-苯酐-顺酐三元体系的缩聚反应动力学特征。结果表明,二甘醇-顺酐体系在转化率40—95%范围时,各个温度下的反应均为二级;而二甘醇-苯酐体系在转化率小于65%时为二级反应,大于65%时变为三级反应。二甘醇-苯酐-顺酐三元体系,无催化剂时属三级反应,外加催化剂时为二级反应。测定了各体系反应的活化能。 相似文献
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《Petroleum Science and Technology》2007,25(5):671-681
-Olefin maleic anhydride copolymers were prepared by reacting C8 or C14 olefin with maleic anhydride, then esterified with dodecyl or NAFOL 1822B alcohol, purified and characterized through average molecular weight, polydispersity index, and infrared spectroscopy. A waxy crude oil (pour point = 21°C and wax content = 18.9 wt%) was treated with the four synthesized additives as pour-point depressants and determined using x-ray diffractometer. It is found that the x-ray diffraction patterns of waxes with additives are remarkably different from those without additives. The NAFOL 1822B ester of 1-tetradecene maleic anhydride copolymer also show stronger interaction with the wax than NAFOL 1822B ester of 1-octene copolymer, dodecyl ester of 1-tetradecene maleic anhydride copolymer, and dodecy ester of 1-octene maleic anhydride copolymer. These effects can be attributed to the chain length of side hydrocarbon. The wax solubilization is a function of copolymer. 相似文献
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T. T. Khidr 《Petroleum Science and Technology》2013,31(5):671-681
Abstract α-Olefin maleic anhydride copolymers were prepared by reacting C8 or C14 olefin with maleic anhydride, then esterified with dodecyl or NAFOL 1822B alcohol, purified and characterized through average molecular weight, polydispersity index, and infrared spectroscopy. A waxy crude oil (pour point = 21°C and wax content = 18.9 wt%) was treated with the four synthesized additives as pour-point depressants and determined using x-ray diffractometer. It is found that the x-ray diffraction patterns of waxes with additives are remarkably different from those without additives. The NAFOL 1822B ester of 1-tetradecene maleic anhydride copolymer also show stronger interaction with the wax than NAFOL 1822B ester of 1-octene copolymer, dodecyl ester of 1-tetradecene maleic anhydride copolymer, and dodecy ester of 1-octene maleic anhydride copolymer. These effects can be attributed to the chain length of side hydrocarbon. The wax solubilization is a function of copolymer. 相似文献
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利用双环戊二烯合成涂料 总被引:4,自引:1,他引:3
双环戊二烯(DCPD)与马来酸酐或其它芳香酸酐均可在硫酸或三氟化硼的乙醚溶液催化下发生反应生成相应的单酯化合物,然后与苯乙烯共聚合成汽车腻子。测定了基本物性,并用IR,′HNMR进行了表征。 相似文献
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在不同水含量有机法制备的V-P-O催化剂母体或La、Fe助催化的V-P-O催化剂母体中,均含有VOHPO_4·H_2O.随着原料中及制备过程中水含量的减少,使用后的V-P-O催化剂中(VO)_zP_2O_7含量逐渐增多,提高了催化剂对正丁烷氧化制顺酐的活性.Fe的加入有助于正丁烷的转化,但选择性降低. 相似文献
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介绍了由醛、酰肼、羧酸、酰氯、酐或酯合成酰基叠氮化合物方法,综述了酰基叠氮化合物在有机合成中的应用。 相似文献
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在溶剂法基础上,以苯酐为原料,复合碘作催化剂,产品直接结晶分离的方法合成四氯邻苯二甲酸酐。改进后的工艺反应温度低,反应时间短,后处理简单,溶剂和催化剂可回收使用,确定了最佳合成工艺条件,反应时间12h,反应温度70-120℃,催化剂用量为苯酐质量的1%,溶剂氯磺酸用量为苯酐质量的5.5倍。上述条件下,产品四氯苯酐的纯度达99%,收率为98%。 相似文献
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Lilianna Z. Pillon 《Petroleum Science and Technology》2001,19(7):863-873
Since the traditional deasphalting process is expensive, a more economical approach would be to use dispersants or flocculants to control the colloidal stability of asphaltenes. The asphaltene content of fuel oils is defined by testing the n-heptane insolubles following the ASTM D 3279 method. In the presence of dodecylbenzenesulfonic acid, a decrease in n-heptane insolubles precipitation was observed indicating an increase in their colloidal stability. No significant change in n-heptane insolubles precipitation was observed in the presence of dodecylphenol and nonylphenol. Poly(maleic anhydride-1-octadecene) polymer was found to be an effective flocculant. The flocculation of n-heptane insolubles varied depending on the polymer-to-asphaltenes weight ratios. The FTIR results indicate that the flocculation occurs through the H-bonding between the asphaltenes and the polymer molecules. Maleic anhydride was found to continuously increase the n-heptane insolubles precipitation with an increase in its treat rate. The FTIR analysis showed the presence of an acidic C=O group and no presence of an anhydride functional group. The results indicate that the presence of an anhydride and unsaturation makes the maleic anhydride too reactive leading to chemical changes and the precipitation of asphaltenes and other aromatic molecules found in fuel oils. 相似文献